Doppler-Shifted Cyclotron Absorption of Electron Bernstein Waves via N ∥ -Upshift in a Tokamak Plasma
Doppler-Shifted Cyclotron Absorption of Electron Bernstein Waves via N ∥ -Upshift in a Tokamak Plasma
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托卡马克等离子体中 N ∥ 上移对电子伯恩斯坦波的多普勒频移回旋吸收
DOI：
10.1103/physrevlett.86.3783
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发表时间：
2001
影响因子：
8.6
通讯作者：
Y. Terumichi
中科院分区：
文献类型：
--
作者：
T. Maekawa;Tatsuo C. Kobayashi;S. Yamaguchi;K. Yoshinaga;H. Igami;M. Uchida;Hajime Tanaka;M. Asakawa;Y. Terumichi
在WT-3托卡马克中，为使电子伯恩斯坦$(B)$波加热到欧姆加热的等离子体中而垂直注入非凡的$(X)$波。测量结果表明，吸收既不发生在电子回旋共振层，也不发生在上层混合共振层，而是发生在两者之间。这与射线追踪预测是一致的，即极向场和环向场的极向不均匀性导致$B$波具有较大的平行折射率${N}_{\ensuremath{\parallel}}$ $(g1)$，并且$B$波通过多普勒位移回旋共振被衰减掉。
Extraordinary $(X)$ waves are perpendicularly injected for electron Bernstein $(B)$ wave heating into an Ohmically heated plasma from the inboard side in the WT-3 tokamak. Measurements show that absorption does not take place at the electron cyclotron resonance layer nor the upper hybrid resonance layer, but does happen midway between them. This is consistent with the ray tracing prediction, i.e., the poloidal field and poloidal inhomogeneity of toroidal field lead the $B$ waves to have a large parallel refractive index ${N}_{\ensuremath{\parallel}}$ $(g1)$, and the $B$ waves are damped away via the Doppler-shifted cyclotron resonance.