Experimental study of high power mm-waves scattering by plasma turbulence in TCV plasmas
1 Swiss Plasma Center, Ecole Polytechnique Fédérale de Lausanne, Switzerland
2 Max Planck Institute for Plasma Physics, Garching, Germany
3 Instituto di Fisica del Plasma, CNR, Milan, Italy
4 National Center for Scientific Research Demokritos, National Technical University of Athens, Greece
Published online: 23 October 2017
Understanding the propagation of high power mm-wave in plasmas is of tremendous importance in the route to fusion considering their extensive use in magnetically confined fusion devices. Mm-beams, launched from the outside of the vessel must propagate through plasma edge-turbulence before reaching their target region. Until recently, the effect of edge-turbulence on the beam propagation was neglected, but it has been estimated for ITER that it could lead to significant differences in the time-averaged and instantaneous beam profiles, leading to a loss of efficiency in their use. In this paper, we present first direct experimental measurements of high power beam after propagation in simple magnetized toroidal plasmas in TCV.
© The authors, published by EDP Sciences, 2017
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