Electron burst driven by near electric field effects of lower-hybrid launchers

Hot spot generation by Lower Hybrid (LH) launchers is found to be governed by a resonance in the plasma electric field response to the external drive. The kinetic analysis in 1D-1V in the parallel direction allows one to compute the amplification effect for small amplitude of the external drive. The...

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Published inContributions to plasma physics (1988) Vol. 58; no. 6-8; pp. 465 - 470
Main Authors Valade, L, Ekedahl, A., Ghendrih, P, Sarazin, Y., Asahi, Y., Bufferand, H., Caschera, E., Di Cintio, P., Ciraolo, G., Dif-Pradalier, Guilhem, Donnel, P. Peter, Garbet, X., Giorgi, P.-A, Grandgirard, V., Latu, G., Lepri, S., Livi, R., Nouri, A., Serre, E.
Format Journal Article
LanguageEnglish
Published Wiley-VCH Verlag 01.07.2018
Subjects
Classical Physics
Computational Physics
Condensed Matter
Fluid Dynamics
Fluid mechanics
Mechanics
Physics
Plasma Physics
Statistical Mechanics
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Summary:Hot spot generation by Lower Hybrid (LH) launchers is found to be governed by a resonance in the plasma electric field response to the external drive. The kinetic analysis in 1D-1V in the parallel direction allows one to compute the amplification effect for small amplitude of the external drive. The resonant Lorentzian response distorts the distribution function with an island structure in the suprathermal part at the phase velocity of the external electrostatic drive. The non-linear features enhance the plasma response driving overlap effects between multiple waves at rather low amplitude. The onset of a plateau in the distribution function with extent up to one thermal velocity is already obtained when the standard overlap condition is achieved. The sensitivity of the resonance to plasma parameters and large variation of the amplification magnitude can compensate the fast radial decay of 1
ISSN:0863-1042
1521-3986
DOI:10.1002/ctpp.201700156