Determination of the radial profile of rf-driven current by cyclotron radiation below the plasma frequency
The measurement of the spatial distribution of the lower hybrid driven current in tokamaks using electron cyclotron wave attenuation of the ordinary mode at frequencies below the plasma frequency is discussed. It is shown that the rf-driven current density profile can be determined by differential transmission measurements of two equivalent rays propagating near the horizontal plane and reflected by the cut-off layer. An application to lower hybrid current drive in JET is presented.
Bibliographic Reference: Report: EUR-CEA-FC-1416 EN (1991) 25 pp.
Availability: Available from CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Record Number: 199110869 / Last updated on: 1994-12-02
Original language: en
Available languages: en