长波长激光驱动Ni-like Ag 13.9nm X射线激光的理论研究  

Theoretical research on Ni-like Ag 13.9 nm X-ray laser driven by 3 μm or 6 μm wavelength laser

作　　者：张国平[1] 张覃鑫[1] 郑无敌[1] 

机构地区：[1]北京应用物理与计算数学研究所,北京100088

出　　处：《强激光与粒子束》2006年第3期405-409,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金重点项目资助课题(69989801);国家863计划项目资助课题

摘　　要：为了进一步深入理解掠入射驱动碰撞机制的特点与长处,以基频光正入射驱动为参照,用系列程序研究了6μm和3μm激光正入射驱动类镍银碰撞激发机制。在波长6μm的激光正入射驱动下,激光能量直接沉积到增益区,大大提高了增益区的电子温度;以5 J驱动能量,获得有效增益系数为20.7 cm-1的高增益和有效增益长度积为41.4的深度饱和增益,与波长1.053μm的正入射相比,以19%的驱动能量,使有效增益系数提高了60%。在波长3μm的激光正入射驱动下,激光能量沉积到增益区附近,大大提高了增益区的电子温度;以15 J驱动能量,获得有效增益系数为21.2 cm-1的高增益和有效增益长度积为42.4的深度饱和增益,与波长1.053μm的正入射相比,以57%的驱动能量,使有效增益系数提高64%。In order to understand the good qualities of the laser driving scheme with grazing incidence against to the scheme with normal incidence, the schemes of Ni-like Ag driven by normal incident lasers with long wavelengths of 6μm and 3μm were studied. Results show that for X-ray laser of Ni-like Ag, adopting laser with 6μm and 3 μm wavelength, the laser energy mainly deposites on gain region or nearby, the electronic temperature on gain region dramatically increases and the gain coefficients dramatically increase too. With 3 μm wavelength laser, using 5 J driven laser energy, an effective gain of 20. 7 cm^-1 and a deeply saturated gain with a gain length product being 41.4 can be obtained. Comparing to to laser driven, only 19% driven laser energy is needed, and the effective gain increases 60%. With 6 μm wavelength laser, using 15 J driven laser energy, an effective gain of 21. 2 cm^-1 and a deeply saturated gain with an effective gain length product of 42.4 can be obtained. Comparing to to laser driven, only 57% driven laser energy is needed, and the effective gain increases 64%.

关 键 词：X射线激光 类镍离子 电子碰撞激发机制 亚稳态 数值模拟 

分 类 号：TN246[电子电信—物理电子学] O432.12[机械工程—光学工程]