Observation of the m=1 mode by microwave transmission measurements in the Tore Supra tokamak
Microwave transmission measurements in the Tore Supra tokamak exhibit low frequency oscillations of the transmitted power, associated with the presence of a saturated m = 1, n = 1 mode, as observed by soft X-ray diagnostics. It is shown that these oscillations are related to refraction effects and, specifically, to modulations of the electron density profile due to a rotating magnetic island. An analytical solution of the ray equations in the presence of a rotating density perturbation is found, explaining the frequency spectrum of the oscillations.
Bibliographic Reference: Report: EUR-CEA-FC-1424 EN (1991) 14 pp.
Availability: Available from CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Record Number: 199111183 / Last updated on: 1994-12-02
Original language: en
Available languages: en