第19卷第2期 2011年2月
文章编号
1004-924X(2011)02-0463-07
光学精密工程
Optics and Precision Engineering
脉冲紫外激光和X射线辐照AI
靶冲量耦合的异同性
王玉恒1.2，赵学庆1-2,谭晓莉"，刘峰1,2，丁升12
Vol. 19No. 2
Feb, 2011
（1.西北核技术研究所，陕西西安710024；2.激光与物质相互作用国家重点实验室，陕西西安710024）摘要：为了探索不同脉冲束辐照热-力学效应的相似性关系，同时为实验室开展激光模拟X射线热力学效应研究提供参考，分析了脉冲紫外激光(0.308μm)和X射线辐照A1靶喷射冲量的异同性。首先，对二者辐照热-力学效应机理的异同性进行了比较；其次，理论和实验研究了两种脉冲束辐照AI靶引起的喷射冲量，对较低能注量（小于100J/cm"）条件下两种脉冲束产生喷射冲量的大小进行了对比。研究结果表明，在低能量密度条件下（小于100J/cm")由于没有等离子体屏蔽现象，两种脉冲束辐照靶材产生喷射冲量的机理近似。相同能注量条件下，激光与X射线辐照AI靶产生的喷射冲
量具有相同的数量级，均小于10"，两种脉冲束在一定范围内具有一定的可比性。关键词：脉冲紫外激光；X射线铝靶；热-力学效应：喷射冲量；异同性
中图分类号：TN249
文献标识码：A
doi;10. 3788/(OPE, 20111902, 0463
Similarityanddistinctionbetweenimpulsecouplingwith
aluminum by pulsed ultraviolet laser and by X-ray
WANG Yu-hengl-2, ZHAO Xue-qing'-2, TAN Xiao-li', LIU Fengl-2, DING Sheng
(1.Northwest Institute of Nuclear Technology,Xi'an 710024,China;
2.StateKey Laboratory of Laser Interaction with Matter,Xi'an 710024,China)
Abstract: To investigate the similarity on thermo-mechanical effects induced by different pulsed beams, and also to give a reference for the experimental research of thermal and mechanical effects un-der X-ray radiation using simulation method of laser irradiation, the similarity and distinction between impulse coupling with an aluminum target by the pulsed ultraviolet laser(o. 3o8 μm) and X-ray were analyzed. Firstly, the contrast of the mechanism of thermo-mechanical effects between two pulsed beams was compared. Then, a comparative analysis for the quantity of blow-off impulse induced by two pulsed beams coupling with Al materials was performed in lower energy flux (<1oo J/cm°) by means of theory and experimental methods. The results show that the generation mechanisms of blow off impulse are similar in lower energy flux (<1oo J/cm°) for the pulsed ultraviolet laser and X-ray, because there are not a phenomenon of plasma shield. The quantity of impulse by these two pulsed beam irradiation has the same order of magnitude of impulse (<1lo') in same energy flux. Therefore,
收稿日期：2010-10-08；修订日期：2010-10-30.
基金项目：国防预研基金资助项目（No，9140A11020207KG21）