Intense electron cyclotron emission bursts during high power neutral beam heating on TFTR
Intense electron cyclotron emission bursts during high power neutral beam heating on TFTR
复制标题
TFTR 高功率中性束加热期间强烈的电子回旋发射爆发
DOI：
10.1088/0029-5515/32/10/i16
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发表时间：
1992
期刊：
影响因子：
3.3
通讯作者：
A. Ramsey
中科院分区：
文献类型：
--
作者：
G. Taylor;C. Bush;E. Fredrickson;H. Park;A. Ramsey
利用20通道光栅多色仪研究了由90-110 keV中性束加热的氘等离子体的强电子回旋辐射（ECE）（Pinj/Pob>30）。ECE爆发的持续时间为20-150 μs，通常出现在中性束注入开始后300-500 ms，此时储存的能量和中子产生正在崩溃或翻转。在大多数情况下，ECE突发具有约0.2-0.5的Δf/f。这些等离子体中的核心电子温度通常为7-12 keV。ECE爆发往往与ELM活动在限制器H模式，并出现在附近的Dalpha信号的上升开始。在某些情况下，ECE突发的谱宽较窄（Δ f/f << 0.1）。在这些情况下，ECE爆发表现出一个延迟，可以解释为源以（2-3）× 103 m/s的速度向外运动
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 (Pinj/Pob>30). The ECE bursts have a duration of 20-150 μs 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 Δf/f approximately 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 Dalpha signal. In some instances the spectral width of the ECE burst is narrow (Δ f/f << 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) × 103 m/s