Radiation enhanced dielectric breakdown in insulating gase for NBI systems

被引：5

作者：

Hodgson, ER ^{[1
]}

Moroño, A ^{[1
]}

机构：

[1] EURATOM, CIEMAT Fus Assoc, Madrid 28040, Spain

来源：

FUSION ENGINEERING AND DESIGN | 2001年 / 56-57卷

关键词：

radiation; insulating gases; ITER; dielectric breakdown; NBI systems;

D O I：

10.1016/S0920-3796(01)00283-6

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：

During the operation of future machines such as ITER, insulating gases in the NBI systems will be subjected to a radiation field of the order of I Gy/s and hence the electric field threshold for dielectric breakdown could be modified. Radiation enhanced dielectric breakdown has been studied for N(2), CO(2), N(2)/CO(2) mixture, SF(6), and dry air at atmospheric pressure and 20 degreesC. Dry air, N(2), CO(2), and N(2)/CO(2) mixture all exhibit moderate radiation enhanced breakdown, with a reduction in the limiting voltage between 5 and 18% at 20 Gy/s. In contrast SF(6) does not. Following breakdown N(2) and CO(2) show no quenching of the breakdown current until the applied voltage is reduced to almost zero. Both dry air and SF(6) are good in terms of quenching the breakdown, (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：545 / 549

页数：5