Characterization of edge pressure in the Large Helical Device
Characterization of edge pressure in the Large Helical Device
复制标题
大型螺旋装置中边缘压力的表征
DOI：
10.1088/0741-3335/44/5a/324
复制
发表时间：
2002
影响因子：
2.2
通讯作者：
K. Narihara
中科院分区：
文献类型：
--
作者：
H. Yamada;N. Ohyabu;K. Watanabe;S. Murakami;S. Sakakibara;K. Tanaka;R. Sakamoto;K. Ida;M. Osakabe;J. Miyazawa;B. Peterson;S. Morita;K. Narihara
在IPB 98（y，2）尺度上，LHD中净无电流等离子体的能量约束时间与q = 4.5的ELMy H模相当。宽温高边压是LHD的一个强特性，这使人想起托卡马克H模的基座结构。基本参数的依赖性，但是，弱陀螺玻姆在边缘和核心区域。这表明，一个物理模型可以解释观察到的轮廓。边缘温度与加热功率的平方根成正比，与边缘密度的平方根成反比。这意味着边缘压力及其梯度不受限制，并且可以通过加热功率来增加。
The energy confinement time of net current-free plasmas in the Large Helical Device (LHD) is comparable to ELMy H-mode with q = 4.5 on the scale of IPB98(y,2). Broad temperature with high edge pressure, which is of robust nature in LHD, recalls the pedestal structure in tokamak H-mode. Basic parameter dependence is, however, weak gyro-Bohm in both edge and core regions. This suggests that one physical model could explain the observed profile. The edge temperature is proportional to the square root of heating power and inversely proportional to the square root of edge density. This means that edge pressure and its gradient are not limited and can be increased by heating power.