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A novel scenario decreasing the saturation level of low-threshold two upper hybrid plasmon parametric decay instability of extraordinary wave

E Z Gusakov, A Yu Popov2021年Plasma Physics and Controlled FusionIF 2.2出版社

The effect of trapping a high harmonic ion Bernstein (IB) wave in a magnetic island possessing a plasma density maximum is predicted. The excitation of these waves in the course of secondary decays leading to saturation of the primary low-threshold two-upper-hybrid-plasmon parametric decay instability of the extraordinary pump wave is investigated. It is shown that the predicted IB wave trapping results in decreasing of the primary instability saturation level. Substantial suppression of the pump wave anomalous absorption due to the IB wave trapping effect is also foreseeing.

日本語訳

高調波イオンバーンスタイン波(IB波)が、プラズマ密度の最大値を有する磁気島に捕捉される効果が予測される。異常波の低閾値二重上ハイブリッドプラズモン・パラメトリック崩壊不安定性の飽和に至る二次崩壊の過程における、これらの波の励起が調査される。予測されたIB波の捕捉により、一次不安定性の飽和レベルが低下することが示される。IB波捕捉効果による異常波の異常吸収の実質的な抑制も予見される。

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Parametric decayDecay instabilityUpper hybrid
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