Threshold Field That Separates Domains of Subcritical and Deeply Subcritical Microwave Discharges Ignited on a Dielectric Surface
- Authors: Bulat P.V.1, Grachev L.P.2, Esakov I.I.2, Ravaev A.A.2
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Affiliations:
- ITMO University
- Moscow Radio Technical Institute, Russian Academy of Sciences
- Issue: Vol 64, No 1 (2019)
- Pages: 56-60
- Section: Plasma
- URL: https://journals.rcsi.science/1063-7842/article/view/202649
- DOI: https://doi.org/10.1134/S1063784219010067
- ID: 202649
Cite item
Abstract
Microwave discharges initiated by an electromagnetic (EM) vibrator and ignited on the inner surface of a dielectric tube in a quasi-optical EM beam are experimentally studied. A threshold level of the microwave field that separates domains of subcritical and deeply subcritical microwave discharges is determined in experiments. Experiments show that streamer channels of the subcritical discharge propagate from the initiator along the propagation direction of the EM wave and in the opposite direction under certain conditions. Variations in the power of the microwave beam can be used to change length of the plasma region of the subcritical discharge along the wave vector of the microwave beam and control the level of the EM energy absorbed in the plasma regions of the deeply subcritical microwave discharge.
About the authors
P. V. Bulat
ITMO University
Email: grachev@mrtiran.ru
Russian Federation, St. Petersburg, 197101
L. P. Grachev
Moscow Radio Technical Institute, Russian Academy of Sciences
Author for correspondence.
Email: grachev@mrtiran.ru
Russian Federation, Moscow, 117519
I. I. Esakov
Moscow Radio Technical Institute, Russian Academy of Sciences
Email: grachev@mrtiran.ru
Russian Federation, Moscow, 117519
A. A. Ravaev
Moscow Radio Technical Institute, Russian Academy of Sciences
Email: grachev@mrtiran.ru
Russian Federation, Moscow, 117519