Velocity-dependent collision frequency effects in nonlinear spectroscopy of plasma

A. I. Chernykh; E. V. Podivilov; D. A. Shapiro

doi:10.1117/12.328288

21 October 1998 Velocity-dependent collision frequency effects in nonlinear spectroscopy of plasma

A. I. Chernykh, E. V. Podivilov, D. A. Shapiro

Proceedings Volume 3485, 11th International Vavilov Conference on Nonlinear Optics; (1998) https://doi.org/10.1117/12.328288
Event: Eleventh International Vavilov Conference on Nonlinear Optics, 1997, Novosibirsk, Russian Federation

Abstract

We investigate the line narrowing in dense plasmas due to ion- ion scattering. Landau term include velocity dependence of the effective transport collision frequency that makes the problem more complicated that the Dicke narrowing in gases. The collision process is analytically described as a diffusion in the velocity space. It is shown that the atomic density matrix can be calculated by decomposition over orthogonal polynomials. The analytical results are obtained in limiting cases of short and long wavelength compared with the mean free path of an ion. For intermediate case a simple interpolation formula, based on numerical calculation, is proposed having an accuracy within 10% both for absorption linewidth and anomalous refractive index. The conditions for experimental observation of the narrowing are discussed.

Citation Download Citation

A. I. Chernykh, E. V. Podivilov, and D. A. Shapiro "Velocity-dependent collision frequency effects in nonlinear spectroscopy of plasma", Proc. SPIE 3485, 11th International Vavilov Conference on Nonlinear Optics, (21 October 1998); https://doi.org/10.1117/12.328288

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