FPGA-based position reconstruction method for neutron beam flux spatial distribution measurement in BNCT

作     者：Wei Jiang Ping Cao Yi-Ming Wu Xian-Ke Liu Zhu-Jun Fang Zhi-Yong Zhang Bin Shi Jun Chen Wei Jiang;Ping Cao;Yi-Ming Wu;Xian-Ke Liu;Zhu-Jun Fang;Zhi-Yong Zhang;Bin Shi;Jun Chen

作者机构：State Key Laboratory of Particle Detection and ElectronicsUniversity of Science and Technology of ChinaHefei 230026China Department of Modern PhysicsUniversity of Science and Technology of ChinaHefei 230026China School of Nuclear Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026China National Key Laboratory for Metrology and Calibration TechniquesChina Institute of Atomic EnergyBeijing 102413China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2024年第35卷第3期

页      面：96-108页

核心收录：

学科分类：082704[工学-辐射防护及环境保护] 080902[工学-电路与系统] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0827[工学-核科学与技术] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(No.12075237) 

主　　题：Position reconstruction FPGA Readout electronics Neutron flux spatial distribution 

摘      要：A new measurement method for the spatial distribution of neutron beam flux in boron neutron capture therapy(BNCT)is being developed based on the two-dimensional Micromegas *** address the issue of long processing times in traditional offline position reconstruction methods,this paper proposes a field programmable gate array based online position reconstruction method utilizing the micro-time projection chamber *** method encapsulates key technical aspects:a self-adaptive serial link technique built upon the dynamical adjustment of the delay chain length,fast sorting,a coordinate-matching technique based on the mapping between signal timestamps and random access memory(RAM)addresses,and a precise start point-merging technique utilizing a circular combined *** performance test of the selfadaptive serial link shows that the bit error rate of the link is better than 10-12 at a confidence level of 99%,ensuring reliable data *** experiment utilizing the readout electronics and Micromegas detector shows a spatial resolution of approximately 1.4 mm,surpassing the current method’s resolution level of 5 *** beam experiment confirms that the readout electronics system can obtain the flux spatial distribution of neutron beams online,thus validating the feasibility of the position reconstruction *** online position reconstruction method avoids traditional methods,such as bubble sorting and traversal searching,simplifies the design of the logic firmware,and reduces the time complexity from O(n2)to O(n).This study contributes to the advancement in measuring neutron beam flux for BNCT.