Low energy, high power hydrogen neutral beam for plasma heating

被引：27

作者：

Deichuli, P. ^{[1
]}

Davydenko, V. ^{[1
]}

Ivanov, A. ^{[1
]}

Korepanov, S. ^{[2
]}

Mishagin, V. ^{[1
]}

Smirnov, A. ^{[2
]}

Sorokin, A. ^{[1
]}

Stupishin, N. ^{[1
]}

机构：

[1] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[2] Tri Alpha Energy Inc, Foothill Ranch, CA 92610 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2015年 / 86卷 / 11期

基金：

俄罗斯科学基金会;

关键词：

INJECTION;

D O I：

10.1063/1.4936292

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A high power, relatively low energy neutral beam injector was developed to upgrade of the neutral beam system of the gas dynamic trap device and C2-U experiment. The ion source of the injector produces a proton beam with the particle energy of 15 keV, current of up to 175 A, and pulse duration of a few milliseconds. The plasma emitter of the ion source is produced by superimposing highly ionized plasma jets from an array of four arc-discharge plasma generators. A multipole magnetic field produced with permanent magnets at the periphery of the plasma box is used to increase the efficiency and improve the uniformity of the plasma emitter. Multi-slit grids with 48% transparency are fabricated from bronze plates, which are spherically shaped to provide geometrical beam focusing. The focal length of the Ion Optical System (IOS) is 3.5 m and the initial beam diameter is 34 cm. The IOS geometry and grid potentials were optimized numerically to ensure accurate beam formation. The measured angular divergences of the beam are +/- 0.01 rad parallel to the slits and +/- 0.03 rad in the transverse direction. (C) 2015 AIP Publishing LLC.

引用

页数：4

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