Study of the phoswich type scintillation fiber detector

研制了用于测量重离子放射治疗中辐射质量的小型光电型探测器。该探测器的探测部分由空心型CaF2晶体和液态有机闪烁体组成。我们利用光纤引出闪烁。本研究表明，利用加速器的实验结果，这种类型的探测器可以识别带电粒子和二次伽马射线。结果表明，要精确测量辐射质量，需要更高的能量分辨率。

We developed the small phoswich type detector for the measurements of the radiation quality in the heavy ion radiothrapy. The detection part of this detecor consists of the hollow type CaF2 crystal and liquid organic scintillator. And we lead out the scintillation using the optical fiber. This study has shown that this type detector is possible to identify charged particles and secondary gamma rays by the result of the experiment using accelerator. And it has shown that higher energy resolution of this detector is required for the measurement of the precise radiation quality.