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Chinese Physics C> 2007, Vol. 31> Issue(8) : 774-777 

Study of the Digital LLRF System for STF

  •  Institute of High Energy Physics, CAS, Beijing 100049, China2 KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan

  • STF is a test facility for ILC which is under construction in KEK, Japan. The digital LLRF system is used to control the RF phase and amplitude inside the superconducting cavities. Because there is no real cavity to be controlled, a real time cavity simulator is designed to simulate the cavity response. An FPGA based cavity controller is designed to control the cavities. In the FPGA program, PI feedback and feed forward algorithm are adopted. Measurement shows that both the cavity simulator and the cavity controller work well.
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  • References

    [1] . Matsumoto T. Low-level RF System for STF. In: Oak Ridge National Laboratory. Proceedings of LINAC 2006.Knoxville: Oak Ridge National Laboratory, 20062. Michizono S, Anami S et al. Digital Feedback System for J-PARC Linac RF Source. In: DESY. Proceedings of LINAC2004. Hamburg: DESY, 2004. 742-7443. Zabolotny W M. FPGA Based Cavity Simulator for Tesla Test Facility. DESY, TESTLA Report 2003-22. 20034. Czarski T. TESLA Cavity Modeling and Digital Implemen-tation with FPGA Technology Solution for Control System Development. DESY, TESLA Report 2003-28. 20035. Schilcher T. Vector Sum Control of Pulsed Accelerating Fields in Lorentz Force Detuned Superconducting Cavities.Ph. D. Thesis of DESY, 1998

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GENG Zhe-Qiao, Michizono Shinichiro and Matsumoto Toshihiro. Study of the Digital LLRF System for STF[J]. Chinese Physics C, 2007, 31(8): 774-777.
GENG Zhe-Qiao, Michizono Shinichiro and Matsumoto Toshihiro. Study of the Digital LLRF System for STF[J]. Chinese Physics C, 2007, 31(8): 774-777. shu
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Received: 2006-11-10
Revised: 2007-01-04
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Study of the Digital LLRF System for STF

    Corresponding author: GENG Zhe-Qiao,
  • Institute of High Energy Physics, CAS, Beijing 100049, China2 KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
  • Received Date: 2006-11-10
  • Accepted Date: 2007-01-04
  • Available Online: 2007-08-05

Abstract: STF is a test facility for ILC which is under construction in KEK, Japan. The digital LLRF system is used to control the RF phase and amplitude inside the superconducting cavities. Because there is no real cavity to be controlled, a real time cavity simulator is designed to simulate the cavity response. An FPGA based cavity controller is designed to control the cavities. In the FPGA program, PI feedback and feed forward algorithm are adopted. Measurement shows that both the cavity simulator and the cavity controller work well.

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