Electromagnetic analysis of breakdown conditions in JET

被引：11

作者：

Maviglia, F. ^{[1
]}

Albanese, R. ^{[1
]}

Alonso, A. ^{[3
]}

Lomas, P. J. ^{[4
]}

机构：

[1] Univ Naples Federico II, Assoc EURATOM ENEA CREATE, I-80125 Naples, Italy

[2] Culham Sci Ctr, JET EFDA, Abingdon OX14 3DB, Oxon, England

[3] CIEMAT, Asociac EURATOM CIEMAT Fus, E-28040 Madrid, Spain

[4] Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England

来源：

FUSION ENGINEERING AND DESIGN | 2011年 / 86卷 / 6-8期

关键词：

Tokamak; Plasma; Breakdown; Electromagnetic modeling;

D O I：

10.1016/j.fusengdes.2010.12.042

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

This paper presents the breakdown studies carried out in the framework of JET Enhancement Projects for Plasma Control Upgrade (PCU) and Enhanced Radial Field Amplifier (ERFA), to obtain plasma formation with different sets of coil turns in the radial field circuit. The electromagnetic conditions to reach the plasma breakdown in the JET machine are strongly dependent on the properties of JET iron core and the effects of the eddy currents driven by the transient electric field on the present passive structures. The study has been carried out by using a linearized dynamic model of JET provided by 2D axisymmetric finite element code CREATE-L [R. Albanese, et al., Nucl. Fusion 38 (1998) 723-738]. The dynamic simulations have been compared with the experimental data. A new fast visible camera has been installed and has been used for the first time at JET for studies of plasma breakdown. The images show, coherently with the model, that the avalanche evolves dynamically towards a region where the stray field is perpendicular to the first wall. (C) 2010 EURATOM. Published by Elsevier B.V. All rights reserved.

引用

页码：675 / 679

页数：5

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