HIAT 2012 - List of Keywords (ion)

Paper	Title	Other Keywords	Page
MOA01	Frontier Technologies and Future Directions in High Intensity ISOL RIB Production	target, proton, ISOL, vacuum	1
	P.G. Bricault, F. Ames, N. Bernier, M. Dombsky, P. Kunz, F.S. Labrecque, J. Lassen, A. Mjøs, M. Nozar, J. Wong TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	Funding: TRIUMF is funded by a contribution from the federal government through the National Research Council of Canada The future frontier of the ISOL technique is to increase the intensity of the RIB beams. In the ISOL technique there are several ways to increase substantially the production of rare isotope beam. The most expedient one is to increase the incident beam on target. Increasing the overall release efficiency and ionization efficiency are the other two easiest ways to increase the overall RIB intensity. Now with the TRIUMF/ISAC facility the ISOL RIB facility can operate routinely up to 50 kW, this is 100 μA on target. But, the driver beam intensity cannot increase without considering the radiation damage issues and the challenge to the ion source itself where ionization efficiency are dramatically affected by target out-gazing. The other technology challenge for the ISOL technique is the target material itself. The main concern is the capability of the target material to sustain high power density deposited by the driver beam. Refractory metals foil target are suitable but nevertheless very limited in the available species we can produce with those targets. Composite targets, either for carbide and oxide target material were developed at ISAC that can sustain very high power density.
	Slides MOA01 [3.651 MB]

MOB01	The FRIB Project – Accelerator Challenges and Progress	linac, cryomodule, cavity, controls	8
	J. Wei, E.C. Bernard, N.K. Bultman, F. Casagrande, S. Chouhan, C. Compton, K.D. Davidson, A. Facco, P.E. Gibson, T . Glasmacher, L.L. Harle, K. Holland, M.J. Johnson, S. Jones, D. Leitner, M. Leitner, G. Machicoane, F. Marti, D. Morris, J.A. Nolen, J.P. Ozelis, S. Peng, J. Popielarski, L. Popielarski, E. Pozdeyev, T. Russo, K. Saito, R.C. Webber, J. Weisend, M. Williams, Y. Yamazaki, A. Zeller, Y. Zhang, Q. Zhao FRIB, East Lansing, USA D. Arenius, V. Ganni JLAB, Newport News, Virginia, USA
	Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661 The Facility for Rare Isotope Beams, a new national user facility funded by the U.S. Department of Energy Office of Science to be constructed and operated by MSU, is currently being designed to provide intense beams of rare isotopes to better understand the physics of nuclei, nuclear astrophysics, fundamental interactions, and applications for society. The FRIB driver linac can accelerate all stable isotopes to energies beyond 200 MeV/u at beam powers up to 400 kW. Key technical R&D programs include low-beta cw SRF cryomodules and highly efficient charge stripping using a liquid lithium film or helium gas. Physical challenges include acceleration of multiple charge states of beams to meet beam-on-target requirements, efficient production and acceleration of intense heavy-ion beams from low to intermediate energies, accommodation of multiple charge stripping scenarios and ion species, designs for both baseline in-flight fragmentation and ISOL upgrade options, and design considerations of machine availability, tunability, reliability, maintainability, and upgradability. We report on the FRIB accelerator design and developments with emphasis on technical challenges and progress.
	Slides MOB01 [4.891 MB]

MOB04	Argonne In-flight Radioactive Ion Separator	dipole, multipole, simulation, target	24
	S.L. Manikonda, M. Alcorta, B. Back, J.A. Nolen, R.C. Pardo, E. Rehm, G. Savard, D. Seweryniak ANL, Argonne, USA B. Erdelyi Northern Illinois University, DeKalb, Illinois, USA
	Funding: This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357 The Argonne In-flight Radioactive Ion Separator (AIRIS) is a new large recoil separator that is being designed as a part of proposed future upgrade of the ATLAS facility to provide at least 10 times more collection efficiency than the existing system. In combination with other proposed upgrades it will provide a 2 orders of magnitude gain in the intensity for the in-flight produced secondary beams compared to the existing facility. The resulting unprecedented intensities for the recoil beam open new opportunities in several physics domains, e.g. gamma ray spectroscopy after secondary reactions, reactions for rp‐, νp‐, αp‐ processes and CNO cycle. The proposed design for the AIRIS device is based on four multipole magnets and four dipole magnets arranged in a so called broadband spectrometer configuration. This arrangement will be followed by two RF cavities to provide further selection based on velocity differences between the primary beam tail and the recoiling RIB. The advantages of such a design and key parameters will be discussed. We will demonstrate the performance of the device for few representative reaction cases that can be studied using AIRIS.
	Slides MOB04 [1.626 MB]

MOB05	Rare-Isotope Beam Facilities in Asia	linac, cyclotron, heavy-ion, ISOL	28
	O. Kamigaito RIKEN Nishina Center, Wako, Japan
	Growing activities in the RIB facilities in Asian countries will be reviewed. Current status and future development will be discussed.
	Slides MOB05 [8.967 MB]

MOC01	Progress and Plans for High Mass Beam Delivery at TRIUMF	linac, rfq, ISAC, target	33
	M. Marchetto TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	ISAC is a TRIUMF facility for production and post-acceleration of radioactive ion beams (RIB). The RIBs are produced in two targets using a 500 MeV proton of up to 0.1 mA. The produced radioactive species are then ionized, extracted up to 60 kV, mass selected and transported to either the low energy experimental area or to the post-accelerators. The first stage of acceleration is accomplished via an RFQ followed by a DTL; at this medium stage the energy ranges between 0.15 MeV/u and 1.8 MeV/u for 3≤A/q≤7. The second stage of the acceleration uses a 40 MV superconducting linac for a final energy up to 18 MeV/u. High mass (>30) beams need multiple charges to be accepted by the RFQ. The single charge ions out of the target source are charge bred using an ECR charge state booster. The breeding process generates a significant amount of background contamination that masks the desired ions inside a mixed ”cocktail” beam. Such a cocktail needs to be cleaned of contaminants. An unprecedented effort is going on at TRIUMF trying to clean the high mass cocktail beams using the accelerator chain as filter. The progress and future plans of the project will be presented in this paper.
	Slides MOC01 [3.144 MB]

MOC04	Commissioning Experience with CARIBU	background, ion-source, plasma, ECR	45
	R.C. Vondrasek, S.I. Baker, P. Bertone, S. Caldwell, J.A. Clark, C.N. Davids, D. Lascar, A. Levand, K. Lister, R.C. Pardo, D. Peterson, D.R. Phillips, G. Savard, J.V. Schelt, M.G. Sternberg, T. Sun, B. Zabransky ANL, Argonne, USA
	The Californium Rare Ion Breeder Upgrade (CARIBU) of the ATLAS superconducting linac facility aims at providing low-energy and reaccelerated neutron-rich radioactive beams to address key nuclear physics and astrophysics questions. These beams are obtained from fission fragments of a Cf-252 source, thermalized and collected into a low-energy particle beam by a helium gas catcher, mass analyzed by an isobar separator, and charge bred with an ECR ion source to higher charge states for acceleration in ATLAS. Low-energy mass separated radioactive beams have been extracted, charge bred with a 10% efficiency, reaccelerated to 6 MeV/u, and delivered to GAMMASPHERE for beta decay studies. In addition, the Canadian Penning Trap (CPT) mass spectrometer has been relocated to the CARIBU low-energy beam line. Mass measurements on over 42 neutron rich nuclei have already been performed and additional measurements are underway. In addition, a new tape station for beta decay studies has just been commissioned. In this talk I will describe the current status of the overall CARIBU system and the plans for bringing the system into full operation and use in research with accelerated beams.
	Slides MOC04 [3.744 MB]

PO02	GANIL Operation Status and Upgrade of SPIRAL1	booster, target, ion-source, acceleration	51
	F. Chautard, O. Bajeat, P. Delahaye, M. Dubois, P. Jardin, O. Kamalou, L. Maunoury, G. Sénécal GANIL, Caen, France
	The GANIL facility (Caen, France) is dedicated to the acceleration of heavy ion beams for nuclear physics, atomic physics, radiobiology and material irradiation. The production of stable and radioactive ion beams for nuclear physics studies represents the main part of the activity. The exotic beams are produced by the Isotope Separation On-Line method (ISOL, the SPIRAL1 facility) with SPIRAL1 facility. It is running since 2001, producing and post-accelerating radioactive ion beams. The review of the operation from 2001 to 2011 is presented. Because of the physicist demands, the facility is about to be improved with the project Upgrade SPIRAL1. The goal of the project is to extend the range of post-accelerated exotic beams avalaible.

PO03	The RIB Dynamics of the SPIRAL 2 Transfer Line	quadrupole, solenoid, extraction, emittance	54
	D. Boutin, F.R. Osswald IPHC, Strasbourg Cedex 2, France N.Yu. Kazarinov JINR, Dubna, Moscow Region, Russia C. Peaucelle IN2P3 IPNL, Villeurbanne, France T. Thuillier LPSC, Grenoble, France
	The design of the SPIRAL 2 RIB extraction and mass analysis results of previous experiences at Ganil (SIRa) and SPIRAL* and concerns the ISOL process. The layout presents different beam sections of optical interest starting with a conventional Einzel lens, a 1 T solenoid, a triplet of magnetic quadrupoles and a magnetic dipole for the mass analysis. The down-stream 1+ ions transfer line to the users is designed following a conservative solution composed of emittance limitation, homothetic betatron matching, passive and symmetrical optical lattices (point to point and unitary transport) as well as beam instrumentation enabling the control of the losses (pepperpots, slits, beam profilers, FC, etc.). The presentation will mainly focus on the description of the beam line, its characteristics and on some side effects which have to be taken into account in order to match the beam properly during the operations. * On Line Isotopic Separator Test Benches at GANIL, R. Anne et al., PAC proceed. ed. IEEE, 1993

PO09	Progress on the RFQ Beam Cooler Design for SPES Project	rfq, emittance, vacuum, injection	68
	M.M. Maggiore, F. Chiurlotto, M. Comunian, A. Dainelli, M. De Lazzari, A. Galatà, A. Minarello, A.M. Porcellato, S. Stark INFN/LNL, Legnaro (PD), Italy
	The SPES project is the new Radioactive Ion Beam facility under construction at Laboratori Nazionali of Legnaro, Italy. In this framework in order to improve the beam quality in terms of transversa emittance and energy spread, a study of a new RFQ beam cooler device is in progress. The electromagnetic design of the RFQ section and the electrostatic layout of the injection and extraction regions have been done. The study about the beam dynamic is going on by means of dedicated codes which allow to take into account the interaction of the ions with the buffer gas needed to cool the beams. The preliminary design of the device is carrying on at LNL since 2011 and the feasibility study is funded by V committee of INFN in the framework of REGATA experiment. Both beam dynamics study and the electromagnetic design are presented in this work.

