Development of design technique for vacuum insulation in large size multi-aperture multi-grid accelerator for nuclear fusion

Kojima, Atsushi; Hanada, Masaya; Tobari, Hiroyuki; Nishikiori, Ryo; Hiratsuka, Junichi; Kashiwagi, Mieko; Umeda, Naotaka; Yoshida, Masafumi; Ichikawa, Masahiro; Watanabe, Kazuhiro; et al.

Review of Scientific Instruments, 87(2), p.02B304_1 - 02B304_5, 2016/02

https://doi.org/10.1063/1.4931803

Optimization techniques of the vacuum insulation design have been developed in order to realize a reliable voltage holding capability of Multi-Aperture Multi-Grid accelerators for giant negative ion sources for nuclear fusion. In this method, the nested multilayer configuration of each acceleration stage in the MAMuG accelerator can be uniquely designed to satisfy the target voltage within given boundary conditions. The evaluation of the voltage holding capabilities of each acceleration stages were based on the past experimental results of the area effect and the multi-aperture effect on the voltage holding capability. Moreover, total voltage holding capability of multi-stage was estimated by taking the multi-stage effect into account, which was experimentally obtained in this time. In this experiment, the multi-stage effect appeared as the superposition of breakdown probabilities in each acceleration stage, which suggested that multi-stage effect can be considered as the voltage holding capability of the single acceleration gap having the total area and aperture. The analysis on the MAMuG accelerator for JT-60SA agreed with the past gap-scan experiments with an accuracy of less than 10% variation.

Present status of 972 MHz RF teststand at JAERI, 2

Yamazaki, Masayoshi*; Chishiro, Etsuji; Hori, Toshihiko*; Suzuki, Hiroyuki*; Hasegawa, Kazuo

Proceedings of 28th Linear Accelerator Meeting in Japan, p.363 - 365, 2003/08

no abstracts in English

Development of a dc 1MV transmission line for the ITER neutral beam injector

Watanabe, Kazuhiro; Okumura, Yoshikazu; Ono, Yoichi*; Tanaka, Masanobu*

Heisei-13-Nen Denki Gakkai Zenkoku Taikai Koen Rombunshu, P. 3081, 2001/03

no abstracts in English

Performance of toroidally wide-separation loop antennae for JT-60U ICRF experiments

Fujii, Tsuneyuki; Saigusa, Mikio; Kimura, Haruyuki; Moriyama, Shinichi; Kubo, Hirotaka; Sugie, Tatsuo; Hosogane, Nobuyuki

Fusion Engineering and Design, 26, p.377 - 385, 1995/00

https://doi.org/10.1016/0920-3796(94)00204-K

no abstracts in English

Improvement of 1 MW long-pulse klystron for fusion application

Maebara, Sunao; Tsuneoka, Masaki; Yokokura, Kenji; Honda, Masao; Sawahata, Masayuki; Sakamoto, Keishi; Seki, Masami; Ikeda, Yoshitaka; Miyake, Setsuo*

Plasma Devices and Operations, 1(2), p.141 - 154, 1991/10

https://doi.org/10.1080/10519999108225535

no abstracts in English

High-Purity Germanium Diodes with 「Buffer Ring」

; ; *; *

JAERI-M 8069, 21 Pages, 1979/02

JAERI-M-8069.pdf:0.76MB

no abstracts in English