Speaker
Dr
Shinichiro Michizono
(High Energy Accelerator Research Organization (KEK))
Description
Twenty high power klystrons will be installed in the J-PARC linac. The rf fields
are
required to be stable less than +-1% in amplitude and +-1deg. in phase. The digital
feedback (FB) system using FPGAs are adopted so as to satisfy these requirements.
External monitors using wave-detectors and mixers are utilized for confirming the
stability. The measured stabilities are less than +-0.15% in amplitude and +-0.15
deg. in phase during the 500s flat-top. A tuner control system was tested and 18-
hour FB operation was also carried out.
Author
Dr
Shinichiro Michizono
(High Energy Accelerator Research Organization (KEK))
