This article is cited in 9 papers

Interaction of laser radiation with matter

Postionisation of a spatially nonuniform plasma plume under high-intensity femtosecond laser irradiation

D. A. Krestovskikh^ab, K. A. Ivanov^cab, I. N. Tsymbalov^ab, S. A. Shulyapov^ab, V. V. Bukin^d, R. V. Volkov^ab, A. A. Rupasov^c, A. B. Savel'ev<sup>ab

a</sup> Faculty of Physics, Lomonosov Moscow State University
^b International Laser Center of Moscow State University
^c P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow
^d A.M. Prokhorov General Physics Institute Russian Academy of Sciences, Moscow

Abstract: The plasma plume formed by a high-power nanosecond laser pulse on the surface of solid targets as well as the plume parameters after its irradiation by a high-intensity femtosecond laser pulse are investigated by optical diagnostic techniques. Twodimensional patterns of the electron plasma density are reconstructed from experimentally recorded interferograms at different stages of plasma evolution. It is shown that the interaction of the high-intensity femtosecond radiation with the plasma cloud is accompanied by the field ionisation of atoms and ions as well as by a significant increase in the electron density throughout the interaction volume.

Keywords: laser-produced plasma, high-power laser pulses, interferometry, electron density, ionisation.

Received: 05.12.2016

 English version: Quantum Electronics, 2017, 47:1, 42–47

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