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 ∼50% turbulence-induced broadening of the beam cross-section. The role of core turbulence for the considered geometry is highlighted.

Chellai, O., Alberti, S., Furno, I., Goodman, T., Maj, O., Merlo, G., et al. (2021). Millimeter-wave beam scattering and induced broadening by plasma turbulence in the TCV tokamak. NUCLEAR FUSION, 61(6) [10.1088/1741-4326/abf43f].

Millimeter-wave beam scattering and induced broadening by plasma turbulence in the TCV tokamak

Bonanomi N.;Dal Molin A.;Feng S.;Gorini G.;Nocente M.;
2021

Abstract

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 ∼50% turbulence-induced broadening of the beam cross-section. The role of core turbulence for the considered geometry is highlighted.
Articolo in rivista - Articolo scientifico
electron-cyclotron resonant heating; full-wave simulations; ITER; Langmuir probes; millimeter-wave beam; millimeter-wave scattering; plasma turbulence;
English
2021
61
6
066011
none
Chellai, O., Alberti, S., Furno, I., Goodman, T., Maj, O., Merlo, G., et al. (2021). Millimeter-wave beam scattering and induced broadening by plasma turbulence in the TCV tokamak. NUCLEAR FUSION, 61(6) [10.1088/1741-4326/abf43f].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/481280
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