近年来,热释光辐射剂量测量方法得到了迅速发展。测量热释光的仪器种类很多,然而探测元件几乎全都采用光电倍加管,并经电子线路将光电倍加管输出的电信号放大、显示和记录下来。测光系统增益的稳定性就直接依赖于光电倍加管、光学系统及电信号放大系统的稳定性。 光电倍加管本身在运行期间由于各种因素影响,其增益将随时间,特别随温度而变化; In recent years, thermoluminescence radiation dose measurement methods have been rapidly developed. There are many types of instruments for measuring TL, however, almost all of the detection elements use photomultiplier tubes and amplify, display and record the electrical signals output by the photomultiplier tubes via electronic circuits. The stability of the metering system gain depends directly on the stability of the photomultiplier tube, optical system and electrical signal amplification system. The photomultiplier tube itself during operation due to various factors, its gain will change over time, especially with temperature;