1：Experimental Design and Method Selection:

The study used a YAP(Ce) scintillator plate optically coupled to a position-sensitive photomultiplier (PSPMT) to develop a radiation imaging detector. The Anger principle was employed to calculate radiation positions.

2：Sample Selection and Data Sources:

The performance of the detector was evaluated using alpha particles (5.5 MeV from Am-241), gamma photons (122 keV from Co-57, 60 keV from Am-241), X-rays (~32 keV from Cs-137), and beta particles (maximum energy of 254 keV from Ca-45).

3：5 MeV from Am-241), gamma photons (122 keV from Co-57, 60 keV from Am-241), X-rays (~32 keV from Cs-137), and beta particles (maximum energy of 254 keV from Ca-45). List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: A 0.5 mm thick YAP(Ce) plate, a 25.4 mm square HQE PSPMT (R8900-100-C12, Hamamatsu Photonics), silicone rubber (KE420, Shin-etsu Silicone), and a tungsten slit mask were used.

4：5 mm thick YAP(Ce) plate, a 4 mm square HQE PSPMT (R8900-100-C12, Hamamatsu Photonics), silicone rubber (KE420, Shin-etsu Silicone), and a tungsten slit mask were used. Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: The detector was tested with different radiation sources to measure spatial and energy resolutions. The PSPMT was supplied with high voltage, and the output signals were processed to form images and energy spectra.

5：Data Analysis Methods:

Spatial resolution was evaluated using slit masks, and energy resolution was determined from energy spectra derived from regions of interest on the images.