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Laser beam self-focusing in collisional plasma with periodical density ripple
摘要： In the paper, we applied the paraxial region theory and Wentzel–-Kramers–-Brillouin approximation to study laser beam self-focusing in the interaction of laser and collisional plasma with periodical density ripple. The results have shown that, under the influence of collision nonlinear effect, laser presents stable self-focusing, self-defocusing, and oscillational self-focusing in the plasma. Besides, the parameters of plasma with periodical density ripple have a greater impact on the effect of self-defocusing and oscillational self-focusing than stable self-focusing. In certain conditions, beam self-defocusing and oscillational self-focusing would decline and even disappear, and stable self-focusing would further be strengthened. Hence, selecting a suitable periodic plasma system is advantageous for separating self-defocusing and oscillational self-focusing, and for the formation of a more stable collisional self-focusing.
关键词： self-focusing,dielectric function,Collisional plasma,periodical density ripple,electron temperature
更新于2025-09-19 17:13:59
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Propagation of circularly polarized laser in strongly magnetized over-dense collisional plasma
摘要： Permittivity of a circularly polarized (CP) laser in magnetized collisional plasma is obtained in simpli?ed form. The propagation of a CP laser in magnetized homogeneous over-dense collisional plasma was investigated, and characteristics such as attenuation length, speci?c energy deposition and blue shift are obtained. Potential applications in ?elds such as inertial con?ned fusion are discussed.
关键词： energy deposition,collisional plasma,permittivity,inertial con?ned fusion,attenuation length,blue shift,circularly polarized laser,magnetized plasma
更新于2025-09-16 10:30:52