Keyword: linac
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MOB01 The FRIB Project – Accelerator Challenges and Progress cryomodule, ion, 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 icon Slides MOB01 [4.891 MB]  
MOB05 Rare-Isotope Beam Facilities in Asia ion, 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 icon Slides MOB05 [8.967 MB]  
MOC01 Progress and Plans for High Mass Beam Delivery at TRIUMF rfq, ISAC, target, ion 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 icon Slides MOC01 [3.144 MB]  
MOC03 Operational Considerations for Future Multi-user RIB Facilities ISAC, TRIUMF, controls, cyclotron 41
  • A.C. Morton
    TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
  TRIUMF's ISAC is an ISOL-type RIB facility. RIB are produced in direct reactions of 480–500 MeV protons from TRIUMF's main cyclotron on thick targets in one of two production target stations. Like other such facilities, ISAC is only capable of serving a single RIB user at any given time, though simultaneous delivery of stable and radioactive beams to different experimental areas is possible. With the construction of ARIEL, the Advanced Rare-IsotopE Laboratory, ISAC will gain a second production front end. RIB will be produced by photofission on actinide targets using electrons from a new superconducting electron linac. This will give ISAC the ability to serve two RIB experiments concurrently with beams produced by different reaction mechanisms in separate target areas (with delivery of a third, stable, beam still possible). The shift from single-user to multi-user RIB operation will introduce significant new complexity to beam delivery, requiring new tools and techniques for beam time to be used efficiently. A first look at the potential operational requirements of a multi-user RIB facility will be discussed.  
slides icon Slides MOC03 [4.945 MB]  
PO04 The Darmstadt Multi-Frequency Digital Low Level RF System in Pulsed Application controls, cavity, low-level-rf, electron 58
  • R. Eichhorn, U. Bonnes, C. Burandt, M. Konrad, P.N. Nonn
    TU Darmstadt, Darmstadt, Germany
  • G. Schreiber, W. Vinzenz
    GSI, Darmstadt, Germany
  Funding: Work supported by DFG through CRC 634 and by the BMBF under 06 DA 9024 I
Triggered by the need to control the superconducting cavities of the S-DALINAC, the development of a digital low level RF control system was started several years ago. The chosen design proved to be very flexible since other frequencies than the original 3 GHz may be adapted easily: The system converts the RF signal coming from the cavity (e. g. 3 GHz) down to the base band using a hardware I/Q demodulator. The base band signals are digitized by ADCs and fed into a FPGA where the control algorithm is implemented. The resulting signals are I/Q modulated before they are sent back to the cavity. Meanwhile, this system has been successfully operated on 3 GHz, 6 GHz and 325 MHz cavities, on normal and superconducting cavities as well as in cw or pulsed mode. This contribution will focus on the 325 MHz version built to control a pulsed prototype test stand for the p-LINAC at FAIR and possible extensions to even lower frequencies. We will present the architecture of the RF control system as well as results obtained during operation.
PO05 Control and Information System for BARC – TIFR Superconducting LINAC Booster controls, booster, cryogenics, cryomodule 62
  • S. Singh
    BARC, Mumbai, India
  • J.N. Karande, V. Nanal, R.G. Pillay
    TIFR, Mumbai, India
  • P. Singh
    LEHIPA Project, Physics Group, Mumbai, India
  Superconducting LINAC booster is modular machine which consists of 7 cryomodules each consisting four quarter wave resonators and one superbuncher module. The control system is a mixed distributed control system. Geometrical distributed system architecture has been followed for RF control. RF control has four local nodes( RF LCS) each nodes catering to two cryostat. Two additional nodes are made for beam line system and cryogenics distribution system, making it a systematic distribution system. The system is developed on Linux operating system but the software is portable on Linux and Microsoft windows. The software is developed in two layers namely scanner and operator interface. Scanners interacts with the interface hardware. All scanners are developed in JAVA , which is very challenging job looking towards the feature of JAVA. Various issues regarding this were closely investigated and solved to overcome the deficiency of JAVA .A micro-controller based board has been developed for cryogenics line distribution system. Different subsystems of the control system has been developed independently. A complete integration of the system will be completed before Dec 2012.  
