X-ray observations of central toroidal rotation in ohmic Alcator C-Mod Plasmas
X-ray observations of central toroidal rotation in ohmic Alcator C-Mod Plasmas
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DOI：
10.1088/0029-5515/37/3/i11
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发表时间：
1997-03
期刊：
影响因子：
3.3
通讯作者：
J. Rice;E. Marmar;F. Bombarda;L. Qu
中科院分区：
文献类型：
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作者：
J. Rice;E. Marmar;F. Bombarda;L. Qu
在AlcatorC-Mod托卡马克装置上，利用氩和钼X射线谱线的多普勒频移观测到欧姆等离子体中心存在杂质环向旋转。在放电的早期部分，当回路电压最高且电子密度最低时，旋转最高（约6 × 106 cm/s），然后在稳态期间通常稳定到≤ 2 × 106 cm/s的值。杂质旋转与电子环形漂移方向相同，与等离子体电流方向相反，当等离子体电流方向反转时，杂质旋转方向反转。钼离子和氩离子以相同的速度旋转。这些观察与新古典理论在定性上是一致的
Impurity toroidal rotation has been observed in the centre of ohmic plasmas in the Alcator C-Mod tokamak from the Doppler shifts of argon and molybdenum X-ray lines. The rotation is highest (~6 × 106 cm/s) in the early portion of the discharges, when the loop voltage is highest and the electron density is lowest, and then typically settles to values ≤ 2 × 106 cm/s during the steady state period. The impurity rotation is in the same direction as the electron toroidal drift, opposite to the plasma current, and reverses direction when the plasma current direction is reversed. Molybdenum and argon ions rotate with the same velocity. These observations are in qualitative agreement with neoclassical theory