Characteristics of co-extracted electron beam current in sheet plasma-type cesium-free negative-ion source

被引：1

作者：

Kaminaga, Hiroki ^{[1
]}

Takimoto, Toshikio ^{[2
]}

Tonegawa, Akira ^{[1
,2
]}

Sato, Kohnosuke ^{[3
]}

机构：

[1] Tokai Univ, Grad Sch Sci, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 2591292, Japan

[2] Tokai Univ, Grad Sch Sci & Technol, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 2591292, Japan

[3] Tokyo Univ Sci, Shinjuku Ku, 1-3 Kagurazaka, Tokyo 1628601, Japan

来源：

FUSION ENGINEERING AND DESIGN | 2021年 / 168卷

关键词：

Neutral beam heating; Negative ion source; Cs-free; Volume production; Sheet plasma;

D O I：

10.1016/j.fusengdes.2021.112676

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

In this study, we designed a magnetized-sheet plasma produced by TPDsheet-U (Test plasma Produced by Direct current for sheet plasma upgrade) to produce and control negative hydrogen ions in plasma. A negative hydrogen ion (H-) is produced by volume production and extracted from the peripheral of the magnetized-sheet plasma by a two-grid system. This study represents the basic design of a single-aperture grid and the characteristics of the developed extraction system on TPDsheet-U. The reduction of the co-extraction electron current is a common and essential issue for the negative-ion source. Co-extracted electrons are successfully suppressed by setting a soft magnetic plate on plasma grid. We investigate herein the effects of the developed extraction system on the extracted H- and co-extracted electron beam current.

引用

页数：4

共 22 条

[1] Characteristics of extracted ion beam from a cesium-free negative ion source using sheet plasma
Kaminaga, H.
Takimoto, T.
Tonegawa, A.
Sato, K. N.
REVIEW OF SCIENTIFIC INSTRUMENTS, 2020, 91 (11):
[2] Characteristics of the extracted negative-ion beam in a cesium-free negative-ion source using TPDsheet-U
Tonegawa, A.
Kaminaga, H.
Hanai, K.
Takimoto, T.
Sato, K. N.
Kawamura, K.
NUCLEAR FUSION, 2021, 61 (10)
[3] Characteristics of cesium-free negative hydrogen/deuterium ion source by sheet plasma
Hanai, Keito
Ishihara, Shogo
Endo, Ryuta
Takimoto, Toshikio
Tonegawa, Akira
Sato, Kohnosuke
FUSION ENGINEERING AND DESIGN, 2019, 146 : 2721 - 2724
[4] Characteristics of extracted ion beam of cesium-free negative ion source TPDsheet-U
Tonegawa, Akira
Kaminaga, Hiroki
Takimoto, Toshikio
29TH INTERNATIONAL SYMPOSIUM ON DISCHARGES AND ELECTRICAL INSULATION IN VACUUM (ISDEIV 2020), 2021, : 450 - 453
[5] Development of Cesium-Free Negative Ion Source by Using High Density Sheet Plasma
Ishihara, Shogo
Takimoto, Toshikio
Endo, Ryuta
Tonegawa, Akira
Sato, Kohnosuke
Kawamura, Kazutaka
PROCEEDINGS OF THE 17TH INTERNATIONAL CONFERENCE ON ION SOURCES, 2018, 2011
[6] Difference of co-extracted electron current and beam acceleration in a negative ion source with hydrogen-isotope ions
Ikeda, K.
Tsumori, K.
Nakano, H.
Nagaoka, K.
Takeiri, Y.
Masaki, S.
Rattanawongnara, E.
Osakabe, M.
19TH INTERNATIONAL CONFERENCE ON ION SOURCES - ICIS2021, 2022, 2244
[7] Effects of the magnetic field topology on the co-extracted electron current in a negative ion source for fusion
Wunderlich, D.
Montellano, I. M.
Lindqvist, M.
Mimo, A.
Mochalskyy, S.
Fantz, U.
JOURNAL OF APPLIED PHYSICS, 2021, 130 (05)
[8] Co-extracted electrons and beam inhomogeneity in the large negative ion source SPIDER
Pimazzoni, Antonio
Agostini, Matteo
Brombin, Matteo
Marconato, Nicolo
Sartori, Emanuele
Pasqualotto, Roberto
Serianni, Gianluigi
FUSION ENGINEERING AND DESIGN, 2021, 168
[9] Exploring deuterium beam operation and the behavior of the co-extracted electron current in a negative-ion-based neutral beam injector
Ikeda, K.
Tsumori, K.
Nakano, H.
Kisaki, M.
Nagaoka, K.
Kamio, S.
Fujiwara, Y.
Haba, Y.
Osakabe, M.
NUCLEAR FUSION, 2019, 59 (07)
[10] Development of Cs-Free Negative-Ion Source by Sheet Plasma
Hanai, Keito
Takimoto, Toshikio
Kaminaga, Hiroki
Tonegawa, Akira
Sato, Kohnosuke
Kawamura, Kazutaka
PLASMA AND FUSION RESEARCH, 2020, 15 (15):

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