入射窗

入射窗所对应的实物光阑就是所要求的场光阑。

The physical stop which corresponds to the entrance window is then the required field stop .

其中，X射线入射窗的窗材是铝或铍。

The X-ray input window is made of aluminum or beryllium .

本文采用蒙特卡罗模拟计算方法，研究了塑料闪烁体探测器在测量定向剂量当量H′（0.07）时，探测器入射窗、塑料闪烁体厚度对能量响应和角度响应的影响，讨论了产生能量响应的原因；

The parameters of input-window thickness and plastic scintillator thickness are studied by Monte Carlo calculation for their influences on the energy response and angle response for electrons for measuring H ′( 0.07 ) .

γ射线穿过铁窗较铝窗产生的康普顿电子少，入射窗选择铁材料。

Comparing with aluminum window , the iron window produces less Compton electrons while the gamma rays pass through the input window . Thus , the iron was selected as the input window material .