%0 Journal Article
%T Time-resolved spectrum characteristics of instantaneous plasma generation and evolution processes in nanosecond laser-Cu-target<br>脉冲激光-铜靶等离子体产生及其演化过程的瞬态光谱研究
%A Liu Yuan-Xing
%A Liu Shi-Bing
%A Song Hai-Ying
%A He Run
%A <br>刘院省
%A 刘世炳
%A 宋海英
%A 何润
%J 物理学报
%D 2012
%I 
%X The physical processes in the generation and the evolution of copper plasma induced by a high power nanosecond laser pulse are investigated with time-resolved spectrum. In the solid-gas-liquid phase transition, the intensity of reflected beam evolving with time markedly reveals the absorption of laser energy in the laser-copper interacting zone. So the phase transitions on the surface of copper target result in the fact that intensity of reflected beam evolving with time obviously presents a double-peak structure. Meanwhile, the appearance times of the plasma-gas-liquid phase transition on the target surface is advanced with the increase of peak-power of laser pulse. Therefore, these transient properties can be an efficient approach to diagnosing the phase transitions of copper target when the laser irradiates the target surface.
%K laser-copper target
%K time-resolved spectrum
%K plasma radiation
%K the intensity of reflected beam<br>激光-铜靶
%K 时间分辨光谱
%K 等离子体辐射
%K 激光反射强度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=2C2DE33E892A8820E693A590AF6269D2&yid=99E9153A83D4CB11&vid=1D0FA33DA02ABACD&iid=E158A972A605785F&sid=ED39C7472AEFE329&eid=ED39C7472AEFE329&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=21