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Parametric decay instabilities of the fast wave in the lower hybrid frequency regime

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Author: Atul Kumar; Sharma, R P; Tripathi, Y K; Al-Janabi, A Hadi

Advisor: Advisor

Date: 1991

Publisher:
Citation: Plasma Sci

Series/Report no.:
Item Type: Article

Keywords: lower hybrid frequency; ion-acoustic wave; homogeneous thresholds; convective thresholds; tokamak plasma; magnetospheric plasmas

Abstract: Three possible delay instabilities of the fast wave in the lower hybrid frequency regime are presented. It has been considered that a fast wave may decay into a high-frequency, lower hybrid wave and a low-frequency wave, either the ion-Bernstein wave, ion-acoustic wave, or kinetic Alfven wave. Explicit expressions for growth rates, homogeneous thresholds, and convective thresholds have been given. Applications have been pointed out in tokamak plasma during current drive experiments and magnetospheric plasmas. For example, for PLT tokamak parameters, the convective threshold for the decay instability of the fast wave into lower hybrid and ion acoustic wave is ~180 W/cm2
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Shankar B. Chavan
Computer Applications Division
Central Library, IIT Delhi
shankar.chavan@library.iitd.ac.in
NDLTD
Shodhganga
NDL
ePrints@IISc
etd@IISc
IR@IIT Bombay
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