Abstract
The possibility of modifying the scheme of the previously developed three-channel polarization interferometer and creating a device that allows laser probing of plasma with a femtosecond time resolution is demonstrated. The test experiments with a spark in air generated by a nanosecond laser pulse using a probing pulse with duration of 50 fs are carried out. High-contrast interference plasma images making it possible to reconstruct the profile of an electron plasma concentration in a wide range of changes in the delay of the probing pulse with respect to the forming pulse are obtained.
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Funding
This work was supported in part by the Russian Foundation for Basic Research, project no.16-02-00302-a.
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The authors declare that they have no conflicts of interest.
Russian Text © The Author(s), 2019, published in Yadernaya Fizika i Inzhiniring, 2019, Vol. 10, No. 1.
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Bolkhovitinov, E.A., Gospodinov, G.A., Ivanov, K.A. et al. The Diagnostic Probing of Laser Plasma with a Femtosecond Time Resolution Using a Three-Channel Polarization Interferometer. Phys. Atom. Nuclei 82, 1419–1423 (2019). https://doi.org/10.1134/S1063778819100077
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DOI: https://doi.org/10.1134/S1063778819100077