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Title: Use of soft x-ray diagnostic on the COMPASS tokamak for investigations of sawteeth crash neighborhood and of plasma position using fast inversion methods

The soft x-ray diagnostic is suitable for monitoring plasma activity in the tokamak core, e.g., sawtooth instability. Moreover, spatially resolved measurements can provide information about plasma position and shape, which can supplement magnetic measurements. In this contribution, fast algorithms with the potential for a real-time use are tested on the data from the COMPASS tokamak. In addition, the soft x-ray data are compared with data from other diagnostics in order to discuss possible connection between sawtooth instability on one side and the transition to higher confinement mode, edge localized modes and productions of runaway electrons on the other side.
Authors:
 [1] ;  [2] ; ; ; ;  [1] ;  [3] ;  [4] ;  [5] ;  [4] ;  [6] ;  [7]
  1. Institute of Plasma Physics ASCR, Prague (Czech Republic)
  2. (Czech Republic)
  3. Max-Planck-Institut für Plasmaphysik, Garching (Germany)
  4. Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague (Czech Republic)
  5. (United Kingdom)
  6. Institue Jean Lamour, Université de Lorraine, Nancy (France)
  7. ENS Cachan, Paris (France)
Publication Date:
OSTI Identifier:
22303718
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 11; Other Information: (c) 2014 Euratom; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPARATIVE EVALUATIONS; COMPASS-D TOKAMAK; EDGE LOCALIZED MODES; MONITORING; PLASMA; PLASMA CONFINEMENT; PLASMA DIAGNOSTICS; RUNAWAY ELECTRONS; SAWTOOTH OSCILLATIONS; SOFT X RADIATION