Local measurement of the lower-hybrid current drive using the O-mode cut-off in tokamaks
A new method for investigating the current-carrying superthermal tail using the electron-cyclotron O-mode at down-shifted frequency is proposed. Emission and transmission of radiation for propagation normal and abnormal to the magnetic field is discussed, with the emitting and receiving horns both located on the external side port of the equatorial plane, which requires a reflecting mirror. Here, the role of a perfectly reflecting mirror is played by the O-mode cut-off. Several applications are considered, and it is shown that the system allows local measurements of the tail properties.
Bibliographic Reference: Report: EUR-CEA-FC-1389(c) EN (1990) 9 pp.
Availability: Available from CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Record Number: 199011265 / Last updated on: 1994-12-01
Original language: en
Available languages: en