激光等离子体的辐射与自吸收现象研究  

The theoretical research on radiation and self absorption of laser induced plasmas

作　　者：强希文[1] 张建泉[1] 刘峰[1] 

机构地区：[1]西北核技术研究所,西安710024

出　　处：《激光杂志》1999年第6期20-23,共4页Laser Journal

摘　　要：脉冲强激光辐照固体靶材时，会迅速地在靶材表面形成一个高温高压的等离子体区域。该等离子体区域在吸收入射激光的同时，会发出很强的紫外以至ｘ 光辐射，它们与靶材有着更强的耦合。本文给出了等离子体中辐射传输的微分方程，并通过对等离子体中辐射和自吸收现象进行讨论，给出了在考虑再辐射效应时，等离子体辐射能流与等离子体参数及激光参数的关系。If a powerful pulsed laser irradiates a solid target,the plasmas that is high temperature and high pressure is formed at a short time.Accompanying with the absorption of laser energy,the plasmas emits a powerful ultraviolet up to x ray radiation,and the re radiation has a more powerful coupling with the target.It gives the differential equation of radiation propagation in the plasmas,discusses the radiation and self absorption in the plasmas in this paper.In the end,it gives the radiation energy flow of plasmas dependence on the parameters of plasmas and laser beams.

关 键 词：激光 等离子体 辐射效应 自吸收 

分 类 号：O53[理学—等离子体物理] TN241[理学—物理]