PO12	Damage Situation of the 12UD Pelletron Tandem Accelerator at the University of Tsukuba by the Great East Japan Earthquake	tandem-accelerator, ion-source, FEL, high-voltage	80
	K. Sasa UTTAC, Tsukuba, Ibaraki, Japan
	The 12UD Pelletron tandem accelerator at the University of Tsukuba suffered serious damage from the Great East Japan Earthquake on 11 March 2011. On the day, the 12UD Pelletron tandem accelerator was in operation at 8 MV. A main tank of the 12 UD Pelletron tandem accelerator located from downstairs 4th floor to 7th floor was strongly shaken by the shock of the earthquake. All high voltage accelerating columns fell down in the accelerator tank. The situation of damage and a post-quake reconstruction project of the Tandem Accelerator Facility at the University of Tsukuba will be reported.

PO17	Simulation of Electron and Ion Dynamics in an EBIS	electron, simulation, background, space-charge	97
	L. Zhao, E.G. Evstati, J.S. Kim Far-Tech, Inc., San Diego, California, USA E.N. Beebe, A.I. Pikin BNL, Upton, Long Island, New York, USA
	Funding: Grant supported by DOE office of Nuclear Physics To model the dynamics of the ions in an Electron Beam Ion Source (EBIS), a time-dependent, self-consist particle-in-cell Monte Carlo code (EBIS-PIC) has been developed by FAR-TECH, Inc. The energetic background electron beam is modeled by PBGUNS (http://www.far-tech.com/pbguns/index.html) by dividing the long beam path into several segments to resolve the big length-to-radius spatial scaling problem. The injected primary ions and ionized neutral gas ions are tracked using Monte Carlo method which includes the ionization, charge-exchange and Coulomb collisions with the electron beam and the neutral gas in the potential well, which is calculated by solving the Poisson equation each time step. EBIS-PIC has been able to predict the spatial and velocity space distributions and the evolution of the charge state distribution (CSD) of trapped ions in EBIS devices operating in fast or slow trapping mode. The physical model of EBIS-PIC code and the simulations of the trapping and charge-breeding of injected Cs+1 ions on the Test EBIS* at BNL will be presented. The simulation results have shown good consistency with the experiments. * S. Kondrashev, J.G. Alessi, E.N.Beebe, C. Dickerson, P.N.Ostroumov, A. Pikin, G. Savard, NIMPR. A, 642 (2011), 18-24.

PO18	Tandem EBIS	electron, injection, solenoid, extraction	101
	A.I. Pikin, J.G. Alessi, E.N. Beebe, M. Okamura, D. Raparia, J. Ritter, L. Snydstrup BNL, Upton, Long Island, New York, USA
	Funding: Work supported under the auspices of the US Department of Energy and the National Aeronautics and Space Administration. A method to increase the ion beam intensity of RHIC EBIS by extending its ion trap into magnetic field of an additional superconducting solenoid is described. The strong axial support of the cold masses in these solenoids is required to place them on a common axis close to each other. Such configuration of solenoids allows to produce a long EBIS with a single electron gun, electron collector and injection system. Preliminary calculations of magnetic forces, magnetic field and potential distributions are presented along with proposed structure of the ion traps.

TUA01	Heavy Ion Accelerator Development at IUAC Delhi	heavy-ion, linac, ion-source, niobium	105
	D. Kanjilal IUAC, New Delhi, India
	Inter University Accelerator Centre has been involved in the development of heavy ion accelerators, ion sources, beam lines and experimental facilities for providing various heavy ion beams in a wide energy range varying from a few tens of keV to hundreds of MeV for experiments by more than four hundred research groups from all over India and abroad. A large vertical Pelletron electrostatic tandem accelerator capable of achieving terminal voltage up to 16MV has been in operational for more than a couple of decades. Superconducting niobium linac booster accelerating modules having eight niobium quarter wave resonators each have been developed and used. A high temperature superconducting electron cyclotron resonance ion source (HTS-ECRIS) was designed, fabricated and installed. It is in regular operation for production of highly charged ion beams for alternate high current injector (HCI) system consisting of radio frequency quadrupole and drift tube Linacs. Details of developments of various heavy ion beam facilities and experimental systems at IUAC will be presented.
	Slides TUA01 [5.689 MB]

TUA02	A Cost-Effective Energy Upgrade of the ALPI Linac at INFN-Legnaro	linac, simulation, cavity, ion-source	106
	G. Bisoffi, M. Comunian, A. Facco, A. Galatà, P. Modanese, R. Pengo, A. Pisent, A.M. Porcellato, S. Stark INFN/LNL, Legnaro (PD), Italy B.B. Chalykh ITEP, Moscow, Russia
	The ALPI SC linac at INFN-LNL is being constantly upgraded in terms of maximum beam energy (Ef) and current, made available for experiments. Presently, a liquid-N cooling scheme is being applied to the RF power couplers of the 16 full Nb resonators, to keep them locked at 5 MV/m, vs. present 3 MV/m. A further upgrade of the 44 “medium beta section” cavities, changing the cavity Cu substrates, was prototyped and is reported at this conference: however it is not fully funded yet and is extremely time-consuming. A cost-effective Ef upgrade is proposed here: to move 2 SC buncher cryostats, which house a single working SC QWR but were designed for 4, at the end of ALPI, equipping them with 4 Nb/Cu QWRs each (new bunchers would either be NC QWRs or a single SC cavity cryostat). The contribution of these cryostats to Ef would be extremely effective: e.g. a Ef~10 MeV/A (Ibeam≥ 1 pnA) Pb beam, a very attractive tool for the Nuclear Physics community, is achievable. A being performed upgrade of ALPI cryoplant, expected to increase the refrigeration capability by ~25%, makes this change possible today. Details of this solutions, as well as its limits, will be presented and discussed
	Slides TUA02 [3.722 MB]

TUB01	Development of NRA System for a 1.7MV Tandem Accelerator-Human Resource Development Program for Nuclear Engineering, The University of Tokyo	electron, resonance, target, proton	115
	S. Ito, H. Matsuzaki, A. Morita The University of Tokyo, Tokyo, Japan
	The 1.7MV tandem accelerator (RAPID) at the University of Tokyo has been used for various research projects and educational studies since its installation in 1994. Recently RAPID has contributed to educational program for study by utilizing high sensitive ion beam analysis methods of the accelerator. In the fall of 2011, we newly developed a NRA (Nuclear Reaction Analysis) system with BGO scintillator. Detecting the resonant reaction 19F (p, αγ) 16O, a special student experimental class was successfully performed as a “Human resource development program for nuclear engineering”. The feature of this experiment is very few in advanced case study, which has performed with combine multiple ion beam correspond to a purpose for experiment. In this program students make their own samples for NRA analysis by ion implantation. Later in the year, RAPID will be relocated to the University of Tokyo (HIT facility) in Ibaraki prefecture to replace the 1MV tandem accelerator which was damaged by the Great East Japan Earthquake on March of 2011.
	Slides TUB01 [1.426 MB]

TUB02	New Developments at the Tandem Accelerators Laboratory at IFIN-HH	ion-source, tandem-accelerator, controls, vacuum	118
	D.G. Ghita, I.C. Calinescu, S. Dobrescu, N.M. Marginean, I.O. Mitu, T.B. Sava, B. Savu IFIN, Magurele- Bucuresti, Romania Gh. Cata-Danil, M.S. Dogaru, M. Enachescu, M.M. Gugiu, P. Ionescu, D.V. Mosu, A. Pantelica, D. Pantelica, A. Petre, I. Popescu, C.A. Simion, C. Stan-Sion, M. Statescu, N.V. Zamfir Horia Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania
	The upgrade of the 9 MV Tandem accelerator at IFIN-HH started in 2007. Remarkable improvements were done in the last 5 years that can be seen in the improved performance and reliability of the machine. Using original preparation techniques, some new beam species were tested for the first time in our laboratory. This opened the door to new experiments. A major improvement for the laboratory is the installation of 1 MV Tandetron accelerator dedicated to ultra-sensitive AMS measurements of C-14, Be-10, Al-26 and I-129, and 3 MV Tandetron accelerator dedicated to ion beam analysis. The main directions of the research activity in the laboratory will be shortly presented.
	Slides TUB02 [3.686 MB]

TUB03	Terminal Voltage Stabilization of Pelletron Tandem Accelerator	controls, feedback, acceleration, electron	124
	N.R. Lobanov, M.C. Blacksell, P. Linardakis, D. Tsifakis Research School of Physics and Engineering, Australian National University, Canberra, Australia
	Funding: Heavy Ion Accelerators Education Investment Fund (EIF) A conventional corona control terminal voltage stabiliser has been investigated on the ANU 14UD tandem accelerator. The fluctuations in the charge transport of electrostatic pelletron generator and their correlation with mechanical oscillations of the chains and terminal voltage ripple have been analysed. Emphasis is placed on the performance of the two-loop feedback system and on the tuning of this system to production of high energy-resolution beams. The transfer function for the corona regulation loop has been determined and examined. The system produces the beam position at the image slit of the 90 energy-analysing magnet with long-term stability equivalent to a few hundred volts rms fluctuation of the terminal voltage. The concept of novel fast control loop utilizing the high-frequency component from the image slits to control the voltage of the last gap of high-energy acceleration tube is discussed.
	Slides TUB03 [4.693 MB]

TUC01	Physical Design of the SPES Facility	rfq, target, plasma, linac	136
	M. Comunian INFN/LNL, Legnaro (PD), Italy
	SPES (Selective Production of Exotic Species) is the Italian project for a radioactive ion beam (RIB) facility based on a cyclotron as primary accelerator and on the existing superconducting linac ALPI as post accelerator. The cyclotron, energy up to 70 MeV and total current of 0.75 mA, shared on two exits, is in construction in the industry. The production of neutron-rich radioactive nuclei, with ISOL technique, employs the proton induced fission on a direct target of UCx; the fission rate expected with a proton beam of 40 MeV and 0.2 mA, is 10¹3 fissions/s. The main goal of physical design of the SPES facility is to provide an accelerator system to perform forefront research in nuclear physics by studying nuclei far from stability, in particular neutron-rich radioactive nuclei with masses in the range of 80–160. The final RIB energy on the experimental target will be up to 11 MeV/A for A = 130, with an intensity in the range of 10⁷–10⁹ pps.
	Slides TUC01 [5.313 MB]

