激光束与亚临界密度等离子体相互作用产生的加热波折射通道

IF 2 3区 物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS
S. Yu. Gus'kov, P. A. Kuchugov, N. N. Demchenko
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引用次数: 0

摘要

在激光束半径有限的情况下,研究了激光驱动加热波在密度小于临界密度的等离子体中传播的现象。在计算和理论研究的基础上,发现了由于激光辐射对等离子体运动形成的密度梯度的反射,等离子体中心轴向区域的加热波传播在调谐点处的通道效应。与自聚焦现象不同的是,在自聚焦现象中,激光通量是在没有射线交汇的情况下集中的,而在折射渠化现象中,这种现象是由于射线交汇而产生的。这与多光束照射激光目标时产生的高通量密度类似。研究表明,与位于激光束半径附近的外围等离子体区域的加热波纵向速度相比,通道区域的加热波纵向速度要大得多。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Refractive channeling of heating wave driven by laser beam interaction with plasma of subcritical density
The phenomenon of laser-driven heating wave propagation in a plasma with a density less than the critical density is considered for the case of a finite radius of the laser beam. Based on computational and theoretical studies, the effect of channeling the heating wave propagation in the central axial region of plasma due to the reflection of laser radiation on density gradient, formed by plasma motion, at the tuning point was found. Unlike the self-focusing phenomenon, where the laser flux is concentrated without ray intersection, in refractive channeling, this occurs due to ray intersection. This is similar to the creation of a high flux density during multi-beam irradiation of the laser target. It is shown that the longitudinal velocity of heating wave in the channeling region is significantly larger compared with that in the peripheral plasma regions located at a distance of about laser beam radius.
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来源期刊
Physics of Plasmas
Physics of Plasmas 物理-物理:流体与等离子体
CiteScore
4.10
自引率
22.70%
发文量
653
审稿时长
2.5 months
期刊介绍: Physics of Plasmas (PoP), published by AIP Publishing in cooperation with the APS Division of Plasma Physics, is committed to the publication of original research in all areas of experimental and theoretical plasma physics. PoP publishes comprehensive and in-depth review manuscripts covering important areas of study and Special Topics highlighting new and cutting-edge developments in plasma physics. Every year a special issue publishes the invited and review papers from the most recent meeting of the APS Division of Plasma Physics. PoP covers a broad range of important research in this dynamic field, including: -Basic plasma phenomena, waves, instabilities -Nonlinear phenomena, turbulence, transport -Magnetically confined plasmas, heating, confinement -Inertially confined plasmas, high-energy density plasma science, warm dense matter -Ionospheric, solar-system, and astrophysical plasmas -Lasers, particle beams, accelerators, radiation generation -Radiation emission, absorption, and transport -Low-temperature plasmas, plasma applications, plasma sources, sheaths -Dusty plasmas
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