Theoretical study on interaction of neon like Ge X-ray lasers in gain saturation

Theoretical study on interaction of neon like Ge X-ray lasers in gain saturation 1 first-author Institute of Applied Physics and Computational Mathematics, Beijing 100088 Institute of Applied Physics and Computational Mathematics, Beijing 100088 By coupling the radiation transport equations and rate equations of X-ray laser, gain saturation process of several X-ray lasers in Ne-like Ge plasma is studied and simulated results are compared with calculation of the usual saturation equation. The great differences have been found in deep saturation stage. Simulated results also show the "burn-hole" in gain curves and decrease and increase in line width with increasing target length before and after saturation. X-ray laser Ne-like Ge Radiation transport equation Rate equation Gain saturation Stimulated emission References MacGowan B J , DaSilva L B , Fields D J et al . Phys Fluids B , 1992 ; 4 : 7 Phys Fluids B Wang Shiji , Gu Yuan , Zhou Guanlin et al . Chinese Phys Lett , 1991 ; 8 : 618 Chinese Phys Lett Carrillon A , Chen H Z , Dhez P et al . Phys Rev Lett , 1992 ; 68 : 2917 Phys Rev Lett Zhang Guoping , Sheng Jiatian , Yang Minglun et al . High Power Laser and Particle Beams (in Chinese) , 1992 ; 4 ( 4 ): 521 - 530 High Power Laser and Particle Beams (in Chinese) Wang Shiji , Gu Yuan , Zhou Guanlin et al . High Power Laser and Particle Beams (in Chinese) , 1992 ; 4 ( 2 ): 165 — 174 High Power Laser and Particle Beams (in Chinese) Li Shichang . High temperature radiation physics and quantum radiation theory (in Chinese) . Beijing : National Defence Industry Publishing House , 1992 ; 71 High temperature radiation physics and quantum radiation theory (in Chinese) Yang Hanyang , Qiu Yanghui , Li Shichang et al . J Phys B At Mol Opt Phys , 1992 ; 25 : 791 — 798 J Phys B At Mol Opt Phys Hummer D G , Rybicki G B . Astrophys J , 1982 ; 254 : 767 Astrophys J Casperson L W and Yariv A . IEEE J Quant Elec , 1972 ; QE-8 ( 2 ): 80 - 85 IEEE J Quant Elec Casperson L W . J Appl Phys , 1977 ; 48 ( 1 ): 256 - 262 J Appl Phys *The Project Supported by the Laser Technique Special Topic of National High-Technique Plan 1995-09-25 1996-02-01 2021-02-05 1996 Nuclear Science and Techniques 01 07