TUC02	KEK Digital Accelerator and Recent Beam Commissioning Result	injection, acceleration, induction, kicker	143
	K. Takayama, T. Adachi, T. Arai, D.A. Arakara, E. Kadokura, T. Kawakubo, T. Kubo, H. Nakanishi, K. Okamura, H. Someya, A. Takagi, M. Wake KEK, Ibaraki, Japan H. Asao, Y. Okada NETS, Fuchu-shi, Japan Y. Barata, S. Harada Tokyo City University, Tokyo, Japan T. Iwashita, K. Okazaki Nippon Advanced Technology Co. Ltd., Ibaraki-prefecture, Japan K.W. Leo Sokendai, Ibaraki, Japan X. Liu, T. Yoshimoto TIT, Yokohama, Japan
	The digital accelerator (DA), which is a small-scale induction synchrotron "" requiring no high-energy injector and capable of providing various ions, was constructed at KEK"". Beam commissioning has been carried out. The KEK-DA consists of a 200 kV high voltage terminal, in which a permanent mag. x-band ECRIS is embedded, 15 m long LEBT, ES injection kicker, and a 10 Hz rapid cycle synchrotron equipped with the induction acceleration system. An ion pulse chopped in 5 micro-sec by the newly developed Marx generator driven Einzel lens chopper"*" was guided through the LEBT and injected by the kicker in one turn. 3 micro-sec ion pulse was successfully captured with a pair of barrier voltage-pulses of 2 kV and accelerated up to 12 MeV with another flat induction-acceleration voltage-pulse through an acceleration period of 50 msec. Beam commissioning started with a He¹⁺ ion beam of 100 microA. Details of fully digital-controlled barrier bucket trapping and induction acceleration are described, although the acceleration/extraction is still at a preliminary stage. Some of unique applications, such as laboratory space science using virtual cosmic rays, will be introduced. K.Takayama and R.J.Briggs (Eds), “Induction Accelerators”, (Springer, 2010). T. Iwashita et al., Phys. Rev. ST-AB 14, 071301 (2011). * T.Adachi et al., Rev. Inst. Meth. 82, 083305 (2011).
	Slides TUC02 [2.126 MB]

TUC03	Laser Ablation of Solids into an Electron Cyclotron Resonance Ion Sources for Accelerator Mass Spectroscopy	laser, ECR, target, plasma	149
	T. Palchan, F.G. Kondev, S.A. Kondrashev, C. Nair, R.C. Pardo, R.H. Scott, R.C. Vondrasek ANL, Argonne, USA W. Bauder, P. Collon University of Notre Dame, Indiana, USA J.F. Berg, T. Maddock, G. Palmotti, G. Youinou INL, Idaho Falls, Idaho, USA G. Imel ISU, Pocatello, Idaho, USA M. Paul The Hebrew University of Jerusalem, The Racah Institute of Physics, Jerusalem, Israel M. Salvatores CEA Cadarache, Saint Paul Lez Durance, France
	Funding: This work is supported by the U.S. Department of Energy, Office of Nuclear Physics, under contract No. DE-AC02-06CH11357. A project using accelerator mass spectrometry (AMS) is underway at the ATLAS facility to measure the atom densities of transmutation products present in samples irradiated in the Advanced Test Reactor at INL. These atom densities will be used to infer effective actinide neutron capture cross-sections ranging from Thorium to Califorium isotopes in different neutron spectra relevant to advanced fuel cycles. This project will require the measurement of many samples with high precision and accuracy. The AMS technique at ATLAS is based on production of highly-charged positive ions in an ECRIS followed by injection into a linear accelerator. We use a picosecond laser to ablate the actinide material into the ion source. We expect that the laser ablation technique will have higher efficiency and lower chamber contamination than sputtering or oven evaporation thus reducing ‘cross talk’ between samples. In addition a multi-sample holder/changer is part of the project to allow for a quick change between multiple samples. The results of off-line ablation tests and first results of a beam generated by the laser coupled to the ECR will be discussed as well as the overall project schedule.
	Slides TUC03 [1.610 MB]

TUC04	Experiences and Lessons Learned at CARIBU with an Open 252Cf Source	controls, monitoring, neutron	155
	S.I. Baker, J.P. Greene, A. Levand, R.C. Pardo, G. Savard, R.C. Vondrasek, L.W. Weber ANL, Argonne, USA
	Funding: This work is supported by the U.S. Department of Energy, Office of Nuclear Physics, under contract No. DE-AC02-06CH11357. The CARIBU (the CAlifornium Rare Ion Breeder Upgrade) project at ATLAS is based on the creation of beams of neutron-rich nuclei produced as fission fragments from the 3% fission branch that occurs naturally in the decay of Cf-252. These fission fragments are thermalized in ultrapure helium gas and turned into a charged beam for use by the ATLAS accelerator or ‘stopped’ beam experiments. This requires a very thin source, electroplated on a stainless steel or platinum backing so that the fission fragments escape into the helium gas and are efficiently thermalized and collected into an ion beam. The information learned from the successive use of two sources with strengths of 2 mCi and 100 mCi has now prepared us for the installation in mid-summer of a 500 mCi source recently produced by Oak Ridge National Laboratory. This paper will describe the radiological monitoring system and our experience with the two weak “open” sources which have exercised and tested our radiological controls, emissions monitors, and procedures for the CARIBU facility and the source transfer area.
	Slides TUC04 [1.605 MB]

WEA01	Advanced Accelerator Technology Aspects for Hadron Therapy	proton, synchrotron, cyclotron, extraction	156
	L. Falbo CNAO Foundation, Milan, Italy
	Nowadays cancer can be considered as one of the wide spread diseases all around the world. Radiotherapy is the clinical technique used in 40% of cancer treatments: nowadays about 40% of the 18000 particle accelerators running in the world are devoted to radiotherapy. Classical radiotherapy employs photons and electrons that damage not only the diseased cells but also the healthy ones. Hadrontherapy is a high-precision radiotherapy exploiting the depth-dose deposition characteristics of the hadron particles. The realization of machines for hadrontherapy is more challenging than for standard radiotherapy: while most of hospitals have a device for classical radiotherapy, the hadrontherapy needs a dedicated building with the needed technology for the hadron acceleration. The first hadrontherapy treatments have been performed in particle physics research centers clinically adapted; nowadays there are dedicated facilities designed and built as hadrontherapy centers. This paper will give an overview on the existing hadrontherapy centers presenting the technologic background that is at the basis of the hadrontherapy world.
	Slides WEA01 [4.493 MB]

WEA02	Focusing of Intense Heavy Ion Beams with Plasma Lenses	electron, focusing, plasma, heavy-ion	163
	O. Meusel, M. Droba, U. Ratzinger, K. Schulte IAP, Frankfurt am Main, Germany
	Gabor lenses are a special type of plasma lens using a stable confined electron cloud for beam focusing. The electrons provide space charge neutralization of the beam traveling through the lens volume. At the same time a radial symmetric electrostatic self field focuses the beam mass independently. It is possible to control the density and distribution of the confined electrons providing variable focusing strength and moderate emittance growth of the beam. The knowledge of the behavior of the electron column inside this lens type is essential to understand the impact on beam transport. Therefore several diagnostic tools were developed to measure the electron cloud properties with and without ion beam propagation through Gabor lenses. Based on experimental results a new Gabor plasma lens has been designed for focusing heavy ion beams. A comparison of this lens type and a superconducting solenoid is planned at the low energy transport section of the GSI - High Current Test Injector (HOSTI).
	Slides WEA02 [1.572 MB]

WEB01	Electron Beam Ion Sources, Traps, and Strings: Versatile Devices to Meet the High Charge State Ion Needs of Modern Facilities	electron, ion-source, heavy-ion, collider	164
	E.N. Beebe, J.G. Alessi, A.I. Pikin BNL, Upton, Long Island, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy, and by the National Aeronautics and Space Administration Electron beam ion sources (EBIS) and its variants such as the electron beam ion trap (EBIT) and electron string ion source (ESIS) have been selected to provide highly charged ions for several atomic and nuclear physics facilities. Since the capture and breeding can be short and highly efficient, EBIST devices are increasingly being chosen for trapping and/or reacceleration of radioactive beams. The sources can range from petite to grand, using electron beams from ~1mA to 10A or more. They often serve accelerators and beam lines in large laboratories but they can be self contained laboratories where experiments are made in situ. We will discuss the basic principles as well as applications of these sources at various facilities around the world. Some emphasis will be placed on the recently commissioned RHIC EBIS source which is now providing beams for both high energy physics at the relativistic heavy ion collider as well as the NASA space radiation laboratory at BNL.
	Slides WEB01 [2.850 MB]

WEB02	Commissioning of CARIBU EBIS Charge Breeder Sub-systems	gun, electron, cathode, solenoid	165
	S.A. Kondrashev, C. Dickerson, A. Levand, P.N. Ostroumov, R.C. Vondrasek ANL, Argonne, USA M.A. Batazova, G.I. Kuznetsov BINP SB RAS, Novosibirsk, Russia A.I. Pikin BNL, Upton, Long Island, New York, USA
	Funding: This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under contract number DE-AC02-06CH11357. A high-efficiency charge breeder based on an Electron Beam Ion Source (EBIS) to increase the intensity and improve the purity of accelerated neutron-rich radioactive ion beams is being developed by the ANL Physics Division. The design of the EBIS charge breeder is complete and manufacturing of the components and sub-systems is in progress. A 6-Tesla superconducting solenoid and a high-perveance electron gun were recently delivered and successfully commissioned. The current status of the ANL EBIS development and commissioning results of different EBIS sub-systems will be presented.
	Slides WEB02 [1.219 MB]

WEB03	DREEBIT EBIS/T for Applications in Accelerator Physics	ion-source, electron, target, injection	170
	M. Schmidt, A. Thorn DREEBIT GmbH, Dresden, Germany G. Zschornack Technische Universität Dresden, Institut für Angewandte Physik, Dresden, Germany
	Funding: Supported by the European Regional Development Fund (ERDF) and the German Federal Ministry of Economics and Technology Electron Beam Ion Sources and Traps provide light up to heavy ions of low up to high charge states for various applications in accelerator physics such as medical particle therapy and charge breeding. Beside the well-known but quiet costly superconducting EBIS/T type systems compact and permanent magnet-operated EBIS/T from the DREEBIT Company are available, favorable for low-budget projects. Moreover, the "flagship" of the DREEBIT ion source family, the superconducting EBIS-SC features operating parameters comparable to the complex and expensive systems in the EBIS/T community.
	Slides WEB03 [3.655 MB]
	Poster WEB03 [7.892 MB]

WEB04	Electron and Ion Beam Dynamics in the CARIBU EBIS Charge Breeder	electron, simulation, ion-source, acceleration	172
	C. Dickerson, S.A. Kondrashev, B. Mustapha, P.N. Ostroumov ANL, Argonne, USA A.I. Pikin BNL, Upton, Long Island, New York, USA
	Funding: This work is supported by the U.S. Department of Energy, Office of Nuclear Physics, under contract number DE-AC02-06CH11357. An Electron Beam Ion Source (EBIS) is being built to charge breed ion beams from the Californium Rare Isotope Breeder Upgrade (CARIBU) for acceleration in the Argonne Tandem Linear Accelerator System (ATLAS) at Argonne National Laboratory (ANL). The overall efficiency of the source and charge breeder system is important since CARIBU will produce many low intensity radioactive ion species. Simulations of the electron and ion beam dynamics have been used to determine the system’s expected performance. The details of these simulations and results will be presented.
	Slides WEB04 [1.362 MB]

WEB05	ECRIS Latest Developments	electron, ECRIS, ion-source, plasma	173
	L. Celona, G. Castro, S. Gammino, D. Mascali INFN/LNS, Catania, Italy G. Ciavola CNAO Foundation, Milan, Italy
	The production of intense beams of highly charged ions (HCI) is one of the most relevant challenge for the future accelerator facilities. Electron Cyclotron Resonance Ion Sources (ECRIS) are nowadays the most powerful devices able to feed accelerators with HCI in a reliable and efficient way. The reliability of frontier solutions for magnets and the increased costs for microwave generators make scaling to larger frequency not viable. Any further improvement of ECRIS output currents and average charge state requires a deep understanding of electron and ion dynamics in the plasma. In the past 20 years different teams have been working in the forefront of ion source developments with both experimental and theoretical activities, proposing different solutions to improve the production rate. The paper will discuss the most recent technological developments in the field, worldwide, together with the modeling issues of non-classical evidences like sensitivity of Electron Energy Distribution Function to the magnetic field detuning, influence of plasma turbulences on electron heating and ion confinement, coupling between electron and ion dynamics and relative impact on the formed ion beam.

