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Author Liu, H. C. ♦ Mao, X. L. ♦ Yoo, J. H. ♦ Russo, R. E.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION ♦ BREMSSTRAHLUNG ♦ PLASMA ♦ ABLATION ♦ LASER RADIATION ♦ SILICON ♦ ELECTRON DENSITY ♦ ELECTRON TEMPERATURE ♦ CRITICAL TEMPERATURE
Abstract A dramatic change in plasma characteristics, as well as a significant increase in the quantity of ablated mass were observed at a laser power density threshold of 20 GW/cm{sup 2}. The electron number density and temperature of the laser-induced plasma show dramatic changes in their nonlinear behavior in the range of 2{endash}80 GW/cm{sup 2}. The crater volume undergoes some type of phase explosion at the threshold. Mechanisms such as inverse bremsstrahlung and self-regulation were used to describe the behavior below threshold. Self-focusing and critical temperature are discussed to explain the dramatic changes at the threshold. {copyright} {ital 1999 American Institute of Physics.}
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 1999-08-01
Publisher Place United States
Journal Applied Physics Letters
Volume Number 75
Issue Number 9


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