Self-focusing of electromagnetic pulsed beams in collisional plasmas
- DST Project and Ramanna Fellowship programme, Lucknow University, Department of Education Building, Lucknow 226007 (India)
- Disha Academy of Research and Education, Disha Crown, Katchna Road, Shankar Nagar, Raipur 492007 (India)
In this paper, the self-focusing of an electromagnetic pulsed beam in a collisional plasma has been investigated in the paraxial approximation, following the formalism developed by Akhmanov. The energy balance equation for electrons, the equation expressing the equality of pressure gradient (of electrons and ions) to the force due to space charge field, and the equation for the beam width parameter f (obtained by following Akhmanov's approach) have been simultaneously solved for given initial (z=0) time profile of the pulse to obtain f as a function of {xi} (cz/{omega}r{sub 0}{sup 2}) and t{sup '}=t-z/V{sub g}, where V{sub g} is the group velocity. Both Gaussian and sine time profiles of the pulse have been investigated.
- OSTI ID:
- 21254526
- Journal Information:
- Physics of Plasmas, Vol. 15, Issue 10; Other Information: DOI: 10.1063/1.2991360; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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