WEC03	The SC CW LINAC Demonstrator – 1st Test of an SC CH-cavity with Heavy Ions	cavity, linac, solenoid, heavy-ion	182
	S. Mickat, L.A. Dahl GSI, Darmstadt, Germany M. Amberg, K. Aulenbacher, W.A. Barth, V. Gettmann, S. Mickat HIM, Mainz, Germany D. Bänsch, F.D. Dziuba, D. Mäder, H. Podlech, U. Ratzinger, R. Tiede IAP, Frankfurt am Main, Germany
	The superconducting (sc) continuous wave (cw) LINAC Demonstrator is a collaboration project between GSI, the Helmholtz Institute Mainz (HIM), and the Institute for Applied Physics (IAP) at the Goethe University Frankfurt. The aim is a full performance test of a 217 MHz sc Crossbar H-mode (CH) cavity, which provides gradients of 5.1 MV/m at a total length of 0.69 m. In addition the Demonstrator comprises two 9.3 Tesla sc solenoids. The configuration of a CH-cavity embedded by two sc solenoids is taken from a conceptual layout of a new sc cw LINACwith nine CH-cavities and seven solenoids. Such an accelerator is highly desired by a broad community of users requesting heavy ion beam energies in the Coulomb barrier range. A successful test of such an sc multigap structure are an important milestone towards the proposed cw-LINAC.
	Slides WEC03 [1.842 MB]

WEC05	Design Studies for a New Heavy Ion Injector Linac for FAIR	linac, heavy-ion, injection, acceleration	191
	B. Schlitt, W.A. Barth, G. Clemente, W. Vinzenz GSI, Darmstadt, Germany
	As the GSI UNILAC started operation in 1975, it will be more than 40 years old when the commissioning of the future Facility for Antiproton and Ion Research (FAIR) at GSI will start. To assure reliable operation for FAIR and to provide beams for a variety of experiments, three separate linacs are proposed: 1.) A new superconducting cw heavy-ion linac behind the upgraded high charge state injector HLI shall provide ion beams with high duty cycle and adjustable energy in the MeV/u region for the super-heavy element program as well as for further UNILAC experiments. 2.) A dedicated 70 MeV proton linac will serve as injector for the FAIR pbar physics program. 3.) To deliver high-intensity heavy-ion beams for FAIR, the existing post-stripper linac should be replaced by a new high energy linac with short beam pulses, low pulse repetition rate, and fixed end energy. Conceptual design studies for the latter machine using 10⁸ MHz IH-type drift tube structures will be presented, including a proposal to increase the ion charge states for synchrotron injection as well as a linac beam energy upgrade using 325 MHz CH structures.
	Slides WEC05 [6.013 MB]

THA01	Heavy Ion Superconducting Linacs: Status and Upgrade Projects	linac, heavy-ion, status	196
	P.N. Ostroumov ANL, Argonne, USA
	Funding: This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under contract number DE-AC02-06CH11357. We observe that there is an increase in the demand, by the scientific community, for accelerated CW ion beams which can be efficiently provided by SC ion linacs. This demand can be categorized into two areas: existing and new facilities. Existing facilities are being refurbished and upgraded for higher energies and beam intensities. Several new projects are under development or construction worldwide. Recently, development of new SC ion linacs has started in China, Korea and Spain. In this talk I will briefly review both the upgrade and new SC ion linac projects with a primary focus on the advances in heavy-ion linac technologies achieved at ANL in connection with the efficiency and intensity upgrade of ATLAS.
	Slides THA01 [3.981 MB]

THA03	Status and Upgrade Project of HIRFL	heavy-ion, linac, DTL, rfq	198
	G.Q. Xiao, Y. He, X. Ma, M.T. Song, J.W. Xia, H.S. Xu, J.C. Yang, Y.J. Yuan, H.W. Zhao, X. Zhou IMP, Lanzhou, People's Republic of China
	Heavy Ion Research Facility at Lanzhou is a heavy ion accelerator complex for nuclear, atomic, and biology application research activities. It is the biggest heavy ion accelerator facility in China, consisting two cyclotrons in series as injector and two cooling storage rings (CSRm and CSRe) as main synclotron and experimental spectrum separately. The species from P to U were accelerated in the machine, And the maximum energy is 1 GeV/u for C. The experimetal teminals are on meterial, biology, canser therapy, SHE, RIB, mass measurement, inner target, and so on. To improve beam intensity and available beam time, a linear injectors SSC-LINAC were proposed in 2009. It consists a 4-rod RFQ and 4 IH-DTL tanks. The RFQ, IH-DTL, and 60 kW solid state amplifier for SSC-LINAC are tested priliminaryly. The operation status and progress of upgrade projects of HIRFL are presented in the paper.
	Slides THA03 [6.806 MB]

THB01	New Developments in Low-Z Gas Stripper Sstem at RIKEN Radioactive Isotope Beam Factory (RIBF)	electron, acceleration, target, cyclotron	199
	H. Okuno, N. Fukunishi, H. Hasebe, H. Imao, O. Kamigaito, M. Kase, H. Kuboki RIKEN Nishina Center, Wako, Japan
	Electron stripping process from heavy ion in material is a useful tool in accelerator complex to give higher charge state of the ion, allowing its effective acceleration. This process is competed with electron capture process and reach to the equilibrium charge state. Carbon foils is convenient for charge stripper but have short lifetime due to thermal stress and sputtering in the case of high power beam of heavy ion such as uranium. Gas is basically free from lifetime but gives lower charge state due to absent of density effect. Therefore, charge stripper especially for uranium beams at 10^-20 MeV/u could be a bottle-neck problem in high power heavy ion facility such as RIBF, FRIB and FAIR. A charge stripper using low-Z gas (He or H2) is an important candidate to solve the problem because the high equilibrium mean charge states for the low-Z gas stripper are expected due to the suppression of the electron capture process. This presenation will describe the results for the develeopments and tests of He gas stripper for uranium beams at 11 MeV/u.
	Slides THB01 [7.108 MB]

THB03	Design Sudy for Front-End System at Rare Isotope Science Project (RISP)	rfq, ECR, emittance, simulation	207
	E.-S. Kim KNU, Deagu, Republic of Korea J. Bahng, J.G. Hwang, S.W. Jang Kyungpook National University, Daegu, Republic of Korea B. Choi, D. Jeon, B. Kim, H. Kim, S.K. Kim IBS, Daejeon, Republic of Korea
	Heavy ion beams of 400 kW and 70 kW are generated at the RISP by in-flight and ISOL methods, respectively. Front-End system in the RISP consists of 28 GHz superconducting ECR-IS with 10 keV/u, LEBT with two-bends and a multi-harmonic buncher, a RFQ with 81.25 MHz and 300 keV/u, and MEBT with two re-bunchers. The design studies have been performed to optimize the beam and accelerator parameters to meet the required design goals. It is shown that the front-end simulations results can provide the two-charge state beams up to uranium to upstream linac with the required beam emittances. In this paper, we present the design results for the front-end system and on the beam dynamics.
	Slides THB03 [1.942 MB]

THB04	Development of the Intensity and Quality of the Heavy Ion Beams at GSI	rfq, emittance, vacuum, injection	211
	L.A. Dahl, W.A. Barth, M.C. Bellachioma, L. Groening, O.K. Kester, M.M. Kirk, D. Ondreka, N. Pyka, P.J. Spiller, J. Stadlmann, H. Vormann, S.G. Yaramyshev GSI, Darmstadt, Germany L.H.J. Bozyk, Y. El-Hayek FIAS, Frankfurt am Main, Germany C. Xiao IAP, Frankfurt am Main, Germany
	For injection into the future FAIR SIS100 synchrotron the GSI linear accelerator UNILAC and synchrotron SIS18 have to provide 1.5·1011 p/spill for the reference U²⁸⁺ beam. The MeVVa ion source extracts 37 emA of U⁴⁺ beam. For improved transmission the RFQ vanes were revised and exchanged. A new ion source terminal with straightforward beam injection into the RFQ is calculated and partly realized for loss free beam transport to the RFQ. To improve the quality of the space charge dominated beam in the DFFD periodic focussing Alvarez section a transverse 4th order resonance was investigated by simulations and experimentally. The multi turn beam injection into the SIS18 requires emittances below βγεx/βγεy=0.8/2.5 [μm]. This suggests introducing a new concept for emittance transfer by solenoidal stripping. A set-up for experimental proof of principle will be installed at the foil stripper. The SIS18 has been equipped with NEG-coated chambers for all magnets and the injection septum. Newly installed ion catchers improve especially the dynamic vacuum pressure. The effect on progress in beam quality development and intensity will be reported.
	Slides THB04 [9.809 MB]

THB05	The HITRAP Decelerator and Beam Instrumentation	rfq, electron, diagnostics, instrumentation	217
	F. Herfurth, Z. Andjelkovic, W.A. Barth, K. Brantjes, G. Clemente, L.A. Dahl, S. Fedotova, P. Gerhard, M. Kaiser, O.K. Kester, H.J. Kluge, C. Kozhuharov, M.T. Maier, D. Neidherr, W. Quint, A. Reiter, T. Stöhlker, G. Vorobjev, S.G. Yaramyshev GSI, Darmstadt, Germany U. Ratzinger, A. Schempp IAP, Frankfurt am Main, Germany
	A linear decelerator is being commissioned for heavy, highly-charged ions (HCI) at GSI in Darmstadt/Germany. HCI with only one or few electrons are interesting systems for many different experiments as for instance precision tests of the theory of quantum electrodynamics (QED). In order to transform heavy HCI produced at 400 MeV/u to stored and cooled HCI at low energy the linear decelerator facility HITRAP has been setup behind the experimental storage ring (ESR). The ions are decelerated in the ESR from 400 to 4 MeV/u, cooled and extracted. The ions are then matched to an IH-structure using a double drift buncher, decelerated from 4 to 0.5 MeV/u in the IH, and then down to 6 keV/u in a 4-rod RFQ. To detect and analyze the weak and sparse ion bunches a new type of energy analyzing detector has been developed along with improvements to other “standard” beam instrumentation. One million highly charged ions have been decelerated with the IH from 400 MeV/u to about 0.5 MeV/u per cycle. The RFQ has shown in off-line tests to decelerate ions, however, the measured acceptance does not fit the ion beam from the IH. This requires a refined design, which is underway.
	Slides THB05 [2.925 MB]

Paper

Title

Other Keywords

Page

MOA01

Frontier Technologies and Future Directions in High Intensity ISOL RIB Production

target, proton, ISOL, vacuum

1

P.G. Bricault, F. Ames, N. Bernier, M. Dombsky, P. Kunz, F.S. Labrecque, J. Lassen, A. Mjøs, M. Nozar, J. Wong
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

Funding: TRIUMF is funded by a contribution from the federal government through the National Research Council of Canada
The future frontier of the ISOL technique is to increase the intensity of the RIB beams. In the ISOL technique there are several ways to increase substantially the production of rare isotope beam. The most expedient one is to increase the incident beam on target. Increasing the overall release efficiency and ionization efficiency are the other two easiest ways to increase the overall RIB intensity. Now with the TRIUMF/ISAC facility the ISOL RIB facility can operate routinely up to 50 kW, this is 100 μA on target. But, the driver beam intensity cannot increase without considering the radiation damage issues and the challenge to the ion source itself where ionization efficiency are dramatically affected by target out-gazing. The other technology challenge for the ISOL technique is the target material itself. The main concern is the capability of the target material to sustain high power density deposited by the driver beam. Refractory metals foil target are suitable but nevertheless very limited in the available species we can produce with those targets. Composite targets, either for carbide and oxide target material were developed at ISAC that can sustain very high power density.

