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Abstract

An explicit expression for the local power absorption density in a uniformly magnetised slab plasma is derived from the Vlasov-Maxwell equations, taking into account density and temperature gradients. Using a transformation to Lagrangian coordinates, the kinetic flux of energy due to particle streaming can be separated in a unique way from the actual power dissipation. Computations using this expression show how equilibrium gradients play a role in the modelling of low-frequency Alfvén wave heating, and give a threshold below which the gradient effects are important in a medium size tokamak.

Additional information

Authors: JAUN A, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Lausanne (CH);VACLAVIK J, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Lausanne (CH);APPERT K, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Lausanne (CH)
Bibliographic Reference: Report: LRP 412/90 EN (1990) 17 pp.
Availability: Available from Confédération Suisse, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, 21 avenue des Bains, 1007 Lausanne (CH)
Record Number: 199011472 / Last updated on: 1994-12-02
Category: PUBLICATION
Original language: en
Available languages: en