强场下的Li-like氖复合机制X光激光的数值模拟  

NUMERICAL SIMULATION OF OPTICALLY IONISED LI LIKE NEON PLASMA RECOMBINATION X RAY LASERS

作　　者：邵云峰[1] Rose.,SJ 

机构地区：[1]北京应用物理与计算数学研究所

出　　处：《计算物理》1996年第4期454-458,共5页Chinese Journal of Computational Physics

摘　　要：论述了隧道电离和阈上电离加热过程。并把此二过程加到一个ｎｏｎＬＴＥ平均原子模型，用此模型来研究强场下光致电离类锂氖复合机制Ｘ射线激光。计算结果表明，当驱动激光脉冲为１００ｆｓ、波长为０２４８μｍ、功率密度为２×１０１７Ｗｃｍ２，氖气的密度为１０３ｇｃｍ－３时，类锂氖精细结构跃迁３ｄ５／２→２ｐ３／２（λ＝９８）的最大增益系数约为１００ｃｍ－１，其维持时间约为１５ｐｓ。A non LTE average atom model which has been modified to include tunnel ionisation and ATI heating is presented, and the model is applied to study the optically ionised Li like Ne recombination X ray laser. Results from the calculation show that high gain in Li like Ne at 9.8 nm can be produced with a 100 fsec duration, 0 248μm laser of intensity 2×10 17 Wcm -2 and the gas density of 10 -3 gcm -3 . The duration of X ray lasing is about 1 5 psec.

关 键 词：隧道电离 复合机制 X射线激光 

分 类 号：TN248[电子电信—物理电子学] TN241