分别利用单能的质子束及碳离子束辐照CR39，并制定了规范的刻蚀条件及流程。通过对处理完成后的数据进行详细处理，得到了质子及碳离子的径迹直径能量的响应曲线，可用于确定CR39上质子或碳离子的能量。以此为依据，得到了鉴别CR39上质子及碳离子的有效方法。在激光加速离子的实验中，通过测量CR39上的径迹大小及相对灰度，利用本文给出的标定数据，确认了质子径迹，得到了实验的质子能谱。

In laser proton acceleration experiments, identifying different ions in the ion products is a basic and important issue. In this paper, we accomplished a calibration experiment, in which the CR39 detector is irradiated by monoenergetic proton and carbon ion beams. With standard etching conditions we developed, their track diameter vs energy response curves were obtained. These curves were further applied to determining the energy of ions and distinguishing protons from carbon ions in our laser proton acceleration experiment. In this experiment, the diameter and relative gray of ion tracks were measured, proton tracks were picked out and proton spectra were obtained finally.