直线加速器隧道内存在着一个具有特定时间结构和空间分布的强瞬发辐射场，它主要由轫致辐射和中子组成。用丙氨酸剂量计和电子自旋共振（ＥＳＲ）方法进行测量，得到隧道内关键位置的三维空间辐射场分布。这对于了解加速器的运行状态和射线积累剂量对各种有机材料的损伤程度是有意义的。速调管走廊内的辐射场主要是由于大功率速调管的运行造成的，因各个速调管参数不一致而使各点的辐射剂量呈现出较大的差异。但速调管走廊内的辐射水平不太高，故允许人员有条件地进入其中工作，因此在辐射安全联锁系统中将其定为可绕过的联锁点。本文简单介绍国家同步辐射实验室这两处辐射场的特点，并对其测量的方法和结果进行了叙述和讨论 The existence of a strong temporal radiation field with a specific temporal structure and spatial distribution in the linear accelerator tunnel mainly consists of Bremsstrahlung and neutrons. Measured by alanine dosimeter and electron spin resonance (ESR) method, the distribution of the radiation field in the three-dimensional space at the key position in the tunnel was obtained. This makes sense for understanding the state of operation of the accelerator and the extent to which the accumulated radiation dose damages various organic materials. The radiation field in the klystron corridor is mainly caused by the operation of the high-power klystron tube. Because of the inconsistent parameters of the klystrons, the radiation dose at each point shows a big difference. However, the level of radiation in the klystrons is not high enough to permit the workers to enter the workforce conditionally and, therefore, be defined as an interlocking point that can be bypassed in the radiation safety interlocking system. This article briefly introduces the characteristics of the two radiation fields in the national synchrotron radiation laboratory and describes and discusses the measurement methods and results