Semi-gas kinetics model for performance modeling of flowing chemical oxygen-iodine lasers(COIL)  

作　　者：GAO Zhi HU Limin SHEN Yiqing 

机构地区：[1]Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2004年第3期338-351,共14页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.10032050).

摘　　要：A semi-gas kinetics (SGK) model for performance analyses of flowing chemical oxygen-iodine laser (COIL) is presented. In this model, the oxygen-iodine reaction gas flow is treated as a continuous medium, and the effect of thermal motions of particles of different laser energy levels on the performances of the COIL is included and the velocity distribution function equations are solved by using the double-parameter perturbational method. For a premixed flow, effects of different chemical reaction systems, different gain saturation models and temperature, pressure, yield of excited oxygen, iodine concentration and frequency-shift on the performances of the COIL are computed, and the calculated output power agrees well with the experimental data. The results indicate that the power extraction of the SGK model considering 21 reactions is close to those when only the reversible pumping reaction is considered, while different gain saturation models and adjustable parameters greatly affect the output power, the optimal threshold gain range, and the length of power extraction.A semi-gas kinetics (SGK) model for performance analyses of flowing chemical oxygen-iodine laser (COIL) is presented. In this model, the oxygen-iodine reaction gas flow is treated as a continuous medium, and the effect of thermal motions of particles of different laser energy levels on the performances of the COIL is included and the velocity distribution function equations are solved by using the double-parameter perturbational method. For a premixed flow, effects of different chemical reaction systems, different gain saturation models and temperature, pressure, yield of excited oxygen, iodine concentration and frequency-shift on the performances of the COIL are computed, and the calculated output power agrees well with the experimental data. The results indicate that the power extraction of the SGK model considering 21 reactions is close to those when only the reversible pumping reaction is considered, while different gain saturation, models and adjustable parameters greatly affect the output power, the optimal threshold gain range, and the length of power extraction.

关 键 词：chemical oxygen-iodine laser (COIL)  semi-gas kinetics (SGK) model  rate equation (RE) model  homogeneous broadening  INHOMOGENEOUS broadening  PERFORMANCE analysis  spectral line BROADENING (SLB) model. 

分 类 号：N[自然科学总论]