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Energy dependence of runaway electron losses due to MHD modes

MHDモードによる逃走電子損失のエネルギー依存性について

松山 顕之; 相羽 信行; 奴賀 秀男; 石井 康友; 矢木 雅敏

Matsuyama, Akinobu; Aiba, Nobuyuki; Nuga, Hideo; Ishii, Yasutomo; Yagi, Masatoshi

We report the simulation study of the RE drift orbit induced by macroscopic MHD modes using the relativistic guiding-center Monte-Carlo code ETC-Rel with its extension to treat the electron orbit in the vacuum region and strike points on the first wall. The structure of MHD modes is modeled by analytic expressions, the linear stability code MARG2D, and the reduced MHD code. We investigate the energy dependence of the RE transport and losses systematically for different types of perturbations that represent internal kink, tearing, and external kink modes. Near the stochastic threshold of the RE drift orbit, a significant effect of the drift resonance on the RE confinement has been identified, which contributes to both enhancement and suppressions of the stochasticity of the RE drift orbit. In addition to these specific results, we also discuss the status of our developments for disruption integrated simulation code with runaway electrons.

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