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Optical emission spectroscopy of a discharge in an argon-nitrogen mixture sustained by terahertz radiation from a free-electron laser
Sidorov A. V.
1, Kubarev V. V.2, Veselov A. P.
1, Vodopyanov A. V.
1, Shevchenko O. A.2, Gorbachev Ya. I.2
1Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia
2 Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2 Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Email: alexsv@ipfran.ru, veselov@ipfran.ru
This paper describes the results of a study of a discharge in an argon-nitrogen mixture created by a focused beam of radiation at a wavelength of 130 μm from the Novosibirsk Free Electron Laser (NovoFEL). The results of a study of the population of nitrogen molecules in a fixed electronic-vibrational state under various discharge conditions are presented. Possible mechanisms for the observed population distribution are discussed. Keywords: terahertz radiation, gas discharge, ultraviolet radiation.
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