氟化镁窗口氘灯真空辐射衰减特性研究

对氟化镁材料窗口、紫外-真空紫外波段辐射传递标准光源氘灯的真空辐射衰减机理进行了分析。在此基础上，研制了液氮制冷屏装置来抑制氘灯衰减。建立了氘灯真空辐射特性测试研究系统，利用该系统对液氮制冷屏装置的有效性进行了考察。测试结果表明，在160-300nm波段，氘灯平均衰减率可由原来的7%/h下降为1%/h。液氮制冷屏装置能十分有效的抑制氟化镁窗口氘灯在真空环境下的辐射衰减。

Study on radiation degradation characteristics of MgF2 windowed deuterium lamp in vacuum environment

Analyze the vacuum radiation degradation mechanism of the MgF2 windowed, UV -VUV radiation transfer standard source deuterium lamp. Based on this, develop a liquid nitrogen cooled screen device to control the degradation of deuterium lamp. The instrument used for studying the radiation characteristics of deuterium lamp in vacuum environment is established. The effectiveness of the liquid nitrogen cooled screen device is studied. The experimental results show that, In 160-300 nm, the average degradation rate of deuterium lamp decreases from 7% / h to 1% / h. Liquid nitrogen cooled screen device can very effectively control the radiation degradation of MgF2 windowed deuterium lamp in a vacuum environment.