WEP005 　ポスター①　 7月31日 1F大会議室 13:00-15:00

J-PARCにおける過去5年間のH-レーザー荷電変換の進捗状況

5 years progress of H- laser stripping at J-PARC RCS

○サハ プラナブ，原田 寛之，金正 倫計，吉本 政弘，山田 逸平（原子力機構, J-PARC センター），米田 仁紀，道根 百合奈，小野田 元喜（電通大, レーザー研），佐藤 篤（NAT），柴田 崇統，山根 功，入江 吉郎（KEK）

○Pranab Saha, Hiroyuki Harada, Michikazu Kinsho, Masahiro Yoshimoto, Ippei Yamada (JAEA, J-PARC), Hitoki Yoneda, Yurina Michine, Genki Onoda (UEC, ILS), Atsushi Sato (NAT), Takanori Shibata, Isao Yamane, Yoshiro Irie (KEK)

To overcome the issues and practical limitations associated with the stripper foil used of H- charge exchange injection, we aim to establish a foil-less H- charge exchange injection by using only lasers. For that purpose, we are about to start a POP (proof-of-principle) demonstration of 400 MeV H- stripping to proton at J-PARC RCS. The YAG laser system will be used for stripping two electrons in the H- beam, while a deep UV laser will also be used for exciting the deeply bound 2nd electron before stripping by the YAG laser. The YAG laser system and also a new type of multi-reflection cavity system has been developed through multiple experimental studies of 3 MeV H- beam neutralization at J-PARC RFQ-TF. We have also demonstrated non-destructive H- beam diagnostics at 3 MeV, which can be easily implemented at J-PARC linac for beam diagnostics at full intensity as well as online beam monitoring and feedback during user operation. The R&D of the deep UV laser of 213 nm producing from the YAG laser by the higher harmonic technique is also in progress. The laser system setup at J-PARC linac is good progress to start the POP study for 400 MeV H- beam at the end of this year.