PECULARITIES OF PLASMA-CATHODE SURFACE INTERACTION AND ELECTRON-INDUCED EXCITATIONS IN SEMICONDUCTOR GAS DISCHARGE STRUCTURE
E. Koç1, M.M. Shirinov2, B.G. Salamov2,*
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ABSTRACT

The peculiarities of plasma-cathode surface interactions and electron-induced excitations were the focus of an experimental study in Ar plasma. In the present experiments, the GaAs:Cr cathode is utilized, which emits secondary electrons into the discharge during the plasma-cathode surface interaction. The gas discharge gap was set to 143 µm, the discharge diameter to 12 mm, and the pressure to a range of 44-760 Torr. This was done to explore the plasma-cathode surface interactions and electron-induced excitations. It was established that when the GaAs:Cr cathode was exposed to IR light, there was an increase in electron-impact ionization and excitations due to plasma-cathode surface interaction. Concurrently, observations were made about the development of electron-induced excitations in cold Ar microplasma under the conditions of increasing pressure. The results obtained from the plasma-cathode surface interactions and electron-induced excitations become significant for the development of the applications and technologies of cold-discharge plasmas.

Keywords: plasma-cathode surface interactions, discharge plasma, secondary electron emission, discharge emission, electron-induced excitations.
DOI:10.70784/azip.1.2025241

Received: 05.05.2025
Internet publishing: 30.05.2025    AJP Fizika E 2025 02 en p.41-44

AUTHORS & AFFILIATIONS

1. Department of Electrical and Electronics Engineering, Faculty of Engineering, Istanbul Arel University, 34537 Istanbul, Turkey
2. Institute of Physics, Ministry of Science and Education, AZ 1073 Baku, Azerbaijan
E-mail: *Corresponding author: baht1911@gmail.com

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