Onset condition of thermoelectric instability in divertor tokamaks
Onset condition of thermoelectric instability in divertor tokamaks
复制标题
偏滤器托卡马克热电不稳定性的起始条件
DOI：
10.1088/0029-5515/38/11/308
复制
发表时间：
1998
期刊：
影响因子：
3.3
通讯作者：
M. Ogasawara
中科院分区：
文献类型：
--
作者：
N. Hayashi;T. Takizuka;A. Hatayama;M. Ogasawara
本文采用基于SOL和偏滤器等离子体的五点模型，对偏滤器托卡马克中热不稳定性的起始条件进行了解析和数值研究。由于热电效应引起的SOL电流导致热电不稳定性，并且在临界偏滤器等离子体温度以下使SOL和偏滤器等离子体的对称平衡不稳定。热电不稳定性的临界温度等于或高于偏滤器辐射引起的热不稳定性的临界温度，并取决于中平面SOL等离子体温度和偏滤器辐射损失。在临界温度以下，得到稳定的不对称平衡。随着偏滤器等离子体温度不对称程度的增加，SOL电流对不稳定性没有影响，甚至稳定了平衡。SOL电流通过热电不稳定性自发产生偏滤器不对称性。
The onset condition of a thermoelectric instability in divertor tokamaks has been studied analytically and numerically by using a five point model based on SOL and divertor plasmas. The SOL current due to the thermoelectric effect causes the thermoelectric instability and destabilizes the symmetric equilibrium of the SOL and divertor plasmas below a critical divertor plasma temperature. The critical temperature of the thermoelectric instability is equal to or higher than that of the thermal instability due to the divertor radiation, and depends on the midplane SOL plasma temperature and the divertor radiation loss. Below the critical temperature, stable asymmetric equilibria are obtained. As the degree of the asymmetry in the divertor plasma temperature increases, the SOL current has no effect on the instability, or even stabilizes the equilibrium. The SOL current generates spontaneously the divertor asymmetry through the thermoelectric instability.
影响因子：
3.3
作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
通讯作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox