Tracing Air-Breakdown Plasma Characteristics from Single-Color Filament Terahertz Spectra
| Autor: | Nikolay Panov, Daniil E. Shipilo, Andrey A. Ionin, A. A. Ushakov, S. A. Savinov, Andrei B Savel'ev, Alexander P. Shkurinov, Olga G. Kosareva, A. V. Koribut, Daria V. Mokrousova, G. E. Rizaev, Leonid V. Seleznev, Yu. A. Mityagin, I. A. Nikolaeva |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Radiation Materials science business.industry Terahertz radiation Bolometer Physics::Optics Plasma Condensed Matter Physics 01 natural sciences Spectral line law.invention 010309 optics Protein filament Interferometry Optics law 0103 physical sciences Spectral width Optical radiation Electrical and Electronic Engineering business Instrumentation |
| Zdroj: | Journal of Infrared, Millimeter, and Terahertz Waves. 41:1105-1113 |
| ISSN: | 1866-6906 1866-6892 |
| DOI: | 10.1007/s10762-020-00688-0 |
| Popis: | In this paper, we measure broadband terahertz spectra from a single 744-nm filament produced in tight, medium, and loose geometrical focusing conditions. Terahertz spectra are measured using interferometer coupled to a helium-cooled bolometer avoiding any cutoff frequencies. Based on THz spectrum maximum position and spectral width, we estimate electron-heavy particle (neutrals and ions) collision rate. Numerical simulations are performed using the state-of-the-art model of unidirectional femtosecond pulse propagation and convergence/divergence of optical radiation at large angles. |
| Databáze: | OpenAIRE |
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