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Design of cyclotron magnet with tenth harmonics for accelerator mass spectrometry

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Abstract

In this study, we developed a carbon-beam cyclotron for accelerator mass spectrometry (AMS). A cyclotron magnet for AMS was developed for particle acceleration systems using cyclotrons rather than the tandem accelerator used in conventional accelerator mass spectrometry systems. Design parameters were selected for the development of cyclotrons for AMS, and the magnetic field design and equilibrium orbit (EO) analysis beam trajectory were analyzed using the Cyclone and CST Microwave Studio. Additionally, by measuring the magnetic field of the manufactured cyclotron, magnetic field optimtableization was performed through shimming, and the beam trajectory was verified based on the measurement results. The cyclotron magnet was designed with a mass resolution of 2890, with harmonic 10 and turn number 92. The minimum turn separation was optimized at 2 mm to reduce the loss caused by the collision of the beam during acceleration. This cyclotron for AMS could accelerate the 12C, 13C, and 14C particles at 40 keV to obtain a beam of 400 keV.

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Acknowledgements

This paper was supported by Radiation Technology R&D program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning. [2017M2A2A4A02020347, Development of an Accelerator Mass Spectrometer based on Artificial Intelligence]. This work was supported by the Korea Medical Device Development Fund grant funded by the Korea government (the Ministry of Science and ICT) (Project Number: 1711135001, KMDF_PR_20200901_0042)

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Correspondence to J. S. Chai.

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Namgoong, H., Choi, H., Ha, D. et al. Design of cyclotron magnet with tenth harmonics for accelerator mass spectrometry. J. Korean Phys. Soc. 82, 147–153 (2023). https://doi.org/10.1007/s40042-023-00720-1

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