Physics of plasma burn-through and DYON simulations for the JET ITER-like wall

被引：21
|
作者：
Kim, Hyun-Tae [1 ,2 ]
Sips, A. C. C. [1 ,3 ]
机构：
[1] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England
[2] EURATOM CCFE Fus Assoc, Abingdon OX14 3DB, Oxon, England
[3] Culham Sci Ctr, JET EFDA, Abingdon OX14 3DB, Oxon, England
来源：
NUCLEAR FUSION | 2013年 / 53卷 / 08期
关键词：
START-UP; IMPURITIES; RELEASE; MODEL;
D O I：
10.1088/0029-5515/53/8/083024
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：
This paper presents the DYON simulations of the plasma burn-through phase at Joint European Torus (JET) with the ITER-like wall. The main purpose of the study is to validate the simulations with the International Thermonuclear Experimental Reactor (ITER)-like wall, made of beryllium. Without impurities, the burn-through process of a pure deuterium plasma is described using DYON simulations, and the criterion for deuterium burn-through is derived analytically. The plasma burn-through with impurities are simulated using wall-sputtering models in the DYON code, which are modified for the ITER-like wall. The wall-sputtering models and the validation against JET data are presented. The impact of the assumed plasma parameters in DYON simulations are discussed by means of parameter scans. As a result, the operation space of prefill gas pressure and toroidal electric field for plasma burn-through in JET is compared with the Townsend avalanche criterion.
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页数：16
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