IMPURITY RELEASE BY ICRF ANTENNAS IN JET

被引:14
作者
DIPPOLITO, DA [1 ]
MYRA, JR [1 ]
BURES, M [1 ]
STAMP, M [1 ]
JACQUINOT, J [1 ]
机构
[1] JET JOINT UNDERTAKING,ABINGDON OX14 3EA,OXON,ENGLAND
关键词
D O I
10.1016/0920-3796(90)90082-H
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 release of Faraday screen material into the plasma by a powered ICRF antenna is investigated in this report. JET spectroscopic data has been analyzed to give scalings of the metal impurity influx from a chromium-plated screen with antenna voltage and edge density. Modeling of the metal influx data by an RF sheath mechanism and scrape off layer model has been carried out including the sputtering contributions of deuterium and carbon ions and the self-sputtering of the Faraday screen material. The predictions of the model for JET parameters are compared with the Cr data and are also employed to investigate the sputtering influx of Be from Be-coated Faraday screens. © 1990.
引用
收藏
页码:209 / 216
页数:8
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