Image plate can be used as a two-dimension position-sensitive detector for positrons. In the sodium-22 source experiment, a linear relation between the positron fluence f(p) and output signal intensity fe+, b=1.38×10-5. Since the pixel size of the image plate was 25μm×25μm for the analyzer, we used it on our slow positron beam line and gained a meaningful picture, the slow positron beam spot and corresponding intensity could be shown at the same time. This two-dimensional position-sensitive detector is a extremely useful tool for detecting slow positron.%用成像板对常用正电子源22Na进行了一系列感光实验。结果显示，激发辐射的光子强度值f)成正比关系。在北京慢正电子束设备上进行了单能慢正电子的感光实验，结果表明，成像板是慢正电子的一种优良的二维位置灵敏探测器。
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