激光金属汽化汽离混合区状态参量的稳定性及其影响因素分析  

Analysis of stability and it's influencing factor for state parameter in the area of steam and ion mix under laser irradiation metal

作　　者：张可言[1] 陶冶[1] 

机构地区：[1]长江师范学院物理系,涪陵408003

出　　处：《原子与分子物理学报》2007年第4期810-816,共7页Journal of Atomic and Molecular Physics

基　　金：重庆市教委自然科学基金(KJ061308)

摘　　要：在汽离混合区激光强度时空修正的基础上,近似求解了流体力学模型下的状态参数,找出了稳定状态参数的共同自洽参量,分析了自洽参量的取值方法,研究了相关参数对自洽参量的影响机制,结果发现:(1)汽离混合区内,状态参量的稳定性可用自洽参量的稳定性来表征;(2)当入射激光强度小于108W.cm-2时,自洽参量随入射激光强度变化相对较快,稳定性差;当激光强度大于108W.cm-2时,自洽参量随入射激光强度变化相对较慢,稳定性高;(3)汽离混合区各处的约化自洽参量随辐照激光的波长成变周期增加的变化,波长越长,约化自洽参量越大;(4)要使自洽参量稳定,纹波较小,宜采取短波激光辐照;(5)当蒸汽压强小于2.7×106Pa时,自洽参量随蒸汽压强成指数递减规律变化;当蒸汽压大于2.7×106Pa时,自洽参量与蒸汽压强之间没有对应关系.The approximate state parameter had been given under hydromechanics model, Common self-consis- tent parameter of the stabilize state parameter had been found out, Take value method of self-consistent parameter had been analyzed, The influence machinemade of related parameter is for self-consistent parameter had been studied on the foundation of the space-time correction of laser strength in The area of steam and ion mix, Discover as a result： （1）The stability of self-consistent parameter can be used to show the stability of state parameter in the area of steam and ion mix, （2） Self-consistent parameter is more rapid relatively with incident laser strength change ,and stability is difference, When incident laser strength is smaller than 10^8 W·cm-2; Self-consistent parameter is more slow relatively with incident laser strength change , and stability is high, When incident laser strength is larger than 10^8 W·cm-2, （3） The brief selfconsistent parameter is change of period increase with wavelength of irradiation laser in each place of area of steam and ion mix, The more wavelength grows, the more brief self-consistent parameter is big, （4） Want make self-consistent parameter to stabilize and ripple is less, suitable adopt the laser irradiation of short wave, （5） Self-consistent parameter is index decrease law to change with steam pressure when steam pressure is smaller than 2.7 × 10^6 Pa. Self-consistent parameter and steam pressure are unconcerned when steam pressure to be larger than 2.7× 10^6 Pa.

关 键 词：激光辐照 汽离混合区 状态参量 自恰参量 稳定性 

分 类 号：Q241[生物学—细胞生物学]