Keyword: heavy-ion
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MOB03 Design and Status of the Super Separator Spectrometer for the GANIL SPIRAL2 Project multipole, status, dipole, simulation 23
  • J.A. Nolen, S.L. Manikonda
    ANL, Argonne, USA
  • M. Authier, A. Drouart, J. Payet
    CEA/DSM/IRFU, France
  • O. Delferrière
    CEA/IRFU, Gif-sur-Yvette, France
  • J. Laune
    IPN, Orsay, France
  • F. Lutton, H. Savajols, M. Souli, M.-H. Stodel
    GANIL, Caen, France
  Funding: This work is partially supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357.
The Super Separator Spectrometer (S3) is a device designed for experiments with the very high intensity stable heavy ion beams of the superconducting linear accelerator of the SPIRAL2 Project at GANIL. S3 is designed to combine high acceptance, a high degree of primary beam rejection, and high mass resolving power to enable new opportunities in several physics domains, e.g. super-heavy and very-heavy nuclei, spectroscopy at and beyond the drip-line, isomers and ground state properties, multi-nucleon transfer and deep-inelastic reactions. The spectrometer comprises 8 large aperture multipole triplets (7 superconducting and 1 open-sided room temperature), 3 magnetic dipoles, and 1 electrostatic dipole arranged as a momentum achromat followed by a mass separator. A summary of the beam-optical simulations and the status of the main spectrometer components will be presented with special emphasis on the design of the superconducting multipole triplets.
slides icon Slides MOB03 [2.745 MB]  
MOB05 Rare-Isotope Beam Facilities in Asia ion, linac, cyclotron, 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]  
MOC02 Progress of the SPIRAL2 Project cyclotron, ISOL, neutron, proton 40
  • E. Petit
    GANIL, Caen, France
  The SPIRAL2 facility will extend the possibilities offered at GANIL to heavier radioactive beams, with much higher intensities : it will provide intense beams of neutron-rich exotic nuclei created by the ISOL production method. The extracted exotic beam will be used either in a new low energy experimental area called DESIR, or accelerated by the existing SPIRAL 1 cyclotron (CIME. The intense primary stable beams (deuterons, protons, light and heavy ions) will also be used at various energies for nuclear physics, as well as for neutron-based research and multi-disciplinary research, in dedicated caves called S3 and NFS. During year 2008, the decision has been taken to build the SPIRAL2 machine in two phases: - first phase including the driver accelerator and its associated new experimental areas (S3 and NFS caves), - second phase including the RIB production part, with the low energy RIB experimental hall called DESIR, and the connection to the GANIL existing facility for post-acceleration by the existing CIME cyclotron. The SPIRAL2 facility is now in its construction phase, with the objective of obtaining the first beams for physics during year 2014 with the first phase.  
slides icon Slides MOC02 [5.173 MB]  
TUA01 Heavy Ion Accelerator Development at IUAC Delhi 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 icon Slides TUA01 [5.689 MB]  
WEA02 Focusing of Intense Heavy Ion Beams with Plasma Lenses electron, focusing, plasma, 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 icon 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 ion, electron, ion-source, 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 icon Slides WEB01 [2.850 MB]  
WEC01 Production 72 MHz β=0.077 Superconducting Quarter-wave Cavities for ATLAS cavity, niobium, linac, 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]  
WEC03 The SC CW LINAC Demonstrator – 1st Test of an SC CH-cavity with Heavy Ions cavity, linac, solenoid, 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]  
WEC05 Design Studies for a New Heavy Ion Injector Linac for FAIR linac, 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, linac, 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]  
THA03 Status and Upgrade Project of HIRFL 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 icon Slides THA03 [6.806 MB]