Nonlinear resonance absorption of laser in an inhomogeneous plasma

Journal Article · Thu Aug 15 00:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4818588· OSTI ID:22220669

Rajouria, Satish Kumar; K K, Magesh Kumar; Tripathi, V. K. ^[1]

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1. Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016 (India)

A formalism of nonlinear resonance absorption of p-polarized laser in a plasma with density gradient is developed. The nonlinearity is taken to arise through the relativistic mass effect. As the laser incident at an angle to the density gradient approaches the turning point, dielectric swelling leads to field enhancement, causing strong electron mass enhancement and reduction in local plasma frequency. When the critical layer is within a laser wavelength away from the turning point, the laser field is greatly enhanced at the critical layer and absorption of the laser is strongly affected by the nonlinear effect.

• OSTI ID: 22220669
• Journal Information: Physics of Plasmas, Vol. 20, Issue 8; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
INHOMOGENEOUS PLASMA
LANGMUIR FREQUENCY
LASER RADIATION
LASERS
LAYERS
LIGHT TRANSMISSION
MASS
NONLINEAR PROBLEMS
RELATIVISTIC PLASMA
RELATIVISTIC RANGE
RESONANCE ABSORPTION