Decay instability in a plasma channel

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Date
1998
Authors
Ramachandran, K
Tripathi, V K
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Abstract
Near the critical layer, a large-amplitude laser beam creates a transverse plasma channel due to the ponderomotive force. The axis of the channel is normal to the ambient density gradient. Inside the channel, the laser beam decays into counter-propagating ion acoustic and Langmuir waves. A nonlocal theory of the process is developed for a parabolic density profile. The growth rate of the instability is significantly reduced due to the nonlocal effects
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Keywords
large-amplitude laser beam, transverse plasma, ponderomotive force, counter-propagating ion acoustic
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