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On focusing of a ring ripple on a Gaussian electromagnetic beam in a plasma
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10.1063/1.2979325
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Affiliations:
1 Ramanna Fellowship Program, Department of Education Building, Lucknow University, Lucknow-226007, India
a) Author to whom correspondence should be addressed. Electronic mail: msodha@rediffmail.com.
Phys. Plasmas 15, 092307 (2008)
/content/aip/journal/pop/15/9/10.1063/1.2979325
http://aip.metastore.ingenta.com/content/aip/journal/pop/15/9/10.1063/1.2979325
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## Figures

FIG. 1.

(a)–(e) Critical curves for the ring ripple [the dependence of the initial beam width of the ring ripple on ], corresponding to ponderomotive nonlinearity, around the standard set of the parameters , , , , , and ; the figures from (a) to (e) refer to the effect on the critical width by varying the parameters , , , , and (or ), respectively, keeping the rest of the constants the same (the magnitude of the varying parameter is indicated above the curve). (f) Critical curves for the ring ripple: The dependence of the initial beam width of the ring ripple on for the propagation of the ring ripple in a plasma with dominant ponderomotive and collisional nonlinearities, for the parameters , , , , and ; the curves and refer to ponderomotive and collisional nonlinearity, respectively, while subscripts and refer to , 5, respectively. Further, the superscripts “I” and “III” correspond to and , respectively.

FIG. 2.

(a) Variation of the dimensionless beam width parameter on the dimensionless distance of propagation in a collisionless plasma with dominant ponderomotive nonlinearity for the parameters , , , , , and ; the curves refer to an arbitrarily chosen set as indicated over the curves. (b) Variation of the dimensionless phase associated with the eikonal on the dimensionless distance of propagation , in a collisionless plasma with dominant ponderomotive nonlinearity, for the parameters , , , , , , and ; the curves a, b, and c refer to , 20, and 50, respectively.

/content/aip/journal/pop/15/9/10.1063/1.2979325
2008-09-17
2014-04-17

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