Resonant absorption and not-so-resonant absorption in short, intense laser irradiated plasma

Journal Article · Mon Jul 15 04:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4813254· OSTI ID:22227980

Ge, Z. Y.; Zhuo, H. B.; Ma, Y. Y.; Yang, X. H.; Yu, T. P.; Zou, D. B.; Yin, Y.; Shao, F. Q. ^[1]; Yu, W.; Luan, S. X. ^[2]; Zhou, C. T. ^[1]; Peng, X. J. ^[3]

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1. College of Science, National University of Defense Technology, Changsha 410073 (China)
2. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 (China)
3. Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)

An analytical model for laser-plasma interaction during the oblique incidence by an ultrashort ultraintense p-polarized laser on a solid-density plasma is proposed. Both the resonant absorption and not-so-resonant absorption are self-consistently included. Different from the previous theoretical works, the physics of resonant absorption is found to be valid in more general conditions as the steepening of the electron density profile is considered. Even for a relativistic intensity laser, resonant absorption can still exist under certain plasma scale length. For shorter plasma scale length or higher laser intensity, the not-so-resonant absorption tends to be dominant, since the electron density is steepened to a critical level by the ponderomotive force. The laser energy absorption rates for both mechanisms are discussed in detail, and the difference and transition between these two mechanisms are presented.

• OSTI ID: 22227980
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 7 Vol. 20; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM-PLASMA SYSTEMS
ELECTRON DENSITY
ENERGY ABSORPTION
IRRADIATION
LASER-PRODUCED PLASMA
PLASMA DENSITY
PLASMA PRODUCTION
PONDEROMOTIVE FORCE
RELATIVISTIC PLASMA
SOLID-STATE PLASMA