An experimental setup and a technique for measuring the temperature and concentration of carbon and barium oxide particles in an ionized dispersed medium are described. It is shown that in a wide-aperture Nd laser beam at a wavelength of 1.06 μm with a pulse duration of ~1 ms, the ionization threshold of a carbon dispersed medium is lower than the ionization threshold of a focused beam. The ionization threshold is 5−10 times higher for the medium with barium oxide particles (with a low ionization potential) than for the medium with carbon particles for both focused and wide-aperture beams. It has been experimentally confirmed that exothermic reactions prevail over other processes during ionization of the examined media.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 4, pp. 88–92, April, 2022.
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Balandin, S.F., Donchenko, V.A., Myshkin, V.F. et al. Ionization Processes in a Carbon Aerosol Upon Exposure to Long Laser Pulses. II. Russ Phys J 65, 683–687 (2022). https://doi.org/10.1007/s11182-022-02685-3
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DOI: https://doi.org/10.1007/s11182-022-02685-3