Effect of radial electric field and bulk plasma velocity shear on ion thermal transport in Heliotron-E
Effect of radial electric field and bulk plasma velocity shear on ion thermal transport in Heliotron-E
复制标题
径向电场和整体等离子体速度剪切对 Heliotron-E 中离子热传输的影响
DOI：
10.1088/0741-3335/38/8/050
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
T. Obiki
中科院分区：
文献类型：
--
作者：
K. Ida;K. Kondo;K. Nagasaki;T. Hamada;S. Hidekuma;F. Sano;H. Zushi;T. Mizuuchi;H. Okada;S. Besshou;H. Funaba;Kiyomasa Y. Watanabe;T. Obiki
在Heliotron-E中研究了径向电场和速度剪切对热输运的影响。当中性束被注入到由电子回旋加速器加热产生的靶等离子体中（高模式）时，或者将冰球注入到NBI等离子体中（冰球注入模式）时，中心离子温度随时间增加到0.7 - 0.8 keV。这些高等离子体的特征在于峰值离子温度分布，并且与由具有低壁再循环的中性束加料或由颗粒加料产生的峰值电子密度分布相关联。与L模等离子体相比，对于相同的线平均电子密度，整体能量约束提高了1.4倍。所观察到的离子热传输的改善是有关的径向电场剪切，而不是在散装等离子体的旋转速度剪切。
The effect of radial electric field and velocity shear on thermal transport is studied in Heliotron-E. When neutral beams are injected into the target plasma produced by electron cyclotron heating (high mode), or an ice pellet is injected into an NBI plasma (pellet injection mode), the central ion temperature increases in time up to 0.7 - 0.8 keV. These high plasmas are characterized by a peaked ion temperature profile and are associated with a peaked electron density profile produced by neutral beam fuelling with low wall recycling, or by pellet fuelling. The global energy confinement is improved compared with L-mode plasmas by a factor of 1.4 for the same line-averaged electron density. The observed improvement in ion heat transport is related to the radial electric field shear rather than to the rotation velocity shear in the bulk plasma.