Slides MOA01 [3.651 MB]

MOB01

The FRIB Project – Accelerator Challenges and Progress

linac, cryomodule, cavity, controls

8

J. Wei, E.C. Bernard, N.K. Bultman, F. Casagrande, S. Chouhan, C. Compton, K.D. Davidson, A. Facco, P.E. Gibson, T . Glasmacher, L.L. Harle, K. Holland, M.J. Johnson, S. Jones, D. Leitner, M. Leitner, G. Machicoane, F. Marti, D. Morris, J.A. Nolen, J.P. Ozelis, S. Peng, J. Popielarski, L. Popielarski, E. Pozdeyev, T. Russo, K. Saito, R.C. Webber, J. Weisend, M. Williams, Y. Yamazaki, A. Zeller, Y. Zhang, Q. Zhao
FRIB, East Lansing, USA
D. Arenius, V. Ganni
JLAB, Newport News, Virginia, USA

Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661
The Facility for Rare Isotope Beams, a new national user facility funded by the U.S. Department of Energy Office of Science to be constructed and operated by MSU, is currently being designed to provide intense beams of rare isotopes to better understand the physics of nuclei, nuclear astrophysics, fundamental interactions, and applications for society. The FRIB driver linac can accelerate all stable isotopes to energies beyond 200 MeV/u at beam powers up to 400 kW. Key technical R&D programs include low-beta cw SRF cryomodules and highly efficient charge stripping using a liquid lithium film or helium gas. Physical challenges include acceleration of multiple charge states of beams to meet beam-on-target requirements, efficient production and acceleration of intense heavy-ion beams from low to intermediate energies, accommodation of multiple charge stripping scenarios and ion species, designs for both baseline in-flight fragmentation and ISOL upgrade options, and design considerations of machine availability, tunability, reliability, maintainability, and upgradability. We report on the FRIB accelerator design and developments with emphasis on technical challenges and progress.

Slides MOB01 [4.891 MB]

MOB04

Argonne In-flight Radioactive Ion Separator

dipole, multipole, simulation, target

24

S.L. Manikonda, M. Alcorta, B. Back, J.A. Nolen, R.C. Pardo, E. Rehm, G. Savard, D. Seweryniak
ANL, Argonne, USA
B. Erdelyi
Northern Illinois University, DeKalb, Illinois, USA

Funding: This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357
The Argonne In-flight Radioactive Ion Separator (AIRIS) is a new large recoil separator that is being designed as a part of proposed future upgrade of the ATLAS facility to provide at least 10 times more collection efficiency than the existing system. In combination with other proposed upgrades it will provide a 2 orders of magnitude gain in the intensity for the in-flight produced secondary beams compared to the existing facility. The resulting unprecedented intensities for the recoil beam open new opportunities in several physics domains, e.g. gamma ray spectroscopy after secondary reactions, reactions for rp‐, νp‐, αp‐ processes and CNO cycle. The proposed design for the AIRIS device is based on four multipole magnets and four dipole magnets arranged in a so called broadband spectrometer configuration. This arrangement will be followed by two RF cavities to provide further selection based on velocity differences between the primary beam tail and the recoiling RIB. The advantages of such a design and key parameters will be discussed. We will demonstrate the performance of the device for few representative reaction cases that can be studied using AIRIS.

Slides MOB04 [1.626 MB]

MOB05

Rare-Isotope Beam Facilities in Asia

linac, cyclotron, heavy-ion, ISOL

28

O. Kamigaito
RIKEN Nishina Center, Wako, Japan

Growing activities in the RIB facilities in Asian countries will be reviewed. Current status and future development will be discussed.

Slides MOB05 [8.967 MB]

MOC01

Progress and Plans for High Mass Beam Delivery at TRIUMF

linac, rfq, ISAC, target

33

M. Marchetto
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

ISAC is a TRIUMF facility for production and post-acceleration of radioactive ion beams (RIB). The RIBs are produced in two targets using a 500 MeV proton of up to 0.1 mA. The produced radioactive species are then ionized, extracted up to 60 kV, mass selected and transported to either the low energy experimental area or to the post-accelerators. The first stage of acceleration is accomplished via an RFQ followed by a DTL; at this medium stage the energy ranges between 0.15 MeV/u and 1.8 MeV/u for 3≤A/q≤7. The second stage of the acceleration uses a 40 MV superconducting linac for a final energy up to 18 MeV/u. High mass (>30) beams need multiple charges to be accepted by the RFQ. The single charge ions out of the target source are charge bred using an ECR charge state booster. The breeding process generates a significant amount of background contamination that masks the desired ions inside a mixed ”cocktail” beam. Such a cocktail needs to be cleaned of contaminants. An unprecedented effort is going on at TRIUMF trying to clean the high mass cocktail beams using the accelerator chain as filter. The progress and future plans of the project will be presented in this paper.

Slides MOC01 [3.144 MB]

MOC04

Commissioning Experience with CARIBU

background, ion-source, plasma, ECR

45

R.C. Vondrasek, S.I. Baker, P. Bertone, S. Caldwell, J.A. Clark, C.N. Davids, D. Lascar, A. Levand, K. Lister, R.C. Pardo, D. Peterson, D.R. Phillips, G. Savard, J.V. Schelt, M.G. Sternberg, T. Sun, B. Zabransky
ANL, Argonne, USA

The Californium Rare Ion Breeder Upgrade (CARIBU) of the ATLAS superconducting linac facility aims at providing low-energy and reaccelerated neutron-rich radioactive beams to address key nuclear physics and astrophysics questions. These beams are obtained from fission fragments of a Cf-252 source, thermalized and collected into a low-energy particle beam by a helium gas catcher, mass analyzed by an isobar separator, and charge bred with an ECR ion source to higher charge states for acceleration in ATLAS. Low-energy mass separated radioactive beams have been extracted, charge bred with a 10% efficiency, reaccelerated to 6 MeV/u, and delivered to GAMMASPHERE for beta decay studies. In addition, the Canadian Penning Trap (CPT) mass spectrometer has been relocated to the CARIBU low-energy beam line. Mass measurements on over 42 neutron rich nuclei have already been performed and additional measurements are underway. In addition, a new tape station for beta decay studies has just been commissioned. In this talk I will describe the current status of the overall CARIBU system and the plans for bringing the system into full operation and use in research with accelerated beams.

Slides MOC04 [3.744 MB]

PO02

GANIL Operation Status and Upgrade of SPIRAL1

booster, target, ion-source, acceleration

51

F. Chautard, O. Bajeat, P. Delahaye, M. Dubois, P. Jardin, O. Kamalou, L. Maunoury, G. Sénécal
GANIL, Caen, France

The GANIL facility (Caen, France) is dedicated to the acceleration of heavy ion beams for nuclear physics, atomic physics, radiobiology and material irradiation. The production of stable and radioactive ion beams for nuclear physics studies represents the main part of the activity. The exotic beams are produced by the Isotope Separation On-Line method (ISOL, the SPIRAL1 facility) with SPIRAL1 facility. It is running since 2001, producing and post-accelerating radioactive ion beams. The review of the operation from 2001 to 2011 is presented. Because of the physicist demands, the facility is about to be improved with the project Upgrade SPIRAL1. The goal of the project is to extend the range of post-accelerated exotic beams avalaible.

PO03

The RIB Dynamics of the SPIRAL 2 Transfer Line

quadrupole, solenoid, extraction, emittance

54

D. Boutin, F.R. Osswald
IPHC, Strasbourg Cedex 2, France
N.Yu. Kazarinov
JINR, Dubna, Moscow Region, Russia
C. Peaucelle
IN2P3 IPNL, Villeurbanne, France
T. Thuillier
LPSC, Grenoble, France

The design of the SPIRAL 2 RIB extraction and mass analysis results of previous experiences at Ganil (SIRa) and SPIRAL* and concerns the ISOL process. The layout presents different beam sections of optical interest starting with a conventional Einzel lens, a 1 T solenoid, a triplet of magnetic quadrupoles and a magnetic dipole for the mass analysis. The down-stream 1+ ions transfer line to the users is designed following a conservative solution composed of emittance limitation, homothetic betatron matching, passive and symmetrical optical lattices (point to point and unitary transport) as well as beam instrumentation enabling the control of the losses (pepperpots, slits, beam profilers, FC, etc.). The presentation will mainly focus on the description of the beam line, its characteristics and on some side effects which have to be taken into account in order to match the beam properly during the operations.
* On Line Isotopic Separator Test Benches at GANIL, R. Anne et al., PAC
proceed. ed. IEEE, 1993

PO09

Progress on the RFQ Beam Cooler Design for SPES Project

rfq, emittance, vacuum, injection

68

M.M. Maggiore, F. Chiurlotto, M. Comunian, A. Dainelli, M. De Lazzari, A. Galatà, A. Minarello, A.M. Porcellato, S. Stark
INFN/LNL, Legnaro (PD), Italy

The SPES project is the new Radioactive Ion Beam facility under construction at Laboratori Nazionali of Legnaro, Italy. In this framework in order to improve the beam quality in terms of transversa emittance and energy spread, a study of a new RFQ beam cooler device is in progress. The electromagnetic design of the RFQ section and the electrostatic layout of the injection and extraction regions have been done. The study about the beam dynamic is going on by means of dedicated codes which allow to take into account the interaction of the ions with the buffer gas needed to cool the beams. The preliminary design of the device is carrying on at LNL since 2011 and the feasibility study is funded by V committee of INFN in the framework of REGATA experiment. Both beam dynamics study and the electromagnetic design are presented in this work.

