Diagnostics of Hot Electron Component Escaping from Dense Nonequilibrium Plasma of Continuous ECR Discharge

E. M. Kiseleva; Киселёва Е. М.; M. E. Viktorov; Викторов М. Е.; V. A. Skalyga; Скалыга В. А.; I. V. Izotov; Изотов И. В.; S. S. Vybin; Выбин С. С.; A. V. Polyakov; Поляков А. В.; A. F. Bokhanov; Боханов А. Ф.

doi:10.31857/S0367292122601266

Diagnostics of Hot Electron Component Escaping from Dense Nonequilibrium Plasma of Continuous ECR Discharge

Authors: Kiseleva E.M.¹^,2, Viktorov M.E.¹^,2, Skalyga V.A.¹^,2, Izotov I.V.¹^,2, Vybin S.S.¹^,2, Polyakov A.V.¹^,2, Bokhanov A.F.¹
Affiliations:
1. Institute of Applied Physics, Russian Academy of Sciences
2. Lobachevsky State University of Nizhny Novgorod
Issue: Vol 49, No 4 (2023)
Pages: 354-358
Section: PLASMA DIAGNOSTICS
URL: https://ruspoj.com/0367-2921/article/view/668566
DOI: https://doi.org/10.31857/S0367292122601266
EDN: https://elibrary.ru/FKKUTC
ID: 668566

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Abstract

The energy distribution of hot electrons escaping from the plasma of the ion source based on the discharge ignited under conditions of electron cyclotron resonance (ECR) was studied experimentally. The measurements were performed in wide ranges of microwave heating powers and neutral gas pressures. The facility under study is capable of providing uniquely high unit energy input into the plasma confined in the quasi-gas-dynamic (collisional) regime. In the course of the experiments, the diagnostics was performed of microwave radiation generated by the hot fraction of electrons escaping from the plasma. The regimes were discovered, in which the conditions are satisfied for the development of kinetic instabilities in the ECR discharge plasma. The energies are determined of electrons that cause the development of instabilities of this type, which are characterized by bursts of microwave radiation.

Keywords

microwave radiation, electron cyclotron resonance (ECR), ECR ion sources, electron energy distribution function, plasma diagnostics, kinetic instabilities

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