Propagation and amplification of short radio-frequency pulses in a plasma channel created in gaseous media by the intense laser radiation

23rd International Laser Physics Workshop

Bogatskaya, A.V.^1,2,3 ; Popov, A.M.^1,2,3 ; Smetanin, I.V.^3 ; Volkova, E.A.^1

D.V. Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, Russia^1

Department of Physics, Moscow State University, Moscow, Russia^2

P.N. Lebedev Physical Institute, RAS, Moscow, Russia^3

关键词: Electron energy distribution functions;    Gaseous media;    Intense laser radiation;    Nonequilibrium plasmas;    Plasma channel;    Radio frequency pulse;    Self-consistent solution;    Spatial points;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/594/1/012017/pdf
DOI  :  10.1088/1742-6596/594/1/012017

来源: IOP

【 摘 要 】

The evolution of the electron energy distribution function (EEDF) in nonequilibrium plasma channel created in xenon by powerful KrF-femtosecond laser pulse is studied. It is demonstrated that such a plasma channel can be used as a waveguide for both transportation and amplification of the microwave radiation. The specific features of such a plasma waveguide are studied on the basis of the self-consistent solution of the kinetic Boltzmann equation for the EEDF in different spatial points of the gas media and the wave equation in slow-varying amplitude approximation for the microwave radiation guided and amplified in the channel.