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Estimation of the Fulfillment of the Local Thermodynamic Equilibrium Criterion for the Plasma Generated by Laser Pulses of Various Shapes at the Surface of a Solid Target

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Abstract

The results of experimental estimation of the fulfillment of the local thermodynamic equilibrium (LTE) criterion for the plasma generated by laser pulses of various duration at the surface of a solid target placed in a gaseous atmosphere at standard pressure are given in the present paper. The fulfillment of all the LTE criteria is demonstrated for an ensemble of neutral atoms contained in the plasma generated by a giant laser pulse or by a laser pulse whose complex shape represents several giant pulses against the background of free-running laser oscillations. The plasma excited by the radiation of a Nd : YAG laser with energy ≤ 0.4 J per pulse is examined. We have recorded a resonance broadening of atomic Al and Mg lines. This has allowed us to estimate the density of neutral atoms contained in a plasma plume.

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Authors and Affiliations

  1. Institute of Physics and Information Technologies at Far-Eastern State University, Russia

    O. A. Bukin, I. V. Bazarov, A. Yu. Maior, N. S. Bodin, A. A. Il'in, V. I. Tsarev & V. D. Kiselev

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  1. O. A. Bukin
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  2. I. V. Bazarov
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  3. A. Yu. Maior
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  4. N. S. Bodin
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  5. A. A. Il'in
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  6. V. I. Tsarev
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  7. V. D. Kiselev
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Bukin, O.A., Bazarov, I.V., Maior, A.Y. et al. Estimation of the Fulfillment of the Local Thermodynamic Equilibrium Criterion for the Plasma Generated by Laser Pulses of Various Shapes at the Surface of a Solid Target. Russian Physics Journal 44, 472–477 (2001). https://doi.org/10.1023/A:1012325526775

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  • DOI: https://doi.org/10.1023/A:1012325526775

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