Propagation and amplification of microwave radiation in a plasma channel created in gas by a high-power femtosecond UV laser pulse |
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| Authors: | A V Bogatskaya E A Volkova A M Popov I V Smetanin |
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| Institution: | 1.Faculty of Physics,Moscow State University,Moscow,Russia;2.Skobeltsyn Nuclear Physics Research Institute,Moscow State University,Moscow,Russia;3.Lebedev Physical Institute,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | The time evolution of a nonequilibrium plasma channel created in a noble gas by a high-power femtosecond KrF laser pulse is investigated. It is shown that such a channel possesses specific electrodynamic properties and can be used as a waveguide for efficient transportation and amplification of microwave pulses. The propagation of microwave radiation in a plasma waveguide is analyzed by self-consistently solving (i) the Boltzmann kinetic equation for the electron energy distribution function at different spatial points and (ii) the wave equation in the parabolic approximation for a microwave pulse transported along the plasma channel. |
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