Guiding of Long-Distance Electric Discharges by Combined Femtosecond and Nanosecond Pulses Emitted by Hybrid KrF Laser System.

摘要

The results obtained within the framework of the present project can be tentatively grouped as follows. The first part (Sections 2, 3) of the present project is devoted to a detailed description of the schemes for subpicosecond USP amplification in a chain of large-aperture KrF amplifiers with electron-beam pumping, as well as lasing dynamics of combined (amplitude-modulated) high-energy 100-ns long UV laser pulses in the regime of regenerative amplification of a USP train. Experimental and theoretical studies of filamentation of the USP UV and IR laser beams in atmospheric air, of the processes of air ionization, electron loss and revival in the laser-produced air plasma are described in the second part (Sections 4-6). The third part (Sections 7, 8) demonstrates the advantages of amplitude-modulated pulses in the production of extended plasma channels in the atmosphere and laser guiding of high-voltage electric discharges.