PO06 Extension of Superconducting LINAC Operation to Lighter Beams controls, cryogenics, target, instrumentation 65
  • V. Nanal, R.D. Deshpande, P. Dhumal, J.N. Karande, R. Palit, R.G. Pillay, M.S. Pose, S.M. Powale, C. Rozario, S.K. Sarkar, M.E. Sawant, A.A. Shinde, S.R. Sinha, A.N. Takke
    TIFR, Mumbai, India
  • S. Singh
    LEHIPA Project, Physics Group, Mumbai, India
  The superconducting LINAC booster at Pelletron Linac Facility(Mumbai), has been fully operational since July 2007. The Liquid Helium Refrigeration plant for the LINAC has been upgraded to enhance the refrigeration capacity to ~450 Watts at 4.5K without LN2 pre-cool, from the earlier capacity of ~300 Watts. All beam lines in new user halls have been commissioned and new experimental setups have been added. Several experiments have been carried out using beams of 12C, 16O, 19F, 28Si, 31P. The QWR cavity is designed for β=0.1 and hence it is difficult to accelerate lighter beams. Due to growing interest in studying Li induced reactions on fissile targets at energies higher than 55 MeV, we have recently accelerated Li beam using four cryostat modules. Starting with 40 MeV Li beam from the pelletron, 56 MeV beam was successfully delivered at target station for a test experiment.  
TUA01 Heavy Ion Accelerator Development at IUAC Delhi ion, heavy-ion, 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 icon Slides TUA01 [5.689 MB]  
TUA02 A Cost-Effective Energy Upgrade of the ALPI Linac at INFN-Legnaro ion, 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 icon Slides TUA02 [3.722 MB]  
TUB04 LINAC Experience In The First Two Years of Operation @ CNAO (Centro Nazionale Adroterapia Oncologica) rfq, synchrotron, proton, injection 129
  • S. Vitulli, E. Vacchieri
    CNAO Foundation, Milan, Italy
  • A. Reiter, B. Schlitt
    GSI, Darmstadt, Germany
  CNAO is the first medical accelerator facility for deep hadrontherapy with C6+ and H3+ in Italy. The LINAC device at CNAO include a RFQ structure accelerating up to 400 keV/u and an IH structure works up to 7 MeV/u. Such LINAC works as injector in a 78 m circumference synchrotron where the beam reaches up to 400 MeV/u. The LINAC commissioning was performed during 2009 and from beginning of 2011, it entered into routine and continuous operation. First patient was treated in September 2011. The principal LINAC parameters are daily monitored, like output energy (by means of online not destructive ToF measurements), cavities voltage, cavities RF forward power, beam current transmission. No major faults were observed in the first two years of operation. LINAC beam is stable within an error of ±0.02 MeV/u. The relation between LINAC extraction and synchrotron injection is under investigation. This paper summarizes the monitoring issues (i.e. reproducibility of settings and beam parameters as well as long term stability measures) on the CNAO LINAC during daily patient treatments and outlines the measurements performed in the initial commissioning compared within actual status.  
TUC01 Physical Design of the SPES Facility rfq, target, ion, plasma 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 icon Slides TUC01 [5.313 MB]  
WEC01 Production 72 MHz β=0.077 Superconducting Quarter-wave Cavities for ATLAS cavity, niobium, heavy-ion, acceleration 174
  • M.P. Kelly, Z.A. Conway, S.M. Gerbick, M. Kedzie, R.C. Murphy, B. Mustapha, P.N. Ostroumov, T. Reid
    ANL, Argonne, USA
  A total of eight 72 MHz β=0.077 superconducting quarter-wave cavities have recently been completed at Argonne National Laboratory. Seven of these will installed into the ATLAS superconducting heavy-ion linac as part of a beam intensity upgrade, with one remaining for the purposes of continuing to push the performance limits in these structures. Cavities were fabricated using techniques adapted the worldwide effort push niobium cavities close to the material limits. Key developments include the use of electropolishing on the complete helium-jacketed cavity. Wire EDM has been used instead of traditional niobium machining in order to minimize performance limiting defects near the weld seams. Hydrogen degassing at 600C after electropolishing has also been performed. Initial test results show practical acceleration at 4 Kelvin with cavity voltages, Vacc>3 MV/cavity and at 2 Kelvin with Bpeak>120 mT and Vacc>5 MV/cavity.  
slides icon Slides WEC01 [2.843 MB]  
WEC02 Status of the HIE-ISOLDE Project at CERN cryomodule, emittance, vacuum, cryogenics 175
  • Y. Kadi, A.P. Bernardes, Y. Blumenfeld, E. Bravin, S. Calatroni, R. Catherall, M.A. Fraser, B. Goddard, D. Parchet, E. Siesling, G. Vandoni, W. Venturini Delsolaro, D. Voulot, L.R. Williams
    CERN, Geneva, Switzerland
  The HIE-ISOLDE project represents a major upgrade of the ISOLDE facility with a mandate to significantly improve the quality and increase the intensity and energy of radioactive nuclear beams produced at CERN. The project will expand the experimental nuclear physics programme at ISOLDE by focusing on an upgrade of the existing REX linac with a 40 MV superconducting linac comprising thirty-two niobium-on-copper sputter-coated quarter-wave resonators housed in six cryomodules. The new linac will raise the energy of post-accelerated beams from 3 MeV/u to over 10 MeV/u. The upgrade will be staged to first deliver beam energies of 5.5 MeV/u using two high-β cryomodules placed downstream of REX, before the energy variable section of the existing linac is replaced with two low-β cryomodules and two additional high-β cryomodules are installed to attain over 10 MeV/u with full energy variability from as low as 0.45 MeV/u. An overview of the project including a status summary of the different R&D activities and the schedule will be given here.  
