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给出了为RHIC-STAR飞行时间探测器设计的多气隙电阻板室(MRPC)的辐照实验结果．实验采用 100mCi 60Coγ源,采用不同的剂量率对MRPC进行辐照．一个室在大剂量率2．87×10-2Gy／h下辐照了24h后, 其性能如噪声计数率,暗电流等均大大退化．另一个室在相对低剂量率5．31×10-4Gy／h下辐照了530h,其性能没有见到任何变坏．实验的目的是为了了解这种探测器在几年的运行中经过大剂量的辐照后的性能变化情况．
The experimental results of the irradiation of MRPC with RHIC-STAR time-of-flight detector are given. Experiments using 100mCi 60Coγ source, using different dose rates of MRPC irradiation. After a chamber was irradiated at a high dose rate of 2.87 × 10 -2 Gy / h for 24 h, its performance such as noise count rate, dark current, etc. greatly degraded. The other chamber was irradiated for 530 h at a relatively low dose rate of 5.31 × 10 -4 Gy / h without any deterioration in its performance. The purpose of the experiment was to understand how the performance of this detector after high-dose irradiation over several years of operation.