Self-Oscillating Mode of a Probe with Increased Secondary Emission for Nonequilibrium Plasma Diagnostics

Визгалов, И. В.; Gutorov, K. M.; Kurnaev, V.А.; Sorokin, I. A.

doi:10.1134/s1063778819100181

Cited by 4 publications

(1 citation statement)

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“…An alternative way to increase 𝑛 e in BPD plasma is to inject additional free electrons through a process of ion-induced secondary electron emission from the surface of the metal in contact with the plasma (tantalum, tungsten, aluminum, etc.) [10,11]. Described methods result in creation of BPD high-power operation mode with moderate plasma parameters relevant for fusion material testing with ion fluxes up to…”

Section: Introductionmentioning

confidence: 99%

A new compact linear beam-plasma discharge simulator BPD-PSI

2022

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A new BPD-PSI line-type plasma simulator is introduced. The device features two vacuum units: a target unit and an electron gun unit, connected to each other by a water-cooled electron beam transport channel. The Pierce-type electron gun is used to generate stationary or pulsed electron beam, utilized for beam-plasma discharge generation. The plasma electron density can be varied in the range of n e = 1 × 1016 - 1 × 1018 m-3 with electron temperature in the range of T e = 1-20 eV. The ion flux of 1 × 1021 m-2 s-1 and heat fluxes up to 5 MW m-2 are obtained. A set of utilized plasma and plasma-surface interaction diagnostics are described. Five demonstration experiments are presented: 1) high vs low power beam-plasma operation, 2) beam-plasma discharge with/without presence of an external magnetic field, 3) incident ion flux composition analysis, 4) incident ion energy distribution function measurement, 5) in-situ target surface temperature control and in-vacuo thermal desorption spectroscopy measurement. All of the technical features of the setup described in this paper make it a new tool for studying plasma-surface interactions.

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Section: Introductionmentioning

confidence: 99%