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Abstract

Velocity anisotropy of the suprathermal population created by heating is known to influence sawtooth stabilisation in tokamaks. A realistic description of the hot ion distribution pitch angle dependence has been obtained in terms of easily accessible experimental data for on-axis ICRH in Tore Supra. A simple analytic model is developed, leading to the result that, contrary to the common presumption, sawtooth stabilisation with on-axis ICRH is driven by both passing and trapped hot ions. In Tore Supra discharges, the stabilising effect of closely passing hot ions is found to be dominant.

Additional information

Authors: ZABIÉGO M, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);GARBET X, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);BÉCOULET A, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);NGUYEN F, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);SAOUTIC B, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);ZABIEGO M, CEA, Departement de Recherches sur la Fusion Controlee, CEN Cadarache, Saint-Paul-lez-Durance (FR);BECOULET A, CEA, Departement de Recherches sur la Fusion Controlee, CEN Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: Report: EUR-CEA-FC-1510 EN (1994) 10 pp.
Availability: Available from CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Record Number: 199410371 / Last updated on: 1994-11-28
Category: PUBLICATION
Original language: en
Available languages: en