Multichannel electron cyclotron emission radiometry for magnetohydrodynamic mode studies in TEXTOR

被引：18
|
作者：
Waidmann, G
deVries, PC
KramerFlecken, A
Eulenberg, HP
Huxhagen, K
机构：
[1] FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, ZENT LAB ELEKT, D-52425 JULICH, GERMANY
[2] MERCATOR UNIV DUISBURG, INST HOCHFREQUENZTECH, D-47048 DUISBURG, GERMANY
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 1997年 / 68卷 / 01期
关键词：
D O I：
10.1063/1.1147758
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Localized magnetohydrodynamic modes occur frequently as precursors to dangerous plasma disruptions in tokamaks. Fast electron cyclotron emission (ECE) radiometry permits a space-resolved study of the dynamic behavior of these instabilities. Two types of multichannel, heterodyne ECE systems working on TEXTOR are briefly described. Temperature profile perturbations caused by tearing modes are shown. Typical T-e fluctuations generated by rotating magnetic islands are presented. An early disruption warning system was built and tested on TEXTOR discharges. A real-time cross correlation calculation of two ECE signals is used to identify an m=2 mode. An analog alarm signal is generated then early during the instability evolution. An experimental test result is presented from a beam-heated tokamak plasma. (C) 1997 American Institute of Physics.
引用
收藏
页码：492 / 495
页数：4
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