First experiments of 3rd harmonic electron cyclotron resonance heating in TCV Tokamak plasmas
High power electromagnetic waves in the millimetre wavelength region can be used as an efficient and localized electron heating of Tokamak plasmas. The absorption takes place on a thin layer whose location depends on the harmonic of the local electron cyclotron frequency. Third harmonic extraordinary mode in the TCV Tokamak with top launch injection results as a compromise between heating of high density plasma (up to 1.2 x 10(E20) m(E-3) and the optimisation of single-pass absorption. The single-pass absorption in a top launch injection strongly depends on plasma refraction. In this launching configuration, the sensitivity of single-pass absorption on injection geometry is experimentally studied with an RF power as high as 500 kW. A comparison of the experimental results with a linear ray-tracing code will be presented.
Bibliographic Reference: An oral report given at: Jahrestagung in Lausanne Organised by: Swiss Physical Society Held at: Lausanne (CH), 28 February to 1 March 2002
Record Number: 200214454 / Last updated on: 2002-03-08
Original language: en
Available languages: en