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Design and optimization of scanning magnets for HUST-PTF
Taiyan Chen1, Chen Zuo1, Zijian Zhou1
1State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, People's Republic of China.
The Review of Scientific Instruments
|October 2, 2021
Summary
Scanning magnets for proton therapy were optimized using thermal analysis to reduce heat from eddy currents. This ensures precise proton beam delivery for effective tumor treatment.
Area of Science:
- Medical Physics
- Particle Accelerator Technology
- Biomedical Engineering
Background:
- Proton therapy utilizes scanning magnets in pencil-beam nozzles to precisely control proton beam trajectories for tumor irradiation.
- AC-excited scanning magnets generate eddy currents, leading to significant temperature increases that can affect performance and safety.
Purpose of the Study:
- To investigate and mitigate the temperature rise in scanning magnets used for proton therapy beamlines.
- To optimize magnet design by analyzing eddy current effects and implementing slit modifications.
Main Methods:
- Transient electromagnetic and thermal analyses were employed to study eddy current phenomena.
- The maximum temperature rise served as the optimization criterion for slit geometry (depth, shape, distribution).
Main Results:
- Optimization of slit parameters significantly reduced the temperature rise in the scanning magnets.
- DC performance tests confirmed that the optimized magnets meet the required magnetic field specifications.
Conclusions:
- The study successfully demonstrates a method for controlling temperature in AC-excited scanning magnets for proton therapy.
- Optimized scanning magnets ensure reliable and precise proton beam delivery, crucial for advanced cancer treatment.
