Abstract
A high-intensity continuous-wave (CW) radio frequency quadrupole (RFQ) accelerator is designed for boron neutron capture therapy. The transmission efficiency of a 20-mA proton beam accelerated from 30 keV to 2.5 MeV can reach 98.7% at an operating frequency of 200 MHz. The beam dynamics have a good tolerance to errors. By comparing the high-frequency parameters of quadrilateral and octagonal RFQ cross sections, the quadrilateral structure of the four-vane cavity is selected owing to its multiple advantages, such as a smaller cross section at the same frequency and easy processing. In addition, tuners and undercuts are designed to tune the frequency of the cavity and achieve a flat electric field distribution along the cavity. In this paper, the beam dynamic simulation and electromagnetic design are presented in detail.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Liang Lu and Zhi-Chao Gao. The first draft of the manuscript was written by Zhi-Chao Gao, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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This work was supported by the National Natural Science Foundation of China (Nos. 11535016, 11675236, 12075296, 11775284)
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Gao, ZC., Lu, L., **ng, CC. et al. Design of a 200-MHz continuous-wave radio frequency quadrupole accelerator for boron neutron capture therapy. NUCL SCI TECH 32, 23 (2021). https://doi.org/10.1007/s41365-021-00859-1
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DOI: https://doi.org/10.1007/s41365-021-00859-1