低能电子束辐照关键计量参数测量技术研究

Electron beam irradiation has become an important part of the nuclear application industry. Low energy electron beam has been increasingly used in waste water treatment and food preservation, and the measurement parameters of irradiation are crucial to the irradiation quality. Since the relevant standards of electron beam dosimetry below 300keV have not been established, the parameter measurements are traced to the 10MeV electron linear accelerator, and the inconsistency of the measurement objects brings systematic bias. In this paper, for the low energy electrons below 300keV, the method of electron beam energy measurement is studied by combining test and simulation calculation, and the absorption dose measuring device based on calorimetry is developed. The relationship between absorbed dose and beam intensity, displacement velocity and other parameters is investigated. The results show that the energy parameters of low energy electrons are measured by the step stacking dose experiment combined with the energy deposition curve simulation, and the absorbed dose parameters of low energy electrons are measured by calorimetry. The measurement uncertainty is 11% (k=2). This study provides a reliable measurement guarantee for low-energy electron beam irradiation technology.