Author: Zhao, Q.
Paper Title Page
WEP226 Commissioning Results of the ReA RFQ at MSU* 1912
 
  • D. Leitner, C. Benatti, S.W. Krause, D. Morris, S. Nash, J. Ottarson, G. Perdikakis, M. Portillo, R. Rencsok, T. Ropponen, L. Tobos, N.R. Usher, D. Wang
    NSCL, East Lansing, Michigan, USA
  • J. Haeuser
    Kress GmbH, Biebergemuend, Germany
  • O.K. Kester
    GSI, Darmstadt, Germany
  • F. Marti, E. Tanke, X. Wu, Q. Zhao
    FRIB, East Lansing, Michigan, USA
  • A. Schempp, J.S. Schmidt, H. Zimmermann
    IAP, Frankfurt am Main, Germany
 
  Funding: Project funded by Michigan State University
The Facility for Rare Isotope Beams (FRIB) is currently in the preliminary design phase at Michigan State University (MSU). FRIB consists of a driver LINAC for the acceleration of heavy ion beams, followed by a fragmentation target station and a ReAccelerator facility (ReA3). ReA3 comprises gas stopper systems, an Electron Beam Ion Trap (EBIT) charge state booster, a room temperature radio frequency quadrupole (RFQ), a LINAC using superconducting quarter wave resonators and an achromatic beam transport and distribution line to the new experimental area. Beams from ReA3 will range from 3 MeV/u for heavy ions to about 6 MeV/u for light ions. The ReA3 RFQ, which is of the 4 rod type, is designed to accelerate ions with an Q/A of 0.2 to 0.5 from 12 keV/u to 600 keV/u. The RFQ operates at a frequency of 80.5 MHz and power levels up to 120 kW at 10% duty factor. In this paper we will report on commissioning results from the ReA3 RFQ using a H2+ and He+ beam from an auxiliary ion source.
 
 
FROBN2 Technical Challenges in Design and Construction of FRIB 2561
 
  • R.C. York, G. Machicoane
    NSCL, East Lansing, Michigan, USA
  • S. Assadi, G. Bollen, T . Glasmacher, W. Hartung, M.J. Johnson, F. Marti, E. Pozdeyev, M.J. Syphers, E. Tanke, J. Wei, X. Wu, Q. Zhao
    FRIB, East Lansing, Michigan, USA
 
  Funding: Work supported by DOE CA DE-SC0000661 and Michigan State University.
The Facility for Rare Isotope Beams (FRIB) will be a world-leading, DOE national users facility for the study of nuclear structure, reactions and astrophysics on the campus of Michigan State University. A superconducting, heavy-ion, driver linac will be used to provide stable beams of >200 MeV/u at beam powers up to 400 kW (~650 electrical micro-amps for uranium) that will be used to produce rare isotopes by in flight fragment separation. The selected rare isotopes will be used at velocity (~0.5 c), stopped, or reaccelerated. FRIB is a challenging technical project. An overview of the project, project challenges, and mitigating strategies will be presented.
 
slides icon Slides FROBN2 [14.690 MB]  
 
TUP091 Electromagnetic Design of a Multi-harmonic Buncher for the FRIB Driver Linac 1000
 
  • J.P. Holzbauer, W. Hartung, F. Marti, Q. Zhao
    NSCL, East Lansing, Michigan, USA
  • E. Pozdeyev
    FRIB, East Lansing, Michigan, USA
 
  Funding: Work supported by the U.S. Department of Energy under Grant Number DE-FGO2-08ER41553.
The driver linac for the Facility for Rare Isotope Beams (FRIB) at MSU will produce primary beams of ions at ≥200 MeV/u for nuclear physics research. A dc ion beam from an ECR ion source will be pre-bunched upstream of the radio frequency quadrupole linac. A multi-harmonic buncher (MHB) was designed for this purpose, using experience gained with a similar buncher for the ReA3 re-accelerator linac, which is presently being commissioned at MSU. The FRIB MHB resonator operates with three frequencies (40.25 MHz, 80.5 MHz, and 120.75 MHz) to produce an approximately linear sawtooth in the voltage as a function of time. The three resonant frequencies are produced via two quarter-wave resonators with a common gridless gap: one resonator is driven at its fundamental mode at 40.25 MHz and its first higher-order mode (120.75 MHz), while the other is driven only at its fundamental mode of 80.5 MHz. The electromagnetic design of the MHB resonator will be presented, including the electrode design and tuning mechanisms.