论文信息 - Microwave diagnostics of femtosecond laser-generated plasma filaments

Microwave diagnostics of femtosecond laser-generated plasma filaments

We present a simple non-intrusive experimental method allowing a complete single shot temporal measurement of laser produced plasma filament conductivity. The method is based on filament interaction with low intensity microwave radiation in a rectangular waveguide. The suggested diagnostics allow a complete single shot temporal analysis of filament plasma decay with resolution better than 0.3 ns and high spatial resolution along the filament. The experimental results are compared to numerical simulations, and an initial electron density of 7 × 1016 cm−3 and decay time of 3 ns are obtained.

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