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Brief Communications

Influence of plasma motion on propagation of supersonic radiation waves

I. V. Nemtchinov, M. P. Popova, L. P. Shubadeeva


Abstract: It is shown that in the case of a small-diameter plasma column formed in a gas by a laser pulse, the plasma expansion in the lateral direction reduces the density and the absorption in the central part of the column. Absorption waves are generated as a result of this effect and as a result of emission of radiation by the plasma itself; these waves travel not only antiparallel (opposite) to the laser beam but also parallel to the beam. Numerical solutions of a two-dimensional transient radiation–gasdynamic problem yielded the parameters and made it possible to study the evolution of a plasma under these conditions.

UDC: 533.95

PACS: 52.50.Jm, 52.35.Hr, 52.25.Ps

Received: 02.06.1981

 English version: Soviet Journal of Quantum Electronics, 1982, 12:2, 258–260

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