Speaker
Description
Cyclotron-based proton beams used in clinical proton therapy typically operate at nanoampere (nA) current levels, presenting significant challenges for online, non-invasive, and high-precision beam current diagnostics. We report the development of a compact resonant-cavity beam detector enhanced by metamaterial unit structures, enabling substantial cavity miniaturization and improved detection sensitivity. The design, fabrication, and experimental characterization of the detector are presented. Cold-test measurements show linear signal response and high sensitivity across the operational range. The detector provides a compact and reliable solution for beam current monitoring in proton therapy systems, and its capability for real-time proton energy measurement offers additional benefits for treatment safety.
Funding Agency
Work supported by the Nuclear Technology R&D Program under Project Numbers HJSYF2024(05) and the National Key Research and Development Program of China under Project Numbers 2022YFA1602202.
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