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Photonic Crystal Based Radiochromic Film for Visualizing the Spatial Dose Distribution of Electron Beams
Zhihao Wang1, Jun Ma1,2, Xiaoyan Sun3,4
1College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China.
Summary
A novel photonic crystal (PC) polymer film dosimeter enables precise visualization of electron-beam (e-beam) dose and spatial distribution up to 3.75 MGy. This naked-eye readable technology offers high resolution and stability for high-dose irradiation applications.
Area of Science:
- Materials Science
- Polymer Science
- Radiation Physics
Background:
- Electron-beam (e-beam) technology is vital for high-dose (MGy) irradiation, requiring efficient dose delivery and uniform distribution.
- Accurate, real-time visualization of e-beam dose and spatial distribution is challenging due to high flux and electron scattering.
Purpose of the Study:
- To develop a high-resolution, wide-dose-range e-beam dosimeter for MGy-level applications.
- To enable immediate visualization of dose and spatial distribution in e-beam irradiation.
Main Methods:
- Development of photonic crystal (PC) polymer films for e-beam dosimetry.
- Characterization of dose-dependent changes in PC film diffraction peaks.
- Assessment of dosimeter stability under various environmental conditions.
Main Results:
- A photonic crystal polymer film dosimeter with a 0-3.75 MGy dose-response range and <100 μm spatial resolution was created.
- Increasing e-beam dose caused a continuous blue shift in the PC film's diffraction peak due to structural collapse.
- The dosimeter demonstrated excellent stability, resistance to environmental factors, and clear detection of e-beam scattering.
Conclusions:
- Photonic crystal polymer films offer a novel approach for MGy-level e-beam dose and spatial distribution detection.
- The study provides insights into the radiation degradation mechanisms of PC structures under high-dose e-beam irradiation.
- This naked-eye readable dosimeter enhances safety and precision in high-dose irradiation applications.
