吸收剂量基准石墨量热计基本性能分析

作为吸收剂量基准的石墨量热计,对于量值复现有很高要求。分析说明了NIM的石墨量热计系统的主要技术性能,包括:温度控制,电能（功率）测量,电能-辐射能量转换关系,以及吸收剂量基准值复现测量,并给出得到的结果 。对有关的技术性能指标进行说明,同时给出其随时间的变化（稳定性）。作为基准绝对测量旁证检验,对石墨比热容进行测定,与BIPM测定的结果进行比较,偏差在0.1%以内。

Basic Performance Analysis on Graphite Calorimeter for Primary Standard of Absorbed Dose

As the standard of the absorbed dose, graphite calorimeter demands high recurrence rate. Analysis shows the performance of the graphite calorimeter system of NIM, the measurement of electric energy (power), the conversion relation between electric energy and radiation energy, and the measurement of the value of the absorbed dose reproduction. Related technical index was explained, meanwhile, it's stability was given. In order to test the measurement of the standard, specific heat capacity was measured. The measurement results was complared with BIMP's results, deviation is less than 0.1%.