Vacuum insulation of the high energy negative ion source for fusion application

Journal Article · Wed Feb 15 00:00:00 EST 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3672471· OSTI ID:22075527

Kojima, A; Hanada, M; Inoue, T; Watanabe, K; Taniguchi, M; Kashiwagi, M; Umeda, N; Tobari, H ^[1]; Hilmi, A; Kobayashi, S; Yamano, Y ^[2]; Grisham, L R ^[3]

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1. Japan Atomic Energy Agency, Naka, Ibaraki 311-0193 (Japan)
2. Saitama University, Saitama, Saitama-ken, 338-8570 (Japan)
3. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)

Vacuum insulation on a large size negative ion accelerator with multiple extraction apertures and acceleration grids for fusion application was experimentally examined and designed. In the experiment, vacuum insulation characteristics were investigated in the JT-60 negative ion source with >1000 apertures on the grid with the surface area of {approx}2 m{sup 2}. The sustainable voltages varied with a square root of the gap lengths between the grids, and decreased with number of the apertures and with the surface area of the grids. Based on the obtained results, the JT-60SA (super advanced) negative ion source is designed to produce 22 A, 500 keV D{sup -} ion beams for 100 s.

• OSTI ID: 22075527
• Journal Information: Review of Scientific Instruments, Vol. 83, Issue 2; Conference: ICIS 2011: 14. international conference on ion sources, Giardini-Naxos, Sicily (Italy), 12-16 Sep 2011; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ACCELERATORS
ANIONS
APERTURES
BEAM EXTRACTION
DEUTERIUM IONS
ELECTRIC POTENTIAL
FUSION HEAT
ION BEAMS
ION SOURCES
JT-60 TOKAMAK
KEV RANGE
SURFACE AREA
VACUUM SYSTEMS