Ultrahigh resolution radiation imaging system using an optical fiber structure scintillator plate

Area of Science:

• Nuclear instrumentation
• Radiation detection
• High-energy physics instrumentation

Background:

• Accurate radioisotope distribution measurements require high-resolution radiation imaging.
• Applications include nuclear facilities and high-energy physics experiments.
• Existing methods face limitations in achieving ultrahigh spatial resolution.

Purpose of the Study:

• To develop an ultrahigh-resolution radiation imaging system.
• To demonstrate its capability for imaging alpha, beta, and gamma radiation interactions.
• To improve spatial resolution in radiation detection.

Main Methods:

• Utilized a ~1-μm diameter fiber-structured Gadolinium Aluminum Oxide:Cerium (GdAlO3:Ce) / alpha-Alumina (α-Al2O3) scintillator plate to minimize light spread.
• Optically coupled the scintillator plate to a tapered optical fiber plate for image magnification.
• Integrated the system with a lens-based, high-sensitivity CCD camera.

Main Results:

• Achieved a spatial resolution of approximately 25 μm for imaging alpha particles.
• Successfully observed various image shapes for beta particles, clearly delineating electron trajectories.
• Observed varied image shapes for gamma photons, with secondary electron trajectories visible in some instances.

Conclusions:

• The developed system, combining a fiber-structured scintillator plate, tapered optical fiber plate, and high-sensitivity CCD camera, achieves ultrahigh resolution.
• This method is a promising approach for visualizing radiation interactions within scintillators.
• The system offers significant potential for applications requiring precise radiation imaging.