同时，研究了在加速器停机后真空室内部的剩余辐射剂量场分布及其随时间的衰减规律。

At the same time, the residual radiation field distribution in the vacuum tank and its decay with time were estimated after the machine is shut down.

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组织损伤是阈值过程，每条剂量曲线可被视为阈值曲线，损伤程度随距离的增加呈指数衰减。

Tissue damage is a threshold process, each dose curve can be regarded as the threshold curve, degree of injury increases exponentially with distance attenuation.

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