Experiments on creation and maintenance of plasma in focused gyrotron radiation beam with frequency 1 THz
Veselov A. P.1, Vodopyanov A. V.1,2, Kalynov Yu. K.1, Sidorov A. V.1,2
1Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia
2Lobachevsky University of Nizhny Novgorod, Nizhny Novgorod, Russia
Email: veselov@ipfran.ru, avod@ipfran.ru, kalynov@ipfran.ru, alexsv@ipfran.ru
The first results of the study of the conditions of discharge generation in a focused beam of electromagnetic radiation of a gyrotron with a frequency of 1 THz are presented. The pressure breakdown limits of the working gas (argon) were determined (0.15-1.75 bar). The experimental results obtained correlate well with the calculations carried out earlier. The spatial dynamics of the discharge was investigated, and the propagation velocity of the discharge front as a function of gas pressure was measured. Assumptions are made about the mechanism of discharge propagation. Keywords: terahertz radiation, gas discharge, discharge propagation.
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