PO12

Damage Situation of the 12UD Pelletron Tandem Accelerator at the University of Tsukuba by the Great East Japan Earthquake

tandem-accelerator, ion-source, FEL, high-voltage

80

K. Sasa
UTTAC, Tsukuba, Ibaraki, Japan

The 12UD Pelletron tandem accelerator at the University of Tsukuba suffered serious damage from the Great East Japan Earthquake on 11 March 2011. On the day, the 12UD Pelletron tandem accelerator was in operation at 8 MV. A main tank of the 12 UD Pelletron tandem accelerator located from downstairs 4th floor to 7th floor was strongly shaken by the shock of the earthquake. All high voltage accelerating columns fell down in the accelerator tank. The situation of damage and a post-quake reconstruction project of the Tandem Accelerator Facility at the University of Tsukuba will be reported.

PO17

Simulation of Electron and Ion Dynamics in an EBIS

electron, simulation, background, space-charge

97

L. Zhao, E.G. Evstati, J.S. Kim
Far-Tech, Inc., San Diego, California, USA
E.N. Beebe, A.I. Pikin
BNL, Upton, Long Island, New York, USA

Funding: Grant supported by DOE office of Nuclear Physics
To model the dynamics of the ions in an Electron Beam Ion Source (EBIS), a time-dependent, self-consist particle-in-cell Monte Carlo code (EBIS-PIC) has been developed by FAR-TECH, Inc. The energetic background electron beam is modeled by PBGUNS (http://www.far-tech.com/pbguns/index.html) by dividing the long beam path into several segments to resolve the big length-to-radius spatial scaling problem. The injected primary ions and ionized neutral gas ions are tracked using Monte Carlo method which includes the ionization, charge-exchange and Coulomb collisions with the electron beam and the neutral gas in the potential well, which is calculated by solving the Poisson equation each time step. EBIS-PIC has been able to predict the spatial and velocity space distributions and the evolution of the charge state distribution (CSD) of trapped ions in EBIS devices operating in fast or slow trapping mode. The physical model of EBIS-PIC code and the simulations of the trapping and charge-breeding of injected Cs+1 ions on the Test EBIS* at BNL will be presented. The simulation results have shown good consistency with the experiments.
* S. Kondrashev, J.G. Alessi, E.N.Beebe, C. Dickerson, P.N.Ostroumov, A. Pikin, G. Savard, NIMPR. A, 642 (2011), 18-24.

PO18

Tandem EBIS

electron, injection, solenoid, extraction

101

A.I. Pikin, J.G. Alessi, E.N. Beebe, M. Okamura, D. Raparia, J. Ritter, L. Snydstrup
BNL, Upton, Long Island, New York, USA

Funding: Work supported under the auspices of the US Department of Energy and the National Aeronautics and Space Administration.
A method to increase the ion beam intensity of RHIC EBIS by extending its ion trap into magnetic field of an additional superconducting solenoid is described. The strong axial support of the cold masses in these solenoids is required to place them on a common axis close to each other. Such configuration of solenoids allows to produce a long EBIS with a single electron gun, electron collector and injection system. Preliminary calculations of magnetic forces, magnetic field and potential distributions are presented along with proposed structure of the ion traps.

TUA01

Heavy Ion Accelerator Development at IUAC Delhi

heavy-ion, linac, ion-source, niobium

105

D. Kanjilal
IUAC, New Delhi, India

Inter University Accelerator Centre has been involved in the development of heavy ion accelerators, ion sources, beam lines and experimental facilities for providing various heavy ion beams in a wide energy range varying from a few tens of keV to hundreds of MeV for experiments by more than four hundred research groups from all over India and abroad. A large vertical Pelletron electrostatic tandem accelerator capable of achieving terminal voltage up to 16MV has been in operational for more than a couple of decades. Superconducting niobium linac booster accelerating modules having eight niobium quarter wave resonators each have been developed and used. A high temperature superconducting electron cyclotron resonance ion source (HTS-ECRIS) was designed, fabricated and installed. It is in regular operation for production of highly charged ion beams for alternate high current injector (HCI) system consisting of radio frequency quadrupole and drift tube Linacs. Details of developments of various heavy ion beam facilities and experimental systems at IUAC will be presented.

Slides TUA01 [5.689 MB]

TUA02

A Cost-Effective Energy Upgrade of the ALPI Linac at INFN-Legnaro

linac, simulation, cavity, ion-source

106

G. Bisoffi, M. Comunian, A. Facco, A. Galatà, P. Modanese, R. Pengo, A. Pisent, A.M. Porcellato, S. Stark
INFN/LNL, Legnaro (PD), Italy
B.B. Chalykh
ITEP, Moscow, Russia

The ALPI SC linac at INFN-LNL is being constantly upgraded in terms of maximum beam energy (Ef) and current, made available for experiments. Presently, a liquid-N cooling scheme is being applied to the RF power couplers of the 16 full Nb resonators, to keep them locked at 5 MV/m, vs. present 3 MV/m. A further upgrade of the 44 “medium beta section” cavities, changing the cavity Cu substrates, was prototyped and is reported at this conference: however it is not fully funded yet and is extremely time-consuming. A cost-effective Ef upgrade is proposed here: to move 2 SC buncher cryostats, which house a single working SC QWR but were designed for 4, at the end of ALPI, equipping them with 4 Nb/Cu QWRs each (new bunchers would either be NC QWRs or a single SC cavity cryostat). The contribution of these cryostats to Ef would be extremely effective: e.g. a Ef~10 MeV/A (Ibeam≥ 1 pnA) Pb beam, a very attractive tool for the Nuclear Physics community, is achievable. A being performed upgrade of ALPI cryoplant, expected to increase the refrigeration capability by ~25%, makes this change possible today. Details of this solutions, as well as its limits, will be presented and discussed

Slides TUA02 [3.722 MB]

TUB01

Development of NRA System for a 1.7MV Tandem Accelerator-Human Resource Development Program for Nuclear Engineering, The University of Tokyo

electron, resonance, target, proton

115

S. Ito, H. Matsuzaki, A. Morita
The University of Tokyo, Tokyo, Japan

The 1.7MV tandem accelerator (RAPID) at the University of Tokyo has been used for various research projects and educational studies since its installation in 1994. Recently RAPID has contributed to educational program for study by utilizing high sensitive ion beam analysis methods of the accelerator. In the fall of 2011, we newly developed a NRA (Nuclear Reaction Analysis) system with BGO scintillator. Detecting the resonant reaction 19F (p, αγ) 16O, a special student experimental class was successfully performed as a “Human resource development program for nuclear engineering”. The feature of this experiment is very few in advanced case study, which has performed with combine multiple ion beam correspond to a purpose for experiment. In this program students make their own samples for NRA analysis by ion implantation. Later in the year, RAPID will be relocated to the University of Tokyo (HIT facility) in Ibaraki prefecture to replace the 1MV tandem accelerator which was damaged by the Great East Japan Earthquake on March of 2011.

Slides TUB01 [1.426 MB]

TUB02

New Developments at the Tandem Accelerators Laboratory at IFIN-HH

ion-source, tandem-accelerator, controls, vacuum

118

D.G. Ghita, I.C. Calinescu, S. Dobrescu, N.M. Marginean, I.O. Mitu, T.B. Sava, B. Savu
IFIN, Magurele- Bucuresti, Romania
Gh. Cata-Danil, M.S. Dogaru, M. Enachescu, M.M. Gugiu, P. Ionescu, D.V. Mosu, A. Pantelica, D. Pantelica, A. Petre, I. Popescu, C.A. Simion, C. Stan-Sion, M. Statescu, N.V. Zamfir
Horia Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania

The upgrade of the 9 MV Tandem accelerator at IFIN-HH started in 2007. Remarkable improvements were done in the last 5 years that can be seen in the improved performance and reliability of the machine. Using original preparation techniques, some new beam species were tested for the first time in our laboratory. This opened the door to new experiments. A major improvement for the laboratory is the installation of 1 MV Tandetron accelerator dedicated to ultra-sensitive AMS measurements of C-14, Be-10, Al-26 and I-129, and 3 MV Tandetron accelerator dedicated to ion beam analysis. The main directions of the research activity in the laboratory will be shortly presented.

Slides TUB02 [3.686 MB]

TUB03

Terminal Voltage Stabilization of Pelletron Tandem Accelerator

controls, feedback, acceleration, electron

124

N.R. Lobanov, M.C. Blacksell, P. Linardakis, D. Tsifakis
Research School of Physics and Engineering, Australian National University, Canberra, Australia

Funding: Heavy Ion Accelerators Education Investment Fund (EIF)
A conventional corona control terminal voltage stabiliser has been investigated on the ANU 14UD tandem accelerator. The fluctuations in the charge transport of electrostatic pelletron generator and their correlation with mechanical oscillations of the chains and terminal voltage ripple have been analysed. Emphasis is placed on the performance of the two-loop feedback system and on the tuning of this system to production of high energy-resolution beams. The transfer function for the corona regulation loop has been determined and examined. The system produces the beam position at the image slit of the 90 energy-analysing magnet with long-term stability equivalent to a few hundred volts rms fluctuation of the terminal voltage. The concept of novel fast control loop utilizing the high-frequency component from the image slits to control the voltage of the last gap of high-energy acceleration tube is discussed.

Slides TUB03 [4.693 MB]

TUC01

Physical Design of the SPES Facility

rfq, target, plasma, linac

136

M. Comunian
INFN/LNL, Legnaro (PD), Italy

SPES (Selective Production of Exotic Species) is the Italian project for a radioactive ion beam (RIB) facility based on a cyclotron as primary accelerator and on the existing superconducting linac ALPI as post accelerator. The cyclotron, energy up to 70 MeV and total current of 0.75 mA, shared on two exits, is in construction in the industry. The production of neutron-rich radioactive nuclei, with ISOL technique, employs the proton induced fission on a direct target of UCx; the fission rate expected with a proton beam of 40 MeV and 0.2 mA, is 10¹3 fissions/s. The main goal of physical design of the SPES facility is to provide an accelerator system to perform forefront research in nuclear physics by studying nuclei far from stability, in particular neutron-rich radioactive nuclei with masses in the range of 80–160. The final RIB energy on the experimental target will be up to 11 MeV/A for A = 130, with an intensity in the range of 10⁷–10⁹ pps.

