Electron dumps for ITER HNB and DNB beamlines

被引：16
作者：
de Esch, H. P. L. [1 ]
Singh, M. J. [2 ]
机构：
[1] CEN Cadarache, IRFM, F-13108 St Paul Les Durance, France
[2] ITER India, Inst Plasma Res, Gandhinagar 382428, Gujarat, India
来源：
FUSION ENGINEERING AND DESIGN | 2010年 / 85卷 / 05期
关键词：
Neutral beam; ITER; Accelerator; Spectrum; Electron trajectory; LONG-PULSE OPERATION; NEGATIVE-ION SOURCES; EXTRACTION;
D O I：
10.1016/j.fusengdes.2010.04.011
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：
The negative ion accelerators that produce the high-energy particle beams for the neutral injection systems for the International Tokamak Experimental Reactor (ITER) also produce unwanted particles such as electrons. These electrons are emitted in a wide angular spectrum that allows some of them to directly intercept sensitive beamline components such as the cryogenic pumps. As the electrons are also subject to backscattering, indirect interception always occurs. In this article the electron spectra produced by the Heating Neutral Beam (HNB) and Diagnostic Neutral Beam (DNB) accelerators are calculated. It is shown that these are very different. It is proposed to install electron dumps in the beamlines to intercept electron power directed towards inconvenient places in the HNB and DNB beamlines. (C) 2010 Elsevier B.V. All rights reserved.
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收藏
页码：707 / 717
页数：11
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