Short-time-scale self-focusing of electromagnetic beams in a magnetoplasma
A Gaussian electromagnetic beam propagating in a plasma in the direction of the static magnetic field gives rise to (i) a ponderomotive force transverse to the magnetic field and (ii) nonuniform heating of electrons. These effects eventually modify the local magnetic field and thus produce a nonline...
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| Veröffentlicht in: | J. Appl. Phys.; (United States) 1979-02, Vol.50 (2), p.751-752 |
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| container_title | J. Appl. Phys.; (United States) |
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| creator | Tewari, D. P. Sharma, R. R. |
| description | A Gaussian electromagnetic beam propagating in a plasma in the direction of the static magnetic field gives rise to (i) a ponderomotive force transverse to the magnetic field and (ii) nonuniform heating of electrons. These effects eventually modify the local magnetic field and thus produce a nonlinearity relevant to self-focusing. The critical power for self-focusing on a time scale shorter than the diffusion time (τD≳t) is vth/c times shorter than that on the longer time scale (t≳τD), where vth is the thermal speed of electrons. |
| doi_str_mv | 10.1063/1.326039 |
| format | Article |
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| identifier | ISSN: 0021-8979 |
| ispartof | J. Appl. Phys.; (United States), 1979-02, Vol.50 (2), p.751-752 |
| issn | 0021-8979 1089-7550 |
| language | eng |
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| source | AIP Digital Archive |
| subjects | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY 700108 - Fusion Energy- Plasma Research- Wave Phenomena BEAM-PLASMA SYSTEMS ELECTROMAGNETIC RADIATION ELECTRON DENSITY FOCUSING HEATING MAGNETIC FIELDS RADIATIONS WAVE PROPAGATION |
| title | Short-time-scale self-focusing of electromagnetic beams in a magnetoplasma |
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