电子束半导体探测器的测量精度易受到射线的能量、 剂量率、入射方向和环境温度等条件的影响。
The measurement accuracy of electron beam by using semiconductor detector is easily affected by beam energy, dose rate, beam incidence direction, environment temperature etc.
LCVR控制入射光子的偏振度，从而实现对自旋极化电子束极化方向的调制。
The production of spin-polarized electrons and the modulation of polarization direction with liquid crystal variable retarder (LCVR) are discussed.
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