Slides TUC01 [5.313 MB]

TUC02

KEK Digital Accelerator and Recent Beam Commissioning Result

injection, acceleration, induction, kicker

143

K. Takayama, T. Adachi, T. Arai, D.A. Arakara, E. Kadokura, T. Kawakubo, T. Kubo, H. Nakanishi, K. Okamura, H. Someya, A. Takagi, M. Wake
KEK, Ibaraki, Japan
H. Asao, Y. Okada
NETS, Fuchu-shi, Japan
Y. Barata, S. Harada
Tokyo City University, Tokyo, Japan
T. Iwashita, K. Okazaki
Nippon Advanced Technology Co. Ltd., Ibaraki-prefecture, Japan
K.W. Leo
Sokendai, Ibaraki, Japan
X. Liu, T. Yoshimoto
TIT, Yokohama, Japan

The digital accelerator (DA), which is a small-scale induction synchrotron "*" requiring no high-energy injector and capable of providing various ions, was constructed at KEK"**". Beam commissioning has been carried out. The KEK-DA consists of a 200 kV high voltage terminal, in which a permanent mag. x-band ECRIS is embedded, 15 m long LEBT, ES injection kicker, and a 10 Hz rapid cycle synchrotron equipped with the induction acceleration system. An ion pulse chopped in 5 micro-sec by the newly developed Marx generator driven Einzel lens chopper"***" was guided through the LEBT and injected by the kicker in one turn. 3 micro-sec ion pulse was successfully captured with a pair of barrier voltage-pulses of 2 kV and accelerated up to 12 MeV with another flat induction-acceleration voltage-pulse through an acceleration period of 50 msec. Beam commissioning started with a He¹⁺ ion beam of 100 microA. Details of fully digital-controlled barrier bucket trapping and induction acceleration are described, although the acceleration/extraction is still at a preliminary stage. Some of unique applications, such as laboratory space science using virtual cosmic rays, will be introduced.
* K.Takayama and R.J.Briggs (Eds), “Induction Accelerators”, (Springer, 2010).
** T. Iwashita et al., Phys. Rev. ST-AB 14, 071301 (2011).
*** T.Adachi et al., Rev. Inst. Meth. 82, 083305 (2011).

Slides TUC02 [2.126 MB]

TUC03

Laser Ablation of Solids into an Electron Cyclotron Resonance Ion Sources for Accelerator Mass Spectroscopy

laser, ECR, target, plasma

149

T. Palchan, F.G. Kondev, S.A. Kondrashev, C. Nair, R.C. Pardo, R.H. Scott, R.C. Vondrasek
ANL, Argonne, USA
W. Bauder, P. Collon
University of Notre Dame, Indiana, USA
J.F. Berg, T. Maddock, G. Palmotti, G. Youinou
INL, Idaho Falls, Idaho, USA
G. Imel
ISU, Pocatello, Idaho, USA
M. Paul
The Hebrew University of Jerusalem, The Racah Institute of Physics, Jerusalem, Israel
M. Salvatores
CEA Cadarache, Saint Paul Lez Durance, France

Funding: This work is supported by the U.S. Department of Energy, Office of Nuclear Physics, under contract No. DE-AC02-06CH11357.
A project using accelerator mass spectrometry (AMS) is underway at the ATLAS facility to measure the atom densities of transmutation products present in samples irradiated in the Advanced Test Reactor at INL. These atom densities will be used to infer effective actinide neutron capture cross-sections ranging from Thorium to Califorium isotopes in different neutron spectra relevant to advanced fuel cycles. This project will require the measurement of many samples with high precision and accuracy. The AMS technique at ATLAS is based on production of highly-charged positive ions in an ECRIS followed by injection into a linear accelerator. We use a picosecond laser to ablate the actinide material into the ion source. We expect that the laser ablation technique will have higher efficiency and lower chamber contamination than sputtering or oven evaporation thus reducing ‘cross talk’ between samples. In addition a multi-sample holder/changer is part of the project to allow for a quick change between multiple samples. The results of off-line ablation tests and first results of a beam generated by the laser coupled to the ECR will be discussed as well as the overall project schedule.

Slides TUC03 [1.610 MB]

TUC04

Experiences and Lessons Learned at CARIBU with an Open 252Cf Source

controls, monitoring, neutron

155

S.I. Baker, J.P. Greene, A. Levand, R.C. Pardo, G. Savard, R.C. Vondrasek, L.W. Weber
ANL, Argonne, USA

Funding: This work is supported by the U.S. Department of Energy, Office of Nuclear Physics, under contract No. DE-AC02-06CH11357.
The CARIBU (the CAlifornium Rare Ion Breeder Upgrade) project at ATLAS is based on the creation of beams of neutron-rich nuclei produced as fission fragments from the 3% fission branch that occurs naturally in the decay of Cf-252. These fission fragments are thermalized in ultrapure helium gas and turned into a charged beam for use by the ATLAS accelerator or ‘stopped’ beam experiments. This requires a very thin source, electroplated on a stainless steel or platinum backing so that the fission fragments escape into the helium gas and are efficiently thermalized and collected into an ion beam. The information learned from the successive use of two sources with strengths of 2 mCi and 100 mCi has now prepared us for the installation in mid-summer of a 500 mCi source recently produced by Oak Ridge National Laboratory. This paper will describe the radiological monitoring system and our experience with the two weak “open” sources which have exercised and tested our radiological controls, emissions monitors, and procedures for the CARIBU facility and the source transfer area.

Slides TUC04 [1.605 MB]

WEA01

Advanced Accelerator Technology Aspects for Hadron Therapy

proton, synchrotron, cyclotron, extraction

156

L. Falbo
CNAO Foundation, Milan, Italy

Nowadays cancer can be considered as one of the wide spread diseases all around the world. Radiotherapy is the clinical technique used in 40% of cancer treatments: nowadays about 40% of the 18000 particle accelerators running in the world are devoted to radiotherapy. Classical radiotherapy employs photons and electrons that damage not only the diseased cells but also the healthy ones. Hadrontherapy is a high-precision radiotherapy exploiting the depth-dose deposition characteristics of the hadron particles. The realization of machines for hadrontherapy is more challenging than for standard radiotherapy: while most of hospitals have a device for classical radiotherapy, the hadrontherapy needs a dedicated building with the needed technology for the hadron acceleration. The first hadrontherapy treatments have been performed in particle physics research centers clinically adapted; nowadays there are dedicated facilities designed and built as hadrontherapy centers. This paper will give an overview on the existing hadrontherapy centers presenting the technologic background that is at the basis of the hadrontherapy world.

Slides WEA01 [4.493 MB]

WEA02

Focusing of Intense Heavy Ion Beams with Plasma Lenses

electron, focusing, plasma, heavy-ion

163

O. Meusel, M. Droba, U. Ratzinger, K. Schulte
IAP, Frankfurt am Main, Germany

Gabor lenses are a special type of plasma lens using a stable confined electron cloud for beam focusing. The electrons provide space charge neutralization of the beam traveling through the lens volume. At the same time a radial symmetric electrostatic self field focuses the beam mass independently. It is possible to control the density and distribution of the confined electrons providing variable focusing strength and moderate emittance growth of the beam. The knowledge of the behavior of the electron column inside this lens type is essential to understand the impact on beam transport. Therefore several diagnostic tools were developed to measure the electron cloud properties with and without ion beam propagation through Gabor lenses. Based on experimental results a new Gabor plasma lens has been designed for focusing heavy ion beams. A comparison of this lens type and a superconducting solenoid is planned at the low energy transport section of the GSI - High Current Test Injector (HOSTI).

Slides WEA02 [1.572 MB]

WEB01

Electron Beam Ion Sources, Traps, and Strings: Versatile Devices to Meet the High Charge State Ion Needs of Modern Facilities

electron, ion-source, heavy-ion, collider

164

E.N. Beebe, J.G. Alessi, A.I. Pikin
BNL, Upton, Long Island, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy, and by the National Aeronautics and Space Administration
Electron beam ion sources (EBIS) and its variants such as the electron beam ion trap (EBIT) and electron string ion source (ESIS) have been selected to provide highly charged ions for several atomic and nuclear physics facilities. Since the capture and breeding can be short and highly efficient, EBIST devices are increasingly being chosen for trapping and/or reacceleration of radioactive beams. The sources can range from petite to grand, using electron beams from ~1mA to 10A or more. They often serve accelerators and beam lines in large laboratories but they can be self contained laboratories where experiments are made in situ. We will discuss the basic principles as well as applications of these sources at various facilities around the world. Some emphasis will be placed on the recently commissioned RHIC EBIS source which is now providing beams for both high energy physics at the relativistic heavy ion collider as well as the NASA space radiation laboratory at BNL.

Slides WEB01 [2.850 MB]

WEB02

Commissioning of CARIBU EBIS Charge Breeder Sub-systems

gun, electron, cathode, solenoid

165

S.A. Kondrashev, C. Dickerson, A. Levand, P.N. Ostroumov, R.C. Vondrasek
ANL, Argonne, USA
M.A. Batazova, G.I. Kuznetsov
BINP SB RAS, Novosibirsk, Russia
A.I. Pikin
BNL, Upton, Long Island, New York, USA

Funding: This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under contract number DE-AC02-06CH11357.
A high-efficiency charge breeder based on an Electron Beam Ion Source (EBIS) to increase the intensity and improve the purity of accelerated neutron-rich radioactive ion beams is being developed by the ANL Physics Division. The design of the EBIS charge breeder is complete and manufacturing of the components and sub-systems is in progress. A 6-Tesla superconducting solenoid and a high-perveance electron gun were recently delivered and successfully commissioned. The current status of the ANL EBIS development and commissioning results of different EBIS sub-systems will be presented.

Slides WEB02 [1.219 MB]

WEB03

DREEBIT EBIS/T for Applications in Accelerator Physics

ion-source, electron, target, injection

170

M. Schmidt, A. Thorn
DREEBIT GmbH, Dresden, Germany
G. Zschornack
Technische Universität Dresden, Institut für Angewandte Physik, Dresden, Germany

Funding: Supported by the European Regional Development Fund (ERDF) and the German Federal Ministry of Economics and Technology
Electron Beam Ion Sources and Traps provide light up to heavy ions of low up to high charge states for various applications in accelerator physics such as medical particle therapy and charge breeding. Beside the well-known but quiet costly superconducting EBIS/T type systems compact and permanent magnet-operated EBIS/T from the DREEBIT Company are available, favorable for low-budget projects. Moreover, the "flagship" of the DREEBIT ion source family, the superconducting EBIS-SC features operating parameters comparable to the complex and expensive systems in the EBIS/T community.

Slides WEB03 [3.655 MB]

Poster WEB03 [7.892 MB]

WEB04

Electron and Ion Beam Dynamics in the CARIBU EBIS Charge Breeder

electron, simulation, ion-source, acceleration

172

C. Dickerson, S.A. Kondrashev, B. Mustapha, P.N. Ostroumov
ANL, Argonne, USA
A.I. Pikin
BNL, Upton, Long Island, New York, USA

Funding: This work is supported by the U.S. Department of Energy, Office of Nuclear Physics, under contract number DE-AC02-06CH11357.
An Electron Beam Ion Source (EBIS) is being built to charge breed ion beams from the Californium Rare Isotope Breeder Upgrade (CARIBU) for acceleration in the Argonne Tandem Linear Accelerator System (ATLAS) at Argonne National Laboratory (ANL). The overall efficiency of the source and charge breeder system is important since CARIBU will produce many low intensity radioactive ion species. Simulations of the electron and ion beam dynamics have been used to determine the system’s expected performance. The details of these simulations and results will be presented.

