Nonlinear heating of underdense collisional plasma by a laser pulse
- Physics Department and Laser Research Institute of Shahid Beheshti University, Evin, Tehran 1983963113 (Iran, Islamic Republic of)
The nonlinear interaction of a laser pulse with a homogenous unmagnetized underdense plasma, taking ohmic heating and the effects of ponderomotive force into account, is theoretically studied. Since the ponderomotive force modifies the electrons density and temperature distribution, the nonlinear dielectric permittivity of plasma is obtained in non-relativistic regime. Furthermore, electric and magnetic fields, electron density, temperature distribution, and the effective permittivity variations are obtained in terms of plasma length by making use the steady state solutions of the Maxwell and hydrodynamic equations. It is shown that the oscillations wave length of electric and magnetic fields decreases when the laser intensity increases. At the same time, in this case, electron density oscillations become highly peaked. Also, the amplitude of the electron temperature oscillations increase and their wavelength decreases.
- OSTI ID:
- 21537830
- Journal Information:
- Physics of Plasmas, Vol. 18, Issue 5; Other Information: DOI: 10.1063/1.3589280; (c) 2011 American Institute of Physics; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COLLISIONAL PLASMA
ELECTRIC FIELDS
ELECTRON DENSITY
ELECTRON TEMPERATURE
LASER-RADIATION HEATING
LASERS
MAGNETIC FIELDS
MAXWELL EQUATIONS
NONLINEAR PROBLEMS
PERMITTIVITY
PLASMA WAVES
PONDEROMOTIVE FORCE
TEMPERATURE DISTRIBUTION
VARIATIONS
DIELECTRIC PROPERTIES
DIFFERENTIAL EQUATIONS
ELECTRICAL PROPERTIES
EQUATIONS
HEATING
PARTIAL DIFFERENTIAL EQUATIONS
PHYSICAL PROPERTIES
PLASMA
PLASMA HEATING