高真空低温下红外探测器窗口吸附物的分析

Property analysis of window sorbate of infrared detector working at ultralow temperature in ultravacuum

利用X射线光电子能谱、红外喇曼反射谱和红外透射谱,研究了在超高真空环境下,红外探测器在电老化一段时间后,其表面镀ZnS的Ge窗口材料表面的变化情况。对比电老化前后的两种探测器窗口的实验结果,表明探测器窗口上的吸附物可能来自真空腔内的易放气部件,如连接导线的外皮。

XPS, Raman spectrum and infrared transmittance spectrum were used to study the surface of Ge window on infrared detector, which was electron -aged in ultravacuum after some time. And Ge window was covered with a thin film of ZnS. Comparing the experimental result of the detector window of non-electron aged with the result of the one after electron aged, it is shown that the sorbate of detector window perhaps comes from easily deflating parts in vacuum chamber, such as connection wires'coats.