slides icon Slides WEC02 [19.513 MB]  
WEC03 The SC CW LINAC Demonstrator – 1st Test of an SC CH-cavity with Heavy Ions cavity, solenoid, ion, 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 icon Slides WEC03 [1.842 MB]  
WEC04 Operation of Superconducting Linac and Commissioning of the Last Linac at IUAC Delhi acceleration, damping, niobium, bunching 185
  • S. Ghosh, R. Ahuja, J. Antony, S. Babu, J. Chacko, A. Choudhury, G.K. Chowdhury, T.S. Datta, R.N. Dutt, R. Joshi, D. Kanjilal, S. Kar, J. Karmakar, M. Kumar, R. Kumar, D.S. Mathuria, K.K. Mistri, A. Pandey, P. Patra, P.N. Prakash, A. Rai, A. Roy, J. Sacharias, B.K. Sahu, A. Sarkar, S.S. Sonti
    IUAC, New Delhi, India
  The major part of the superconducting linac at IUAC has been operational for the past few years and the last accelerating module is in the final stage of completion. The full linac system consists of five cryostats, housing a total of twenty seven niobium quarter wave resonators. At present, the Superbuncher, the first two linac accelerating modules and the Rebuncher are operational and ion beams in the mass range 12C to 107Ag from Pelletron accelerator have been further accelerated and delivered to conduct experiments. A method of random phase focusing to select the accelerating phase of the resonators between 70° and 110° has been successfully tried to reduce the final time width of the beam bunch. Presently, to improve the accelerating fields of the linac resonators in phase locked condition, efforts are dedicated towards improvement of the cooling efficiency of the drive coupler, enhancement of the microphonics damping efficiency with mixtures of SS-balls and testing of an alternate tuning mechanism based by Piezo Crystal. The beam acceleration through the complete linac is to be performed by end of the summer of 2012.  
slides icon Slides WEC04 [2.810 MB]  
WEC05 Design Studies for a New Heavy Ion Injector Linac for FAIR ion, 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 icon Slides WEC05 [6.013 MB]  
THA01 Heavy Ion Superconducting Linacs: Status and Upgrade Projects ion, 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 icon Slides THA01 [3.981 MB]  
THA02 Overview of the RISP Superconducting Linac ISOL, proton 197
  • D. Jeon, Y. Chung, H.J. Kim, S.K. Kim
    IBS, Daejeon, Republic of Korea
  • E.-S. Kim
    KNU, Deagu, Republic of Korea
  • J.-W. Kim
    NCC, Korea, Kyonggi, Republic of Korea
  • Y.Y. Lee
    BNL, Upton, Long Island, New York, USA
  The Rare Isotope Science Project (RISP) got launched December 2011 which consists of In-Flight Fragmentation Facility and ISOL facility, providing uniques research opportunities in broad range of sciences. The superonducting driver linac can accelerate up to 200 MeV/u for uranium beam and up to 600 MeV for proton beam. The ISOL post linac which is also a superconducting linac. Design parameters and choices are presented.  
slides icon Slides THA02 [3.085 MB]  
THA03 Status and Upgrade Project of HIRFL heavy-ion, ion, 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 icon Slides THA03 [6.806 MB]  
THB02 New Design for the SARAF Phase II Linac rfq, proton 206
  • B. Mustapha, Z.A. Conway, M.P. Kelly, A. Kolomiets, S.V. Kutsaev, P.N. Ostroumov
    ANL, Argonne, USA
  • J. Rodnizki
    Soreq NRC, Yavne, Israel
  Funding: This work was supported by the ANL WFO No. 85Y47.
We have developed a new design for the 40 MeV/u - 5 mA proton/deuteron SARAF Phase-II Linac. It includes a RFQ, room-temperature bunchers and two types of SC cavities. The new design is based on highly optimized ring-shaped HWR structures operating at 176 MHz, the same frequency as the current SARAF Phase-I linac. We will first present the optimized design of all the components from the RFQ to the SC cavities, then the proposed linac layout, and finally the results of end-to-end beam dynamics simulations including machine errors, realistic corrections and beam loss analysis.
slides icon Slides THB02 [2.634 MB]