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Title: Structure of the runaway electron loss during induced disruptions in TEXTOR

The loss of runaway electrons during an induced disruption is recorded by a synchrotron imaging technique using a fast infrared CCD camera. The loss is predominantly diffuse. During the “spiky-loss phase”, when the runaway beam moves close to the wall, a narrow channel between the runaway column and a scintillator probe is formed and lasts until the runaway beam is terminated. In some cases, the processed images show a stripe pattern at the plasma edge. A comparison between the MHD dominated disruptions and the MHD-free disruption is performed. A new mechanism of plasma disruptions with the runaway electron generation and a novel model which reproduces many characteristic features of the plasma beam evolution during a disruption is briefly described.
Authors:
; ;  [1] ;  [2] ;  [3] ;  [4]
  1. Institut für Laser- und Plasmaphysik, Heinrich-Heine Universität Düsseldorf, Düsseldorf 40225 (Germany)
  2. Institut für Energie- und Klimaforschung, Forschungszentrum Jülich GmbH, Jülich 52428 (Germany)
  3. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031 (China)
  4. Southwestern Institute of Physics, Chengdu 610041 (China)
Publication Date:
OSTI Identifier:
22486434
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 10; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CAMERAS; CHARGE-COUPLED DEVICES; IMAGES; MAGNETOHYDRODYNAMICS; PLASMA DISRUPTION; RUNAWAY ELECTRONS; TEXTOR TOKAMAK; WALLS