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Title: A simplified, numerically verified model for the global plasma reaction on a local cooling

An analytical model for heat losses along a magnetic surface to its small region cooled down abruptly to a very low temperature is deduced by applying a principle of minimum entropy production and verified by comparing with the results obtained by solving non-stationary two-dimensional heat conduction equation numerically. The model is elaborated further by taking into account heat flux limit and the plasma density modification due to the particle convection along the magnetic surface, triggered by the plasma pressure imbalance arising by the local cooling.
Authors:
;  [1]
  1. Institut für Energie- und Klimaforschung-Plasmaphysik, Forschungszentrum Jülich GmbH, EURATOM Association, Trilateral Euregio Cluster, D-52425 Jülich (Germany)
Publication Date:
OSTI Identifier:
22218527
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 10; Other Information: (c) 2013 EURATOM; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CHARGED-PARTICLE TRANSPORT; COMPARATIVE EVALUATIONS; CONVECTION; COOLING; ENTROPY; HEAT FLUX; HEAT LOSSES; MAGNETIC SURFACES; MAGNETISM; NUMERICAL ANALYSIS; PLASMA DENSITY; PLASMA PRESSURE; THERMAL CONDUCTION; TWO-DIMENSIONAL CALCULATIONS; WALL EFFECTS