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在不透明靶的前角反冲测量中,对束流与靶表面的夹角精度要求较高。当这一夹为角15°±1°时观引起有效靶厚误差为6—7%。我们实验室的散射室,原设计没有考虑这一角度的测量。为测这一角度,对散射室做了一点改进。方法简单易行。在位于散射室中心的靶杆(图1)上端,装一个平面反射镜的镜架(图1a)。镜架要能绕靶杆转动轴相对靶杆转动,镜架转动中心必须与靶杆转动轴重合亦即使靶杆转动轴位于镜架转动中心面上。
In opaque target back-angle measurement of backflush, the accuracy of the angle between the beam and the target surface is high. When this clip angle of 15 ° ± 1 ° view caused by the effective target thickness error of 6-7%. The scattering chamber of our laboratory, the original design did not consider the measurement of this point. To measure this point, a little improvement has been made to the scattering chamber. The method is simple and easy. At the upper end of the target rod (Figure 1) located in the center of the scattering chamber, mount a flat mirror frame (Figure 1a). The frame should be able to rotate about the target shaft relative to the target shaft, the center of rotation of the frame must coincide with the target shaft rotation axis even if the target shaft rotation axis is located on the rotation center of the frame.