LIPAc personnel protection system for realizing radiation licensing conditions on injector commissioning with deuteron beam

重水素ビームによる入射器コミッショニングにおける許認可に係るLIPAc人員保護システム

高橋 博樹  ; 成田 隆宏; 春日井 敦; 小島 敏行*; Marqueta, A.*; 西山 幸一*; 榊 泰直; Gobin, R.*

Takahashi, Hiroki; Narita, Takahiro; Kasugai, Atsushi; Kojima, Toshiyuki*; Marqueta, A.*; Nishiyama, Koichi*; Sakaki, Hironao; Gobin, R.*

To apply the radiation licensing for the LIPAc Injector commissioning, the entering/leaving to/from accelerator vault should be under control and entering into the accelerator vault has to be prohibited for any person during the beam operation. The Personnel Protection System (PPS) was developed to adapt the radiation licensing conditions. The licensing requests that PPS must manage the total of D current. So, to manage the D beam accumulation during injector operation, Pulse Duty Management System (PDMS) was developed as one of the configuration devices of the PPS. The PDMS was tested during H beam operation, to confirm that it inhibits the beam from Injector before the beam accumulation is above the threshold value specified in the radiation licensing condition. The design and configuration of these systems and the result of the tests are presented.