Kinetic-MHD hybrid equilibrium model using a Monte-Carlo calculation of runaway electron distribution function

逃走電子分布のモンテカルロ計算を用いた運動論的MHD平衡モデル

松山 顕之; 相羽 信行; 矢木 雅敏

Matsuyama, Akinobu; Aiba, Nobuyuki; Yagi, Masatoshi

An axisymmetric MHD equilibrium model is studied to allow the inclusion of both beam inertia and energy spectrum for runaway electron beam. Following kinetic-MHD hybrid approach, we evaluate the RE beam current from the integrals of the RE distribution function. The distribution function is here evaluated by a relativistic guiding-center trace code ETC-Rel, where we have implemented the effects of collisions, radiations, and exponential growth into the code. This paper applauds ETC-Rel to the parametric study of the MHD equilibrium with different RE beam parameters. A kinetic modification to the equilibrium becomes significant if the contribution of the beam inertia - being increased with the total electron mass of multi-MeV RE populations - becomes large enough to affect the radial force balance.