The break-down of metal vapour (Al, Cu) is simulated near the break-down threshold values of laser radiation. The approximation of collision - radiation model are used, including the detail kinetics of excited states with radiation and collision transitions, step-by-step ionization process, unexcitation and recombination. Energy balance is based on two-temperature approximation: for electrons and for heavy particles. It is shown that the particles concentration in excited states and plasma species composition differ rather than Saha - Boltzmann’s distribution. Strong dependence of the break-down threshold intensity on initial temperature of neutral and charged particles is shown.
Kinetics of laser plasma formation in metal vapour
V. I. Mazhukin, I. V. Gusew, I. Smurov, G. Flamant; October 14–18, 2018. "Kinetics of laser plasma formation in metal vapour." Proceedings of the International Congress on Applications of Lasers & Electro-Optics. ICALEO® ‘93: Proceedings of the Applying Lasers in Education Symposium. Orlando, FL, USA. (pp. pp. 213-223). ASME. https://doi.org/10.2351/1.5058575
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