Investigation of gas puff induced fluctuation suppression in ADITYA tokamak
Investigation of gas puff induced fluctuation suppression in ADITYA tokamak
复制标题
ADITYA 托卡马克中气体喷流引起的波动抑制研究
DOI：
10.1088/0741-3335/51/9/095010
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
R. Tanna
中科院分区：
文献类型：
--
作者：
R. Jha;A. Sen;P. Kaw;P. Atrey;S. Bhatt;N. Bisai;K. Tahiliani;R. Tanna
报道了一项旨在研究ADITYA托卡马克边缘和刮除层等离子体中气体喷吹抑制波动原因的实验。波动抑制伴随着浮动电位、等离子体密度和静电雷诺应力的径向分布的平坦化。波动抑制和粒子通量同时减少都发生在等离子体边缘的整个观察区域。测辐射热计数据还显示，在吹气期间，边缘辐射从输入功率的 20% 增加到 40%。这些结果表明边缘冷却在波动抑制机制中的重要作用，并且可以通过与电子温度梯度相关的交换不稳定性的增长率的伴随降低得到很好的解释。
An experiment aimed at investigating the cause of fluctuation suppression by gas puffing in the edge and scrape-off layer plasma of the ADITYA tokamak is reported. The fluctuation suppression is accompanied by a flattening of the radial profiles of the floating potential, plasma density and electrostatic Reynolds stress. Both the fluctuation suppression and the simultaneous reduction in particle flux occur throughout the observed region of the plasma edge. The bolometer data also show an increase in the edge radiation from 20% to 40% of the input power during the gas puff. These results indicate a significant role of edge cooling in the fluctuation suppression mechanism and are shown to be well explained in terms of a concomitant reduction in the growth rate of the interchange instability associated with the electron temperature gradient.