Author: Xia, J.W.
Paper Title Page
PO14 Feedback of Slow Extraction in CSRm 89
  • J. Shi, W.P. Chai, J. Li, J.W. Xia, J.C. Yang, Y.J. Yuan
    IMP, Lanzhou, People's Republic of China
  The transverse tune of the beam in the synchrotron will fluctuate due to the quadrupole current ripple, which lead the spill ripple through the variation of the separatrices area. In order to reduce the ripple of the spill, a pair of fast response quadrupole (FQ) is adopted to compensate the tune ripple caused by other quadrupoles. After using the FQ feedback, the amplitude of the spill ripple within 800Hz has been reduced to 1/10 times from the normal mode. This method will be used in the HITFiL (Heavy Ion Therapy Facility in Lanzhou).  
THA03 Status and Upgrade Project of HIRFL 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.  
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