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Investigation of a Coaxial Plasma Jet Accelerator

  • ELECTROPHYSICS, ELECTRON AND ION BEAMS, PHYSICS OF ACCELERATORS
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Abstract

We report the results of an investigation of the main energy parameters of a plasma jet from a coaxial accelerator with a conical insert in the charge-formation region. We have obtained the dependences of the pressure and the jet diameter of the deuterium plasma on the distance to the accelerator, as well as on its length and the voltage polarity at the electrodes. It is shown that plasma jet energy is a quadratic function of voltage. Among all tested modifications, an accelerator with a length not exceeding 220 mm, a negative polarity of the voltage at the central electrode, and a focusing conical insert at the beginning of the outer electrode is found to be most effective. At the source output, a deuterium plasma with an ionization front velocity exceeding 100 km/s and a pressure exceeding 1 MPa is obtained. We describe a method for measuring the jet pressure with the help of a deflecting screen and an FLIR SC7300M infrared camera.

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ACKNOWLEDGMENTS

The experimental bench for testing the plasma gun was constructed and maintained by the Ioffe Physical Technical Institute.

Funding

This study was supported by the Ministry of Science and Higher Education of the Russian Federation, project no. 05.585.21.0007 “Perfecting the Basic Technological Systems of the KTM Tokamak, Including the Plasma Control System, Experimental Data Collection and Processing System, Working Gas Preionization System, and Diverter System.”

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Authors and Affiliations

  1. Ioffe Institute, 194021, St. Petersburg, Russia

    A. V. Voronin, V. Yu. Goryainov & V. K. Gusev

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  1. A. V. Voronin
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  2. V. Yu. Goryainov
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  3. V. K. Gusev
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Corresponding author

Correspondence to A. V. Voronin.

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The authors declare that they have no conflicts of interest.

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Translated by N. Wadhwa

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Voronin, A.V., Goryainov, V.Y. & Gusev, V.K. Investigation of a Coaxial Plasma Jet Accelerator. Tech. Phys. 65, 987–993 (2020). https://doi.org/10.1134/S1063784220060286

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  • DOI: https://doi.org/10.1134/S1063784220060286

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