Suppression of Runaway Electrons by Resonant Magnetic Perturbations in TEXTOR Disruptions

Journal Article · Fri Jun 27 04:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.255003· OSTI ID:21134077

Lehnen, M; Bozhenkov, S A; Abdullaev, S S; Jakubowski, M W ^[1]

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1. Institute of Energy Research-Plasma Physics, Forschungszentrum Juelich GmbH, EURATOM Association, Trilateral Euregio Cluster, D-52425 Juelich (Germany)

The generation of runaway electrons in the international fusion experiment ITER disruptions can lead to severe damage at plasma facing components. Massive gas injection might inhibit the generation process, but the amount of gas needed can affect, e.g., vacuum systems. Alternatively, magnetic perturbations can suppress runaway generation by increasing the loss rate. In TEXTOR disruptions runaway losses were enhanced by the application of resonant magnetic perturbations with toroidal mode number n=1 and n=2. The disruptions are initiated by fast injection of about 3x10{sup 21} argon atoms, which leads to a reliable generation of runaway electrons. At sufficiently high perturbation levels a reduction of the runaway current, a shortening of the current plateau, and the suppression of high energetic runaways are observed. These findings indicate the suppression of the runaway avalanche during disruptions.

• OSTI ID: 21134077
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 100; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ARGON
FIRST WALL
GAS INJECTION
ITER TOKAMAK
PERTURBATION THEORY
RUNAWAY ELECTRONS
TEXTOR TOKAMAK
VACUUM SYSTEMS