Author: Sun, L.P.
Paper Title Page
TUPB036 Design of Re-Buncher Cavity for Heavy-ion LINAC in IMP 558
  • L.P. Sun, X. Du, Y. He, A. Shi, C. Zhang, Z.L. Zhang
    IMP, Lanzhou, People's Republic of China
  A re-buncher with spiral arms for a heavy ion linear accelerator named as SSC-LNAC at HIRFL (the heavy ion research facility of Lanzhou) has been constructed. The re-buncher, which is used for beam longitudinal modulation and match between the RFQ and DTL, is designed to be operated in continuous wave (CW) mode at the Medium-Energy Beam-Transport (MEBT) line to maintain the beam intensity and quality. Because of the longitudinal space limitation, the re-buncher has to be very compact and will be built with four gaps. We determined the key parameters of the re-buncher cavity from the simulations using Microwave Studio software, such as the resonant frequency, the quality factor Q and the shunt impedance. The detailed design of a 53.667 MHz spiral cavity and measurement results of its prototype will be presented.  
THPB039 Design of a Four-Vane RFQ for China ADS Project 942
  • Z.L. Zhang, X. Du, Y. He, X. Jin, C. Li, Y. Liu, A. Shi, L.P. Sun, B. Zhang, H.W. Zhao
    IMP, Lanzhou, People's Republic of China
  • M.D. Hoff, A.R. Lambert, D. Li, J.W. Staples, S.P. Virostek
    LBNL, Berkeley, California, USA
  • J. Wang
    Lanzhou University of Technology, People's Republic of China
  • C. Zhang
    IAP, Frankfurt am Main, Germany
  A four-vane RFQ accelerator has been designed for the ADS project which has been launched in China since 2011. As one of the front ends of C-ADS LINAC, the RFQ works at a frequency of 162.5 MHz, accelerating the proton beam from 35 keV to 2.1 MeV. Due to the CW (continuous wave) operating mode, a small Kilpatric factor of 1.2 was adopted. At the same time, Pi-mode rods are employed to reduce the effect of dipole mode on quadrupole mode, and cavity tuning will be implemented by temperature adjustment of cooling water. Beam dynamics design, RF cavity design, thermal and stress analysis all will be presented in the paper.