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Title: On the possibility of reducing the instability threshold of a parametric decay of an extraordinary wave into two upper hybrid waves in an inhomogeneous plasma

A parametric decay instability (PDI) of an extraordinary wave leading to excitation of two upper hybrid (UH) plasmons at frequencies close to half the pump wave frequency is analyzed. It is shown that the two-plasmon PDI power threshold can be significantly reduced under conditions of electron cyclotron resonance heating (ECRH) experiments in toroidal magnetic devices, where the plasma density profile is often nonmonotonic, which leads to the localization of UH waves.
Authors:
;  [1]
  1. Russian Academy of Sciences, Ioffe Physical Technical Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22472428
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 120; Journal Issue: 1; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DECAY INSTABILITY; ECR HEATING; EXCITATION; INHOMOGENEOUS PLASMA; PARAMETRIC INSTABILITIES; PLASMA DENSITY; PLASMA WAVES; PLASMONS; TOKAMAK DEVICES