Millimeter-Wave Beam Scattering And Induced Broadening By Plasma Turbulence In The Tcv Tokamak
NUCLEAR FUSION(2021)
摘要
The scattering of millimeter-wave beams from electron density fluctuations and the associated beam broadening are experimentally demonstrated. Using a dedicated setup, instantaneous deflection and (de-)focusing of the beam due to density blobs on the beam path are shown to agree with full-wave simulations. The detected time-averaged wave power transmitted through the turbulent plasma is reproduced by the radiative-transfer model implemented in the WKBeam code, which predicts a similar to 50% turbulence-induced broadening of the beam cross-section. The role of core turbulence for the considered geometry is highlighted.
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关键词
millimeter-wave beam, plasma turbulence, millimeter-wave scattering, Langmuir probes, full-wave simulations, electron-cyclotron resonant heating, ITER
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