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- W2022176504 abstract "LH power modulation was recently used at JET to quantify experimentally the LH current drive efficiency and power deposition. A new approach was applied for the analysis of the amplitude and phase of electron temperature Te perturbations δTe(kωo) at different harmonics k of the modulation frequency ωo. A solution of the Fokker‐Planck equation combined with heat transport modelling was used to study the dependence of the ratio of the perturbation of different harmonics k and n, δTe(kωo)/δTe(nωo), and the phase shift of the harmonics δφ(kωo) on the plasma parameters and electron distribution function plateau width, which is directly connected to the current drive efficiency. The results of the modelling were compared with the experimental data to estimate the current drive efficiency. In addition, LH power deposition profiles were deduced from the radial dependence of δφ(ωo). The maximum of the LH power deposition becomes more peripheral and with a reduced current drive efficiency at higher densities. In H‐..." @default.
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- W2022176504 date "2009-01-01" @default.
- W2022176504 modified "2023-10-13" @default.
- W2022176504 title "LH power modulation experiment on JET" @default.
- W2022176504 doi "https://doi.org/10.1063/1.3273763" @default.
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