Bootstrap Current Generated by Alpha Particles
Bootstrap Current Generated by Alpha Particles
复制标题
Alpha 粒子产生的自举电流
DOI：
10.1143/jpsj.61.4443
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发表时间：
1992
影响因子：
1.7
通讯作者：
M. Taguchi
中科院分区：
文献类型：
--
作者：
M. Taguchi
通过求解轴对称等离子体中同时存在阻力和俯仰角散射的漂移动力学方程，导出了由聚变产生的α粒子引起的自举电流密度表达式。由这个表达式，明确地计算了D-T等离子体在圆形截面托卡马克中的α粒子诱导自举电流。评估结果表明，对于目前考虑的燃烧等离子体，该自举电流与体积粒子引起的电流之比不会成为一个大的值。然而，将自举电流用于电流轮廓控制和种子电流用于稳态托卡马克是可能的。
The expression for the bootstrap current density due to fusion-produced alpha particles is derived in an axisymmetric plasma by solving a drift kinetic equation in the presence of both drag and pitch-angle scattering. From this expression the alpha-particle induced bootstrap current for a D-T plasma is explicitly evaluated in a tokamak with circular cross-section. The evaluated results show that the ratio of this bootstrap current to that due to bulk particles does not become a large value for burning plasmas presently considered. However, the use of this bootstrap current for current profile control and a seed current for a steady-state tokamak may be possible.