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Kamiya, Junichiro
no journal, ,
Installation of the kickers in the extraction section of the RCS in J-PARC facility was completed. And they already succeeded to extract the proton beams accelerated up to 3GeV in the first beam test. The operation parameters of the kicker power supplies agreed well with the parameters which were estimated from the measurement. In this report, we summarized the operational status of the kicker power supplies.
Takayanagi, Tomohiro
no journal, ,
The pulse power supply of the shift bump magnet that installed in injection area of the J-PARC 3GeV RCS is required to excite the current at 20 kA during 1.3 ms. The power supply succeeded in a continuous driving of 24 hours in the factory. However, it was not possible to excite because of the switching noise in the RCS site. Then, bypass of the high frequency noise filter was processed. Moreover, the ground lines, which are the cable of 100 mm
between earth pole, power supply board, magnet and chopper board, respectively, have been changed to the sheet copper of 300 mm in width. In addition, the neutral point earth resistance in the series multiple connection of IGBT chopper was changed to the high resistance and the leakage current was controlled. As a result, the switching noise became 25 V or less and a steady driving became possible.
Watanabe, Yasuhiro; Tani, Norio; Adachi, Toshikazu*; Igarashi, Susumu*; Someya, Hirohiko*
no journal, ,
no abstracts in English