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: 199111322 / Last updated on: 1994-12-02
Original language: en
Available languages: en