Nonequilibrium evolution of strong-field anisotropic ionized electrons towards a delayed plasma-state.

Authors:
Dr. Agnieszka Jaron-Becker, PhD
Dr. Agnieszka Jaron-Becker, PhD
University of Colorado at Boulder
Associate Research Professor
Boulder, CO | United States

Opt Express 2012 Jan;20(3):2310-8

Arizona Center for Mathematical Sciences, Department of Mathematics, University of Arizona, Tucson, Arizona 85721, USA.

Rigorous quantum calculations of the femtosecond ionization of hydrogen atoms in air lead to highly anisotropic electron and ion angular (momentum) distributions. A quantum Monte-Carlo analysis of the subsequent many-body dynamics reveals two distinct relaxation steps, first to a nearly isotropic hot nonequilibrium and then to a quasi-equilibrium configuration. The collective isotropic plasma state is reached on a picosecond timescale well after the ultrashort ionizing pulse has passed.

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http://dx.doi.org/10.1364/OE.20.002310DOI Listing
January 2012
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