Generation of hot spots by fast electrons in lower hybrid grills

被引：21

作者：

Rantamaki, KM

Pattikangas, TJH

Karttunen, SJ

Litaudon, X

Moreau, D

机构：

[1] Aalto Univ, Assoc Euratom TEKES, FIN-02015 Helsinki, Finland

[2] Assoc Euratom TEKES, VTT Energy, FIN-02044 Espoo, Finland

[3] CEA Cadarache, Assoc Euratom CEA, Dept Rech Fus Controlee, F-13108 St Paul Les Durance, France

来源：

PHYSICS OF PLASMAS | 1998年 / 5卷 / 07期

关键词：

D O I：

10.1063/1.872940

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Generation of hot spots on plasma facing components magnetically connected to the grill is a main limiting factor in high-power operation of a lower hybrid system. A possible explanation for the hot spots is the sputtering caused by fast electrons generated by parasitic absorption of lower hybrid power near the grill mouth. The behavior of the edge plasma near the grill mouth is investigated with a new tool in this context: the self-consistent particle-in-cell (PIC) code XPDP2 [V. Vahedi et al., Phys. Fluids B 5, 2719 (1993)]. The PIC simulations provide the key parameters of the problem: the absorbed power, the radial deposition profiles, and the energy spectrum of the accelerated particles close to the grill. (C) 1998 American Institute of Physics. [S1070-664X(98)02207-1]

引用

页码：2553 / 2559

页数：7

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