Slides WEB04 [1.362 MB]

WEB05

ECRIS Latest Developments

electron, ECRIS, ion-source, plasma

173

L. Celona, G. Castro, S. Gammino, D. Mascali
INFN/LNS, Catania, Italy
G. Ciavola
CNAO Foundation, Milan, Italy

The production of intense beams of highly charged ions (HCI) is one of the most relevant challenge for the future accelerator facilities. Electron Cyclotron Resonance Ion Sources (ECRIS) are nowadays the most powerful devices able to feed accelerators with HCI in a reliable and efficient way. The reliability of frontier solutions for magnets and the increased costs for microwave generators make scaling to larger frequency not viable. Any further improvement of ECRIS output currents and average charge state requires a deep understanding of electron and ion dynamics in the plasma. In the past 20 years different teams have been working in the forefront of ion source developments with both experimental and theoretical activities, proposing different solutions to improve the production rate. The paper will discuss the most recent technological developments in the field, worldwide, together with the modeling issues of non-classical evidences like sensitivity of Electron Energy Distribution Function to the magnetic field detuning, influence of plasma turbulences on electron heating and ion confinement, coupling between electron and ion dynamics and relative impact on the formed ion beam.

WEC03

The SC CW LINAC Demonstrator – 1st Test of an SC CH-cavity with Heavy Ions

cavity, linac, solenoid, heavy-ion

182

S. Mickat, L.A. Dahl
GSI, Darmstadt, Germany
M. Amberg, K. Aulenbacher, W.A. Barth, V. Gettmann, S. Mickat
HIM, Mainz, Germany
D. Bänsch, F.D. Dziuba, D. Mäder, H. Podlech, U. Ratzinger, R. Tiede
IAP, Frankfurt am Main, Germany

The superconducting (sc) continuous wave (cw) LINAC Demonstrator is a collaboration project between GSI, the Helmholtz Institute Mainz (HIM), and the Institute for Applied Physics (IAP) at the Goethe University Frankfurt. The aim is a full performance test of a 217 MHz sc Crossbar H-mode (CH) cavity, which provides gradients of 5.1 MV/m at a total length of 0.69 m. In addition the Demonstrator comprises two 9.3 Tesla sc solenoids. The configuration of a CH-cavity embedded by two sc solenoids is taken from a conceptual layout of a new sc cw LINACwith nine CH-cavities and seven solenoids. Such an accelerator is highly desired by a broad community of users requesting heavy ion beam energies in the Coulomb barrier range. A successful test of such an sc multigap structure are an important milestone towards the proposed cw-LINAC.

Slides WEC03 [1.842 MB]

WEC05

Design Studies for a New Heavy Ion Injector Linac for FAIR

linac, heavy-ion, injection, acceleration

191

B. Schlitt, W.A. Barth, G. Clemente, W. Vinzenz
GSI, Darmstadt, Germany

As the GSI UNILAC started operation in 1975, it will be more than 40 years old when the commissioning of the future Facility for Antiproton and Ion Research (FAIR) at GSI will start. To assure reliable operation for FAIR and to provide beams for a variety of experiments, three separate linacs are proposed: 1.) A new superconducting cw heavy-ion linac behind the upgraded high charge state injector HLI shall provide ion beams with high duty cycle and adjustable energy in the MeV/u region for the super-heavy element program as well as for further UNILAC experiments. 2.) A dedicated 70 MeV proton linac will serve as injector for the FAIR pbar physics program. 3.) To deliver high-intensity heavy-ion beams for FAIR, the existing post-stripper linac should be replaced by a new high energy linac with short beam pulses, low pulse repetition rate, and fixed end energy. Conceptual design studies for the latter machine using 10⁸ MHz IH-type drift tube structures will be presented, including a proposal to increase the ion charge states for synchrotron injection as well as a linac beam energy upgrade using 325 MHz CH structures.

Slides WEC05 [6.013 MB]

THA01

Heavy Ion Superconducting Linacs: Status and Upgrade Projects

linac, heavy-ion, status

196

P.N. Ostroumov
ANL, Argonne, USA

Funding: This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under contract number DE-AC02-06CH11357.
We observe that there is an increase in the demand, by the scientific community, for accelerated CW ion beams which can be efficiently provided by SC ion linacs. This demand can be categorized into two areas: existing and new facilities. Existing facilities are being refurbished and upgraded for higher energies and beam intensities. Several new projects are under development or construction worldwide. Recently, development of new SC ion linacs has started in China, Korea and Spain. In this talk I will briefly review both the upgrade and new SC ion linac projects with a primary focus on the advances in heavy-ion linac technologies achieved at ANL in connection with the efficiency and intensity upgrade of ATLAS.

Slides THA01 [3.981 MB]

THA03

Status and Upgrade Project of HIRFL

heavy-ion, linac, DTL, rfq

198

G.Q. Xiao, Y. He, X. Ma, M.T. Song, J.W. Xia, H.S. Xu, J.C. Yang, Y.J. Yuan, H.W. Zhao, X. Zhou
IMP, Lanzhou, People's Republic of China

Heavy Ion Research Facility at Lanzhou is a heavy ion accelerator complex for nuclear, atomic, and biology application research activities. It is the biggest heavy ion accelerator facility in China, consisting two cyclotrons in series as injector and two cooling storage rings (CSRm and CSRe) as main synclotron and experimental spectrum separately. The species from P to U were accelerated in the machine, And the maximum energy is 1 GeV/u for C. The experimetal teminals are on meterial, biology, canser therapy, SHE, RIB, mass measurement, inner target, and so on. To improve beam intensity and available beam time, a linear injectors SSC-LINAC were proposed in 2009. It consists a 4-rod RFQ and 4 IH-DTL tanks. The RFQ, IH-DTL, and 60 kW solid state amplifier for SSC-LINAC are tested priliminaryly. The operation status and progress of upgrade projects of HIRFL are presented in the paper.

Slides THA03 [6.806 MB]

THB01

New Developments in Low-Z Gas Stripper Sstem at RIKEN Radioactive Isotope Beam Factory (RIBF)

electron, acceleration, target, cyclotron

199

H. Okuno, N. Fukunishi, H. Hasebe, H. Imao, O. Kamigaito, M. Kase, H. Kuboki
RIKEN Nishina Center, Wako, Japan

Electron stripping process from heavy ion in material is a useful tool in accelerator complex to give higher charge state of the ion, allowing its effective acceleration. This process is competed with electron capture process and reach to the equilibrium charge state. Carbon foils is convenient for charge stripper but have short lifetime due to thermal stress and sputtering in the case of high power beam of heavy ion such as uranium. Gas is basically free from lifetime but gives lower charge state due to absent of density effect. Therefore, charge stripper especially for uranium beams at 10^-20 MeV/u could be a bottle-neck problem in high power heavy ion facility such as RIBF, FRIB and FAIR. A charge stripper using low-Z gas (He or H2) is an important candidate to solve the problem because the high equilibrium mean charge states for the low-Z gas stripper are expected due to the suppression of the electron capture process. This presenation will describe the results for the develeopments and tests of He gas stripper for uranium beams at 11 MeV/u.

Slides THB01 [7.108 MB]

THB03

Design Sudy for Front-End System at Rare Isotope Science Project (RISP)

rfq, ECR, emittance, simulation

207

E.-S. Kim
KNU, Deagu, Republic of Korea
J. Bahng, J.G. Hwang, S.W. Jang
Kyungpook National University, Daegu, Republic of Korea
B. Choi, D. Jeon, B. Kim, H. Kim, S.K. Kim
IBS, Daejeon, Republic of Korea

Heavy ion beams of 400 kW and 70 kW are generated at the RISP by in-flight and ISOL methods, respectively. Front-End system in the RISP consists of 28 GHz superconducting ECR-IS with 10 keV/u, LEBT with two-bends and a multi-harmonic buncher, a RFQ with 81.25 MHz and 300 keV/u, and MEBT with two re-bunchers. The design studies have been performed to optimize the beam and accelerator parameters to meet the required design goals. It is shown that the front-end simulations results can provide the two-charge state beams up to uranium to upstream linac with the required beam emittances. In this paper, we present the design results for the front-end system and on the beam dynamics.

Slides THB03 [1.942 MB]

THB04

Development of the Intensity and Quality of the Heavy Ion Beams at GSI

rfq, emittance, vacuum, injection

211

L.A. Dahl, W.A. Barth, M.C. Bellachioma, L. Groening, O.K. Kester, M.M. Kirk, D. Ondreka, N. Pyka, P.J. Spiller, J. Stadlmann, H. Vormann, S.G. Yaramyshev
GSI, Darmstadt, Germany
L.H.J. Bozyk, Y. El-Hayek
FIAS, Frankfurt am Main, Germany
C. Xiao
IAP, Frankfurt am Main, Germany

For injection into the future FAIR SIS100 synchrotron the GSI linear accelerator UNILAC and synchrotron SIS18 have to provide 1.5·1011 p/spill for the reference U²⁸⁺ beam. The MeVVa ion source extracts 37 emA of U⁴⁺ beam. For improved transmission the RFQ vanes were revised and exchanged. A new ion source terminal with straightforward beam injection into the RFQ is calculated and partly realized for loss free beam transport to the RFQ. To improve the quality of the space charge dominated beam in the DFFD periodic focussing Alvarez section a transverse 4th order resonance was investigated by simulations and experimentally. The multi turn beam injection into the SIS18 requires emittances below βγεx/βγεy=0.8/2.5 [μm]. This suggests introducing a new concept for emittance transfer by solenoidal stripping. A set-up for experimental proof of principle will be installed at the foil stripper. The SIS18 has been equipped with NEG-coated chambers for all magnets and the injection septum. Newly installed ion catchers improve especially the dynamic vacuum pressure. The effect on progress in beam quality development and intensity will be reported.

Slides THB04 [9.809 MB]

THB05

The HITRAP Decelerator and Beam Instrumentation

rfq, electron, diagnostics, instrumentation

217

F. Herfurth, Z. Andjelkovic, W.A. Barth, K. Brantjes, G. Clemente, L.A. Dahl, S. Fedotova, P. Gerhard, M. Kaiser, O.K. Kester, H.J. Kluge, C. Kozhuharov, M.T. Maier, D. Neidherr, W. Quint, A. Reiter, T. Stöhlker, G. Vorobjev, S.G. Yaramyshev
GSI, Darmstadt, Germany
U. Ratzinger, A. Schempp
IAP, Frankfurt am Main, Germany

A linear decelerator is being commissioned for heavy, highly-charged ions (HCI) at GSI in Darmstadt/Germany. HCI with only one or few electrons are interesting systems for many different experiments as for instance precision tests of the theory of quantum electrodynamics (QED). In order to transform heavy HCI produced at 400 MeV/u to stored and cooled HCI at low energy the linear decelerator facility HITRAP has been setup behind the experimental storage ring (ESR). The ions are decelerated in the ESR from 400 to 4 MeV/u, cooled and extracted. The ions are then matched to an IH-structure using a double drift buncher, decelerated from 4 to 0.5 MeV/u in the IH, and then down to 6 keV/u in a 4-rod RFQ. To detect and analyze the weak and sparse ion bunches a new type of energy analyzing detector has been developed along with improvements to other “standard” beam instrumentation. One million highly charged ions have been decelerated with the IH from 400 MeV/u to about 0.5 MeV/u per cycle. The RFQ has shown in off-line tests to decelerate ions, however, the measured acceptance does not fit the ion beam from the IH. This requires a refined design, which is underway.

Slides THB05 [2.925 MB]