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Stabilization of Low-Threshold Two-Plasmon Parametric Decay Instability with Oblique Microwave Incidence on the Plasma

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Abstract

It is shown that, when a pump extraordinary wave is obliquely incident onto the plasma in the electron cyclotron resonance heating (ECRH) experiments, an increase takes place in the threshold of parametric decay instability (PDI) leading to generation of two localized upper-hybrid waves. It is proposed to use a small tilt of the heating beam to suppress this PDI which is most dangerous and often observed in the ECRH experiments.

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Funding

Analytical investigation was supported by the Russian Scientific Foundation grant 22-12-00010; numerical simulation was supported by the Ioffe Institute State Contract 0040-2019-0023; the program code for PDI modeling was developed under the Ioffe Institute State Contract 00342021-0002.

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  1. Ioffe Institute, St. Petersburg, Russia

    E. Z. Gusakov & A. Yu. Popov

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  1. E. Z. Gusakov
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  2. A. Yu. Popov
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Correspondence to A. Yu. Popov.

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Gusakov, E.Z., Popov, A.Y. Stabilization of Low-Threshold Two-Plasmon Parametric Decay Instability with Oblique Microwave Incidence on the Plasma. Tech. Phys. Lett. 49 (Suppl 1), S15–S18 (2023). https://doi.org/10.1134/S106378502390025X

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