Low-Energy X-Ray Dosimeter Using YAG:Yb Crystal-Derived Silica Fiber

The YAG:Yb crystal-derived silica fiber (YCDSF) was fabricated using the modified rod-in-tube (RIT) method. The distribution of elements and optical properties of the fiber samples were investigated through energy dispersive X-ray spectrometer (EDS), refractive index, transmission loss, and photoluminescence (PL) measurements. YCDSF served as the X-ray dosimeter probe. The radioluminescence (RL) characteristics of the dosimeter were investigated over a dose rate range of 0.944–4.267 Gy/min and a dose range of 0.314–1.422 Gy. The results show that the dosimeter has a certain linear relationship response. Repeatability test results show that the dosimeter exhibits both repeatability and stability. Simultaneously, the radiation response of the dosimeter was investigated within the X-ray tube voltage range of 40–80 kV. The outcomes reveal a discernible linear relationship for the dosimeter in the low-energy radiotherapy range. These results suggest that the fast ultraviolet (UV) scintillation properties of YAG:Yb hold potential for applications in remote radiotherapy and real-time dose monitoring.