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Zhurnal Tekhnicheskoi Fiziki, 2021, Volume 91, Issue 2, Pages 335–341
DOI: https://doi.org/10.21883/JTF.2021.02.50370.153-20
(Mi jtf5088)
 

Electrophysics

Peculiarities of the discharge formation in a plasma accelerator and structure of a jet flowing into vacuum

V. Yu. Goryainova, M. E. Viktorovb, A. V. Vodopyanovb, A. V. Voronina

a Ioffe Institute, St. Petersburg
b Federal Research Center The Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod
Abstract: Results of investigation of jet structure created by coaxial plasma accelerator with conical insert in discharge formation region are presented. An irregular structure of the glowing argon and deuterium jet fraction was detected using a fast electron-optical camera. An irregular structure of the glowing argon and deuterium jet fractions was detected using a fast camera. Oscillations of jet radiation intensity with characteristic frequency 0.3–0.9 MHz were detected. The jet of argon plasma consisted of fragments diverging from the axis of motion, the plasma recombined 20 $\mu$s after the start of current. The deuterium plasma jet was like flakes. The intensity of its radiation significantly decreased by 8 $\mu$s. The characteristic frequencies of irregularities of radiation on jet axis for argon were $\sim$0.09 cm$^{-1}$, for deuterium $\sim$0.3 cm$^{-1}$. Studies of discharge behavior in plasma accelerator demonstrate that diffuse discharge was initiated at the bottom of conical insert. After 0.5 $\mu$s discharge exited to the outer edge of insert, counteracted and burned between central and outer electrodes. Discharge exit from accelerator was observed after 3 $\mu$s and was accompanied by glowing of end of central electrode. In the course of measuring the temperature of side surface of the external electrode using infrared camera, the localization of heating was detected near the edge of conical insert and at accelerator outlet. The research results can be used for gas ionization, in the irradiation of materials, as well as for laboratory simulation of the interaction of plasma flows with a magnetic field in space.
Keywords: coaxial plasma accelerator, fast camera, infrared camera, jet structure, discharge evolution.
Funding agency Grant number
Ministry of Education and Science of the Russian Federation RFMEFI58519X0007
0784-2020-0020
Russian Foundation for Basic Research 18-29-21037
The experimental sample of the coaxial plasma jet accelerator was fabricated and tested under the agreement with the Ministry of Science and Higher Education of the Russian Federation (project identifier RFMEFI58519X0007). This study was supported by the Russian Foundation for Basic Research (project no. 18-29-21037), the Ministry of Science and Higher Education of the Russian Federation under the State assignment in science (project no. 0784-2020-0020).
Received: 30.04.2020
Revised: 08.07.2020
Accepted: 24.07.2020
English version:
Technical Physics, 2021, Volume 66, Issue 2, Pages 325–332
DOI: https://doi.org/10.1134/S1063784221020134
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: V. Yu. Goryainov, M. E. Viktorov, A. V. Vodopyanov, A. V. Voronin, “Peculiarities of the discharge formation in a plasma accelerator and structure of a jet flowing into vacuum”, Zhurnal Tekhnicheskoi Fiziki, 91:2 (2021), 335–341; Tech. Phys., 66:2 (2021), 325–332
Citation in format AMSBIB
\Bibitem{GorVikVod21}
\by V.~Yu.~Goryainov, M.~E.~Viktorov, A.~V.~Vodopyanov, A.~V.~Voronin
\paper Peculiarities of the discharge formation in a plasma accelerator and structure of a jet flowing into vacuum
\jour Zhurnal Tekhnicheskoi Fiziki
\yr 2021
\vol 91
\issue 2
\pages 335--341
\mathnet{http://mi.mathnet.ru/jtf5088}
\crossref{https://doi.org/10.21883/JTF.2021.02.50370.153-20}
\elib{https://elibrary.ru/item.asp?id=44885101}
\transl
\jour Tech. Phys.
\yr 2021
\vol 66
\issue 2
\pages 325--332
\crossref{https://doi.org/10.1134/S1063784221020134}
\scopus{https://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-85102076175}
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