堆泵浦^3He—Ar—Xe激光实验的放大管研制

A LASER CELL FOR REACTOR PUMPED ￣3He-Ar-xe LASING EXPERIMENTS

介绍了堆泵浦￣３Ｈｅ－Ａｒ－ｘｅ激光实验中放大管的设计及混合气的组成。经聚乙烯慢化体慢化后的ＣＦＥＲ－Ｈ脉冲堆的热中子注量率为６×１０～（１４）ｎ／ｃｍ￣２·ｓ，根据慢化体结构设计了内充气体组份为￣３Ｈｅ：Ａｒ：Ｘｅ＝３４．７：３４．７：０．２６７，６ｏｏｍｍ×Φ３４ｍｍ的放大管，在约１．４×１０￣（１６）裂变每脉冲下进行￣３Ｈｅ－Ａｒ－Ｘｅ（λ＝１．７３μｍ）激光激射实验，获得毫瓦级功率输出。

The Iaser cell configuration and gas compositions used in reactor pumped ￣3He-Ar-Xe lasing experiments are presented.The thermal neutron flux of CFBR-Ⅱ reactor, surrounded by high-density polyethylene to moderate the pulse of fastueutrons,is 6×10～(14)n/cm￣2·s. According to the structure of polyethylene,the gas compositions is ,￣3He:Ar:Xe=34.7: 34.7: 0.267, 6oomm×Φ34mm(KPa)and the laser cell is Φ 34mm×600mm.The output power is of the level of milliwatts in the first lasing test of reactor pumped ￣3He-Ar-Xe(λ=1.73μm).