On the interaction of energetic electrons with a tearing mode in density-sweeping tokamak plasmas
On the interaction of energetic electrons with a tearing mode in density-sweeping tokamak plasmas
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关于密度扫描托卡马克等离子体中高能电子与撕裂模式的相互作用
DOI：
10.1088/0029-5515/55/6/063024
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发表时间：
2015-05
期刊：
影响因子：
3.3
通讯作者：
L Hu
中科院分区：
文献类型：
--
作者：
Erzhong Li;S. Lin;B. Shen;L Hu
我们详细研究了高能电子与m/n = 2/1撕裂模（m，n分别是极向和环形模数）之间的相互作用，这是通过主动控制体电子密度（Li et al 2014 Nucl. Fusion 54 042001）在故意实验中研究的。高能电子是由欧姆加热等离子体中的剩余回路电压产生的，在欧姆加热等离子体中经常观察到周期性的磁扰动脉冲。该模式的频率演变类似于高β等离子体中众所周知的鱼骨（m/n = 1/1）或“离轴”鱼骨（Heidbrink等人，2011 Plasma Phys. Control. Fusion 53 085028），但证明了撕裂模式的特征。特别是，它可以增加H-α辐射的平均强度作为模式的增长，这是从下面的振荡阶段的区别。的模式的动力学的强烈影响的背景电子密度的增加，这表明碰撞依赖。这与漂移动力学理论的预测定性一致。
We present a detailed study on the interaction between energetic electrons and the m/n = 2/1 tearing mode (m, n are respectively the poloidal and toroidal mode number) which was investigated in a deliberate experiment via actively controlling the bulk electron density (Li et al 2014 Nucl. Fusion 54 042001). Energetic electrons were generated by the residual loop voltage in the ohmically heated plasma where periodic bursts of magnetic perturbations were frequently observed. The frequency evolution of the mode is similar to the well-known fishbone (m/n = 1/1) or the ‘off-axis’ fishbone in high-beta plasma (Heidbrink et al 2011 Plasma Phys. Control. Fusion 53 085028), but demonstrates the characteristic of a tearing mode. In particular, it can increase the average intensity of H-alpha radiation as the mode grows, which is distinctive from the following oscillatory phase. The dynamics of the mode are strongly influenced by the increasing background electron density, suggesting a collisionality dependence. This qualitatively agrees with the prediction of a drift kinetic theory.
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影响因子：
8.6
作者：
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通讯作者：
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影响因子：
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