Experimental Study of Inhomogeneous Reflex-Discharge Plasma Using Microwave Refraction Interferometry

  • Yu. V. Kovtun National Science Center Kharkiv Institute of Physics and Technology
  • Y. V. Siusko National Science Center Kharkiv Institute of Physics and Technology
  • E. I. Skibenko National Science Center Kharkiv Institute of Physics and Technology
  • A. I. Skibenko National Science Center Kharkiv Institute of Physics and Technology
Keywords: plasma, plasma diagnostics, interferometry, refraction, microwave beams

Abstract

The phase shift at the plasma interferometry with oblique microwaves and microwaves passing through the center of a plasma formation has been calculated. The critical density Ncr and the critical radius rcr of a plasma layer, at which microwaves do not hit the horn antenna, are calculated for various radial plasma distribution functions. The time dependences of the phase shift for the transverse and oblique probing modes are experimentally measured. Using the phase shifts determined by the both methods, the time dependence of the product NpL of the electron concentration in plasma and the optical path length of a microwave beam in vacuum is found, and the average plasma density is estimated.

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Published
2018-12-09
How to Cite
Kovtun, Y., Siusko, Y., Skibenko, E., & Skibenko, A. (2018). Experimental Study of Inhomogeneous Reflex-Discharge Plasma Using Microwave Refraction Interferometry. Ukrainian Journal of Physics, 63(12), 1057. https://doi.org/10.15407/ujpe63.12.1057
Section
Plasma physics