Author: Tiefenback, M.G.
Paper Title Page
TUODN3 Beam Dynamics Studies of Parallel-Bar Deflecting Cavities 790
 
  • S. Ahmed, J.R. Delayen, A.S. Hofler, G.A. Krafft, M. Spata, M.G. Tiefenback
    JLAB, Newport News, Virginia, USA
  • K.B. Beard
    Muons, Inc, Batavia, USA
  • K.A. Deitrick
    RPI, Troy, New York, USA
  • S.D. Silva
    ODU, Norfolk, Virginia, USA
 
  Funding: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177.
We have performed three-dimensional simulations of beam dynamics for parallel-bar transverse electromagnetic mode (TEM) type RF separators: normal- and superconducting. The compact size of these cavities as compared to conventional TM110 type structures is more attractive particularly at low frequency. Highly concentrated electromagnetic fields between the parallel bars provide strong electrical stability to the beam for any mechanical disturbance. An array of eight 2-cell normal conducting cavities or a one- or two-cell superconducting structure are enough to produce the required vertical displacement at the Lambertson magnet. Both the normal and superconducting structures show very small emittance dilution due to the vertical kick of the beam.
 
slides icon Slides TUODN3 [1.558 MB]  
 
THP093 Design Status of MEIC at JLab 2306
 
  • Y. Zhang, S. Ahmed, S.A. Bogacz, P. Chevtsov, Y.S. Derbenev, A. Hutton, G.A. Krafft, R. Li, F. Marhauser, V.S. Morozov, F.C. Pilat, R.A. Rimmer, Y. Roblin, T. Satogata, M. Spata, B. Terzić, M.G. Tiefenback, H. Wang, B.C. Yunn
    JLAB, Newport News, Virginia, USA
  • S. Abeyratne, B. Erdelyi
    Northern Illinois University, DeKalb, Illinois, USA
  • D.P. Barber
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  • A.M. Kondratenko
    GOO Zaryad, Novosibirsk, Russia
  • S.L. Manikonda, P.N. Ostroumov
    ANL, Argonne, USA
  • H. K. Sayed
    ODU, Norfolk, Virginia, USA
  • M.K. Sullivan
    SLAC, Menlo Park, California, USA
 
  Funding: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177.
An electron-ion collider (MEIC) is envisioned as the primary future of the JLab nuclear science program beyond the 12 GeV upgraded CEBAF. The present MEIC design selects a ring-ring collider option and covers a CM energy range up to 51 GeV for both polarized light ions and un-polarized heavy ions, while higher CM energies could be reached by a future upgrade. The MEIC stored colliding ion beams, which will be generated, accumulated and accelerated in a green field ion complex, are designed to match the stored electron beam injected at full energy from the CEBAF in terms of emittance, bunch length, charge and repetition frequency. This design strategy ensures a high luminosity above 1034 s−1cm-2. A unique figure-8 shape collider ring is adopted for advantages of preserving ion polarization during acceleration and accommodation of a polarized deuteron beam for collisions. Our recent effort has been focused on completing this conceptual design as well as design optimization of major components. Significant progress has also been made in accelerator R&D including chromatic correction and dynamical aperture, beam-beam, high energy electron cooling and polarization tracking.