气压对激光诱导Al等离子体温度的影响  

The Effect of Ambient Pressure on Electron Temperatureof Al Plasma Induced by Laser

作　　者：李尊营[1] 王成文[1] 

机构地区：[1]山东临沂师范学院物理与电子科学系,山东临沂276005

出　　处：《激光与红外》2004年第5期334-336,共3页Laser & Infrared

摘　　要：用Nd∶YAG脉冲激光烧蚀Al靶获得Al等离子体,利用时空分辨技术采集等离子体的时空分辨信息。用Ar气作保护气体,记录了100kPa、10kPa、1kPa、0.1kPa气压下的时空分辨谱。借助Ar+离子丰富的特征谱线,计算等离子体电子温度,从而估算Al等离子体的温度。结果发现:10kPa气压下,Ar+离子辐射相对较强,谱线最清晰,最有利于电子温度的计算;气压降低时,Ar+离子辐射减弱,但0.1kPa时仍采集到清晰的Ar+离子辐射;100kPa气压下,Ar+离子辐射很弱,不能计算电子温度;气压对Ar+离子辐射影响很大,但对等离子体离子辐射时期的温度影响不大,后三种气压下的估算温度大约都是20000K。With a pulsed Nd∶YAG laser beam ablating aluminum target, Al plasma was obtained. The radiation of the plasma was captured with time-and space-resolved technique. The information of the radiation was record under ambient pressure 100kPa、10kPa、1kPa、0.1kPa, respectively. Based on so many of characteristic lines of Ar^+, the electron temperature of the plasma was approximately calculated, and so was obtained to the plasma temperature. As the results, under pressure 10kPa, the radiation of Ar^+ was in best favor of electron temperature calculating, because in this case, the radiation was relatively stronger, and the lines were more distinct, than other cases. With pressure decreased, the radiation of Ar^+ was reduced, but the lines were still distinct under 0.1kPa. Under pressure 100kPa, the radiation of Ar^+ was so faint that one couldn't calculate the electron temperature according to it. The ambient pressure deeply effected on the radiation of Ar^+, but didn't on the electron temperature in this stage. The electron temperatures were all about 20000K in the latter three cases

关 键 词：AL等离子体 电子温度 时空分辨谱 特征谱线 气压 激光诱导 射影 体温 影响 采集 

分 类 号：TN241[电子电信—物理电子学] O536[理学—等离子体物理]