Research on Total Radiation Dose Detector Based on Fiber Induced Loss

With the wide application of radiation in the fields of space orbit, medical treatment, food, etc., the online monitoring of the total radiation dose becomes particularly important. A method for designing a total radiation dose sensor in a high-dose environment using ordinary quartz fiber has been proposed. The energy deposition attenuation model of the cylindrical probe was established, and the energy deposition results after penetration of the copper attenuation layer with a thickness of 0.1mm-1mm were simulated using geant4, which showed a high consistency with the attenuation model. Experiments have verified that the attenuation curve caused by the induced loss of the fiber exhibits a saturation phenomenon when the attenuation thickness is 0.5mm and works in the linear section at 1mm and 1.5mm. It also shows that the model can be used to make a high-dose radiation sensing system with ordinary quartz fiber and the design provides a theoretical basis.