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Parametric upconversion of lower hybrid wave by runaway electrons in tokamak

Author: Animesh Mr Kuley
Requested Type: Poster Only
Submitted: 2009-12-03 05:44:01

Co-authors: C. S. Liu, V. K. Tripathi

Contact Info:
IIT Delhi
Hauz Khas
New Delhi, Delhi   110016

Abstract Text:
A kinetic formalism of parametric decay of a large amplitude lower hybrid pump wave into runaway electron mode and a uppersideband mode is investigated. The pump and the sideband exert a ponderomotive force on runaway electrons, driving the runaway mode. The density perturbation associated with the latter beats with the oscillatory velocity due to the pump to produce the sideband. The finite parallel velocity spread of the runaway electrons turns the parametric instability into a stimulated compton scattering process where growth rate scales as the square of the pump amplitude. The large phase velocity waves thus generated can potentially generate relativistic electrons.

Characterization: A3


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