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Description
Boron neutron capture therapy (BNCT) is attracting increasing attention. This paper presents the structural design and error analysis of a radio frequency quadrupole (RFQ) accelerator currently being fabricated for BNCT applications. The RFQ is designed to accelerate a 15 mA proton beam to 2.5 MeV, with a total length of 4.7 m divided into four segments, each approximately 1.2 m long. Various types of machining imperfections may inevitably exist after the final assembly of the cavity. Since these imperfections can significantly affect the RF performance and field distribution of the RFQ, tuners are provided on the cavity to compensate for such manufacturing errors. To predict the potential impact of these errors on cavity performance and to evaluate the effectiveness of the tuners, several possible structural error patterns were modeled in a CST simulation environment based on the RFQ cavity model. The simulation results reveal how these errors affect the high-frequency and electromagnetic characteristics of the RFQ and confirm the effectiveness of a proposed tuning algorithm.
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*lizhihui@scu.edu.cn
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