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17 November 2020 Laser interferometry of terahertz discharge in N2
T. Barmashova, A. Luchinin, A. Murzanev, A. Sidorov, A. Stepanov, A. Veselov, A. Vodopyanov
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Proceedings Volume 11582, Fourth International Conference on Terahertz and Microwave Radiation: Generation, Detection, and Applications; 115820N (2020) https://doi.org/10.1117/12.2580141
Event: Fourth International Conference on Terahertz and Microwave Radiation: Generation, Detection, and Applications, 2020, Tomsk, Russian Federation
Abstract
The spatial-time dynamic of THz nitrogen discharge in the background pressure range from a few torrs to one atmosphere was obtained. The work discuss issues of discharge propagation mechanism and shock wave formation. The radiation source was the gyrotron with maximum pulse power of about 40kW at frequency 0:67THz and duration 20μs. The main diagnostic tool was laser interferometry, based on the analysis of changes in the fringe structures made by a probe beam (r = 12mm at 1=e2 level) crossing the plasma cloud. The Michelson interferometer scheme with a diode laser at 532nm was used.
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T. Barmashova, A. Luchinin, A. Murzanev, A. Sidorov, A. Stepanov, A. Veselov, and A. Vodopyanov "Laser interferometry of terahertz discharge in N2", Proc. SPIE 11582, Fourth International Conference on Terahertz and Microwave Radiation: Generation, Detection, and Applications, 115820N (17 November 2020); https://doi.org/10.1117/12.2580141
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KEYWORDS
Plasma
Terahertz radiation
Nitrogen
Radio propagation
Laser interferometry
Microwave radiation
Phase shifts
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