WEP050 　加速器技術／高周波加速空胴　 8月5日 小ホール 13:00 - 15:00

cERL主加速器クライオモジュール運転の現状-大電流ビーム運転時における空洞内の現象理解に向けて-

The operation status of the superconducting cavity for cERL main linac -Toward the deep understanding inside the superconducting cavity with high current beam-

○沼田 直人，浅川 智幸（日本アドバンストテクノロジー），阪井 寛志，梅森 健成，古屋 貴章，篠江 憲治，江並 和宏，江木 昌史，坂中 章悟，道園 真一郎，三浦 孝子，Qiu Feng，竹中 たてる，荒川 大，小島 裕二，本間 輝也，中西 功太（高エネルギー加速器研究機構），沢村 勝（日本原子力研究開発機構）

○Naoto Numata, Tomoyuki Asakawa (Nippon　Advanced　Technology　Co.,Ltd.), Hiroshi Sakai, Kensei Umemori, Takaaki Furuya, Kenji Shinoe, Kazuhiro Enami, Masato Egi, Shogo Sakanaka, Shinichiro Michizono, Takako Miura, Feng Qiu, Tateru Takenaka, Dai Arakawa, Yuuji Kojima, Teruya Homma, Kota Nakanishi (High Energy Accelerator Research Organization(KEK)), Masaru Sawamura (Japan Atomic Energy Agency,JAEA)

We started beam operation with Compact ERL(cERL) main linac cryomodule from 2013.Dec. Until now, we succeeded energy recovery with 80uA CW beam current of 20 MeV. For stable beam operation with more high current CW beam, it is nessesary to know the phenomina inside the superconducting cavity during beam operation, for example, increasing field emission. In order to know these phenomina,several fast monitors were set and monitored when the unexpected trip and/or radiation increase were occured with beam. In this paper, we describe the details of long-term operation experience of these cavities by using these monitors.