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Abstract

During the current quenching after a major disruption, a part of the stored magnetic energy is dissipated in the center of a post-disruptive plasma. This period has been experimentally investigated in the TFR tokamak. The plasma resistance is found in agreement with its value expected from Spitzer law. The energy balance is dominated by conduction and convection in the core of the plasma and by charge exchange and radiation at the edge. The most probable mechanism to explain the large value of the heat conductivity (10**7 cm**2s**-1) is parallel transport along ergodic field lines. Consequences for the scaling law of the current decrease rate are discussed.

Additional information

Authors: TFR GROUP CEA, FONTENAY-AUX-ROSES (FRANCE), CEA, FONTENAY-AUX-ROSES (FRANCE)
Bibliographic Reference: WRITE TO CEA MENTIONING REPORT EUR-CEA-FC-1226 EN, 1984
Availability: Can be ordered online
Record Number: 1989123024600 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en