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Title: Self-focusing of Gaussian laser beam in weakly relativistic and ponderomotive regime using upward ramp of plasma density

We have studied the steady state self-focusing of Gaussian laser beam in weakly relativistic and ponderomotive regime for upward increasing plasma ramp density profile. We have obtained the differential equation for beam width parameter by using parabolic equation approach under the usual Wentzel–Kramers–Brillouin and paraxial approximations. The variation of beam width parameter with respect to dimensionless distance of propagation is presented graphically by varying the parameters of density profile, intensity parameter, and electronic temperature. It shows that the above stated parameters play an important role in propagation characteristics and give reasonably interesting results.
Authors:
 [1] ;  [2]
  1. Department of Physics, Devchand College, Arjunnagar, Kolhapur 591 269 (India)
  2. Department of Physics, Doodhsakhar Mahavidyalaya, Bidri, Kolhapur 416 208 (India)
Publication Date:
OSTI Identifier:
22220659
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 8; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; APPROXIMATIONS; BEAM PROFILES; BEAMS; DIFFERENTIAL EQUATIONS; DISTANCE; FOCUSING; LASERS; LIGHT TRANSMISSION; PLASMA DENSITY; PONDEROMOTIVE FORCE; RELATIVISTIC PLASMA; RELATIVISTIC RANGE; VARIATIONS