Development of 1 MeV H accelerator at JAEA for ITER NB

ITER NBに向けた1MeV負イオン加速器の開発

谷口 正樹; DeEsch, H. P. L.*; Svensson, L.*; 梅田 尚孝; 柏木 美恵子; 渡邊 和弘; 戸張 博之; 大楽 正幸; 坂本 慶司; 井上 多加志

Taniguchi, Masaki; DeEsch, H. P. L.*; Svensson, L.*; Umeda, Naotaka; Kashiwagi, Mieko; Watanabe, Kazuhiro; Tobari, Hiroyuki; Dairaku, Masayuki; Sakamoto, Keishi; Inoue, Takashi

This paper reports the recent activities at JAEA for the development of 1 MeV H ion accelerator toward ITER NBI. For the development of MAMuG accelerator, 320 mA H ion beam was successfully accelerated as the highest record in the world at the MeV class energy (796 keV). This was achieved by protecting the H ion source from the high heat load by the backstream positive ions, which was produced during the high current H ion acceleration. The SINGAP accelerator was tested at JAEA to compare the performance of the SINGAP and the MAMuG concept. The SINGAP accelerator was installed at the MeV test facility in JAEA and the beam acceleration test was performed. The MAMuG showed better performance in voltage holding capability and electron acceleration. From the results of this test, it was determined to select the MAMuG as the baseline accelerator for ITER NBI.