Publication: Quasi-coherent mode evolution in discharges with positive radial electric field at the T-10 tokamak
Дата
2021
Авторы
Drabinskiy, M. A.
Eliseev, L. G.
Khabanov, P. O.
Kharchev, N. K.
Melnikov, A. V/.
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© 2021 Institute of Physics Publishing. All rights reserved.The effect of the high-power ECRH on the quasi-coherent (QC) mode in the plasma of the T-10 tokamak with the magnetic field B= 2.2 T, plasma current = 230 kA and chordaveraged electron density <ne> ≈ 1·1019m-3is discussed. The most pronounced changes appear in the core plasma region with r < 0.5a. For the ECRH power PECRH= 2.2 MW causing the appearance of the positive radial electric field ErEC= +20 V/cm (in the OH stage, the occurring field is ErOH= -75 V/cm), the mean frequency of the QC-mode gradually decreases from fQCOH= 80-100 kHz (in the OH stage) to fQCEC= 20 kHz, and its frequency spread ΔfQCdecreases from ΔfQCOH= ±50 kHz to ΔfQCEC= ±10 kHz. For the ECRH power PECRH= 1.7 MW and weak negative radial electric field (ErEC= -20 V/cm), the mean frequency decreases to fQCEC= 40 kHz, and the frequency spread becomes ΔfQCEC= ±30 kHz. After the ECRH-induced drop, the QC-mode mean frequency increases with increasing line-averaged density.
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Quasi-coherent mode evolution in discharges with positive radial electric field at the T-10 tokamak / Drabinskiy, M.A. [et al.] // Journal of Physics: Conference Series. - 2021. - 2055. - № 1. - 10.1088/1742-6596/2055/1/012001