中文摘要：

中国科学院近代物理研究所利用兰州重离子加速器提供的80～100MeV／μ的^12C束流进行了浅表层恶性肿瘤治疗的临床试验。本文描述了重离子治癌中的束流监测装置，采用塑料闪烁探测器监测束流强度的稳定性并控制照射剂量，平行板雪崩计数器（PPAC）测量束流剖面的均匀性。浅层治癌的临床试验表明该束流监测装置能很好地实现对束流性能状态的监测。

英文摘要：

The program of heavy ion shallow tumor therapy has been started. The beam monitor system for the therapy is described in this paper. It is composed of plastic scintillator, which used to monitor the stability of beam intensity and control the irradiation dose, and PPAC which is to measure the beam homogeneity in the irradiation area. This system has shown good performance in the clinic experiments of the shallow tumor therapy.