Kobayashi, Tetsuya; Michizono, Shinichiro*; Fang, Z.*; Matsumoto, Toshihiro*; Suzuki, Hiroyuki; Yamaguchi, Seiya*; Okada, Yoshihito*
A 972-MHz RF system is being developed for 400-MeV upgrade of the J-PARC linac. The accelerating field stabilities should be less than 
1% in amplitude and 1
in phase. The basic digital LLRF (Low-Level RF) concept is the same as that of the present 324-MHz system with a compact-PCI crate. The main alterations are RF and clock generator (RF&CLK), mixer and I/Q modulator (IQ&Mixer) and digital LLRF algorithm. Since the typical decay time of the new system is faster (because its operational frequency is higher than that of the present 324-MHz cavity), chopped beam compensation is essential. The performance study of the digital feedback system with a cavity simulator is summarized.
Language |
: | Japanese |
|---|---|---|
Journal |
: | Proceedings of 6th Annual Meeting of Particle Accelerator Society of Japan (CD-ROM) |
Volume |
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Number |
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Pages |
: | p.1068 - 1070 |
Publication Year/Month |
: | 2010/03 |
Meeting title |
: | |
Held date |
: | 2009/08 |
Location (city) |
: | 東海 |
Location (country) |
: | 日本 |
Paper URL |
: |
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Keywords |
: | no keyword |
Research Facility |
: |
Accesses |
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