掠入射较高功率密度驱动Ni-like AgX射线激光的理论研究
Theoretical research on Ni-like Ag X-ray laser by grazing incidence in 4.3×1013 W·cm-2
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摘要: 用系列程序对掠入射方式驱动亚稳态类镍银碰撞激发机制进行了研究。继低功率密度驱动获得有效增益系数为23.8 cm-1结果之后，在4.3×1013 W·cm-2较高功率密度驱动时，增益区移到驱动激光折返点附近，有效增益系数达到40 cm-1以上，比正入射提高了2.4倍。用50 J激光能量驱动单靶，就能达到有效增益长度积为40的深度饱和增益。Abstract: An effective gain of 23.8 cm-1 has been got at 1.2×1013 W·cm-2. In this paper, using series codes, quasi-stable Ni-like Ag collisional excitation scheme driven by laser with grazing incidence is studied. Compared with normal incidence, at a drive intensity of 4.3×1013 W·cm-2, the laser energy is mainly deposited on the gain region. The electronic temperature on gain region can be dramatically increased and the gain coefficients can also be dramatically increased. Its effective gain reaches 40 cm-1, which is 3.4 times of that of normal incidence. If 50 J laser energy is used to drive a single target, deeply saturated gain with a gain length product of 40 can be got.
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