Microwave diagnostics of femtosecond laser-generated plasma filaments

Journal Article · Mon Oct 03 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3643478· OSTI ID:22027761

Papeer, J; Ehrlich, Y; Zigler, A ^[1]; Mitchell, C; Penano, J; Sprangle, P ^[2]

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1. Racah Institute of Physics, Hebrew University, Jerusalem, 91904 (Israel)
2. Plasma Division, Naval Research Lab, Washington, DC, 20375 (United States)

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 x 10{sup 16 }cm{sup -3} and decay time of 3 ns are obtained.

• OSTI ID: 22027761
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 14 Vol. 99; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COMPUTERIZED SIMULATION
ELECTRIC CONDUCTIVITY
ELECTRON DENSITY
KERR EFFECT
LASER-PRODUCED PLASMA
LASERS
MICROWAVE RADIATION
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA FILAMENT
SPATIAL RESOLUTION
WAVEGUIDES