INTENSE ELECTRON-CYCLOTRON EMISSION BURSTS DURING HIGH-POWER NEUTRAL BEAM HEATING ON TFTR

被引：24

作者：

TAYLOR, G

BUSH, CE

FREDRICKSON, ED

PARK, HK

RAMSEY, AT

机构：

[1] Plasma Phys. Lab., Princeton Univ., NJ

来源：

NUCLEAR FUSION | 1992年 / 32卷 / 10期

关键词：

D O I：

10.1088/0029-5515/32/10/I16

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A 20 channel grating polychromator has been used to study intense bursts of electron cyclotron emission (ECE) from TFTR deuterium plasmas predominantly heated by 90-110 keV neutral beams (P(inj)/P(oh) > 30). The ECE bursts have a duration of 20-150 mus and are usually seen 300-500 ms after the start of neutral beam injection, when the stored energy and neutron production are collapsing or rolling over. In most cases the ECE bursts have DELTAf/f is similar to 0.2-0.5. Core electron temperatures in these plasmas are typically 7-12 keV. The ECE bursts are often correlated with ELM activity during limiter H-modes and appear near the beginning of the rise in the D(alpha) signal. In some instances the spectral width of the ECE burst is narrow (DELTAf/f much less than 0.1). In these cases the ECE burst exhibits a delay which could be interpreted as an outwardly directed motion of the source with a velocity of (2-3) X 10(3) m/s.

引用

页码：1867 / 1872

页数：6

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