Spatiotemporal dynamics of Gaussian laser pulse in a multi ions plasma

Journal Article · Mon Aug 15 00:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4960677· OSTI ID:22599947

Jafari Milani, M. R., E-mail: [e-mail] ^[1]

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1. Plasma Physics Research School, NSTRI, Tehran (Iran, Islamic Republic of)

Spatiotemporal evolutions of Gaussian laser pulse propagating through a plasma with multiple charged ions are studied, taking into account the ponderomotive nonlinearity. Coupled differential equations for beam width and pulse length parameters are established and numerically solved using paraxial ray approximation. In one-dimensional geometry, effects of laser and plasma parameters such as laser intensity, plasma density, and temperature on the longitudinal pulse compression and the laser intensity distribution are analyzed for plasmas with singly and doubly charged ions. The results demonstrate that self-compression occurs in a laser intensity range with a turning point intensity in which the self-compression process has its strongest extent. The results also show that the multiply ionized ions have different effect on the pulse compression above and below turning point intensity. Finally, three-dimensional geometry is used to analyze the simultaneous evolution of both self-focusing and self-compression of Gaussian laser pulse in such plasmas.

• OSTI ID: 22599947
• Journal Information: Physics of Plasmas, Vol. 23, Issue 8; Other Information: (c) 2016 Author(s); 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
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
APPROXIMATIONS
BEAM PROFILES
BEAMS
COMPRESSION
DIFFERENTIAL EQUATIONS
FOCUSING
GAUSSIAN PROCESSES
GEOMETRY
ION PLASMA WAVES
IONS
LASERS
LENGTH
NONLINEAR PROBLEMS
ONE-DIMENSIONAL CALCULATIONS
PLASMA DENSITY
PONDEROMOTIVE FORCE
PULSES
TEMPERATURE DEPENDENCE
THREE-DIMENSIONAL CALCULATIONS