加速器中粒子从真空系统通过引出窗进入加速器外部空间。3 MeV质子加速器使用Kapton膜作引出窗口。采用蒙特卡罗方法模拟计算了3 MeV质子在不同厚度Kapton膜内的能量损失,并同采用钛作为引出窗时质子的能量损失进行了比较。图1为3MeV质子在不同厚度Kapton膜内的能量损失。计算结果表明,3 MeV质子在引出窗内的能量损失随窗厚度的增加而增加,且在钛作为引出窗内的能量损失为53%。 The particles in the accelerator pass from the vacuum system through the lead-out window into the accelerator outer space. The 3 MeV proton accelerator uses Kapton membrane as the exit window. The energy loss of 3 MeV protons in Kapton membrane with different thickness was simulated by Monte Carlo method and compared with that of proton in the case of using titanium as the exit window. Figure 1 shows the energy loss of 3 MeV protons in different thickness Kapton membranes. The calculated results show that the energy loss of 3 MeV protons in the lead-out window increases with the increase of the thickness of the window, and the energy loss in the lead-out window of titanium is 53%.