Improvement of voltage holding capability in a giant negative ion source for fusion application

Hanada, Masaya; Kojima, Atsushi; JT-60NBI Group; Yamano, Yasushi*; Kobayashi, Shinichi*

Denki Gakkai Kenkyukai Shiryo, Hoden Kenkyukai (ED-12-35), 6 Pages, 2012/03

http://ci.nii.ac.jp/naid/10030603937

Negative ion accelerator for neutral beam injectors for fusion appliaction has large-area acceleration grids of 1 m and an insulator made of Fiber Reinforced Plastics (FRP), which are extremely larger than those used in the accelerators for industrial and acceleration applications. This paper reports vacuum insulation character its and development for the improvement of voltage holding capability towards JT-60SA.