TECHNICAL MECHANICS
ISSN (Print): 1561-9184, ISSN (Online): 2616-6380

English
Russian
Ukrainian
Home > Journal Issues > No 4 (2023) Technical mechanics > 4
___________________________________________________

UDC 533.9

Technical mechanics, 2023, 4, 40 - 49

DETERMINATION OF THE KINETIC PARAMETERS OF A SUPERSONIC PLASMA FLOW OF A GAS-DISCHARGE SOURCE FROM THE CURRENT MEASURED BY AN INSULATED PROBE SYSTEM

DOI: https://doi.org/10.15407/itm2023.04.040

Lazuchenkov D. N., Lazuchenkov N. M.

      ABOUT THE AUTHORS

Lazuchenkov D. N.
Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine

Lazuchenkov N. M.
Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine

      ABSTRACT

      The aim of this work is to develop a procedure for determining the kinetic parameters of charged particles in a supersonic jet of a gas-discharge source of collisionless plasma by measuring the current collected by an insulated probe system of cylindrical electrodes placed transversely to the jet. Based on the authors’ mathematical model of current collection by the above-mentioned probe system and asymptotic solution for the probe current in the electron saturation region, the ion temperature and directed velocity and the electron temperature are related to the measured probe current.
      The effect of the probe system parameters and the current and voltage measurment error on the reliability of diagnostics of a diatomic gas-discharge plasma is studied. Within the framework of the probe current collection model for the electron saturation region, numerical and analytical estimates of the errors in determining the kinetic plasma parameters are obtained as a function of the geometric parameters of the probe system, the accuracy of probe current measurement, and the bias potential of the probe relative to the potential of the reference electrode. The measuring-to-reference electrode area ratio and the probe current measurement conditions optimal for adequate estimation of the average kinetic energy and the directed velocity of ions in a supersonic gas-discharge plasma jet are determined. A priori quantitative characteristics of the effect of the probe measurement errors on the reliability of the determination of the charged particle kinetic parameters are given.
      The reported procedure and estimates of the error in kinetic plasma parameter determination allow one to choose the probe system parameters and estimate the required measurement accuracy when planning and conducting experiments on laboratory plasma diagnostics.
      Pdf (English)







      KEYWORDS

collisionless plasma jet, kinetic energy of charged particles, ion directed velocity, mathematical model of current collection, electron saturation region, parameter determination error estimate

      FULL TEXT:

Pdf (English)









      REFERENCES

1. Gabovich M. D. Physics and Technology of Plasma Ion Sources. Moscow: Atomizdat, 1972. 304 pp. (in Russian).

2. Shuvalov V. A., Pis'mennyi N. I., Lazuchenkov D. N., Kochubey G. S. Probe diagnostics of laboratory and ionospheric rarefied plasma flows. Instruments and Experimental Techniques. 2013. Volume 56. No. 4. Ðp. 459-467. https://doi.org/10.1134/S002044121304009X

3. Chung, P. M., Talbot L., Touryan K. J. Electric Probes in Stationary and Flowing Plasmas. Springer-Verlag, 1975. 150 pp. https://doi.org/10.1007/978-3-642-65886-0

4. Lazuchenkov D. N., Lazuchenkov N. M. Determination of the parameters of a supersonic dissociated rarefied plasma flow by current-voltage characteristics of insulated system of cylindrical probes. Tech. Mech. 2020. No. 2. Pp. 80-88. https://doi.org/10.15407/itm2020.02.080

5. Lazuchenkov D. N. Determination of plasma parameters in a jet of a gas-discharge source using an insulated probe system with cylindrical electrodes. Tech. Mech. 2022. No. 4. Pp. 121-130. https://doi.org/10.15407/itm2022.04.121

6. Lazuchenkov D. N. Determination of the electron temperature in a supersonic jet of a gas-discharge source from current measurements by an insulated probe system. Tech. Mech. 2023. No. 2. Pp. 74-83. https://doi.org/10.15407/itm2023.02.074

7. Lazuchenkov D. N., Lazuchenkov N. M. Calculation of the ion current to a conducting cylinder in a supersonic flow of a collisionless plasma. Tech. Mech. 2022. No. 3. Pp. 91-98. https://doi.org/10.15407/itm2022.03.091

8. Plasma Diagnostics. W. Lochte-Holtgreven (Ed.). New York: AIP Press, 1995. 945 pp.

9. Shuvalov V. A., Gubin V. V. Determination of the degree of nonisothermality of rarefied plasma flows by probe methods. High Temperature Science. 1979. V. 16. No. 4. Pp. 593-596.





Copyright (©) 2023 Lazuchenkov D. N., Lazuchenkov N. M.

Copyright © 2014-2023 Technical mechanics


____________________________________________________________________________________________________________________________
GUIDE
FOR AUTHORS
Guide for Authors ==================== Open Access Policy
Open Access Policy ==================== REGULATIONS
on the ethics of publications
REGULATIONS on the ethics of publications ====================