Determination of the transient electron temperature in a femtosecond-laser-induced air plasma filament.

Phys Rev E Stat Nonlin Soft Matter Phys 2011 Apr 25;83(4 Pt 2):046408. Epub 2011 Apr 25.

University of New Mexico, Department of Physics and Astronomy, Albuquerque, New Mexico 87131, USA.

The transient electron temperature in a weakly ionized femtosecond-laser-produced air plasma filament was determined from optical absorption and diffraction experiments. The electron temperature and plasma density decay on similar time scales of a few hundred picoseconds. Comparison with plasma theory reveals the importance of inelastic collisions that lead to energy transfer to vibrational degrees of freedom of air molecules during the plasma cooling.

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http://dx.doi.org/10.1103/PhysRevE.83.046408DOI Listing
April 2011

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