长波长激光驱动Ni-like Ag 13.9 nmX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
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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6 mm和3 mm激光正入射驱动类镍银碰撞激发机制。在波长6 mm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1.053 mm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3 mm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1.053 mm的正入射相比，以57%的驱动能量，使有效增益系数提高64%。Abstract: 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 6 μm and 3 mm were studied. Results show that for X-ray laser of Ni-like Ag, adopting laser with 6 μm and 3 mm 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 mm 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 1w laser driven, only 19% driven laser energy is needed, and the effective gain increases
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