Zhang Wen-Wen, Song Yu-Chao, Zheng Jin-Kun, Yang Yang, Bai Yong-Lin, La An-Peng, Duan Jin-Yao, Zhao Hua, Zhang Yan-Xin, Wang Fang
Xi'an University of Posts and Telecommunications, Xi'an 710121, China.
Key Laboratory of Ultra fast Photoelectric Diagnostic Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Xi'an 710119, China.
Rev Sci Instrum. 2024 Aug 1;95(8). doi: 10.1063/5.0202553.
This paper introduces a novel digital triangular-trapezoidal double-channel shaping algorithm to enhance the counting rate of resistive anode detectors. The algorithm is based on the trapezoidal shaping algorithm and improves it. At the extreme counting rate, the trapezoidal shaping algorithm cannot alleviate the pulse pileup, so the counting rate cannot meet the requirements of a high performance detector. The triangular-trapezoidal double-channel shaping algorithm is introduced in the resistance anode detector, which can replace the trapezoidal shaping filtering algorithm to process the output signal of the resistance anode detector and obtain the single photon position information. This improvement improves the counting rate of the resistor anode detector and reduces the resolution degradation caused by pulse pileup. The algorithm is simulated by System Generator software and implemented on FPGA (field programmable gate array). The triangular-trapezoidal double-channel shaping algorithm presented in this paper plays an important role in reducing electronic noise and pulse pileup. The algorithm is subjected to simulation testing, and it can recognize signals with a minimum pulse interval of 1 µs and counting rate up to 1000 kcps.
本文介绍了一种新颖的数字三角 - 梯形双通道整形算法，以提高电阻阳极探测器的计数率。该算法基于梯形整形算法并对其进行了改进。在极高计数率下，梯形整形算法无法缓解脉冲堆积，因此计数率无法满足高性能探测器的要求。在电阻阳极探测器中引入了三角 - 梯形双通道整形算法，它可以替代梯形整形滤波算法来处理电阻阳极探测器的输出信号，并获得单光子位置信息。这一改进提高了电阻阳极探测器的计数率，并减少了由脉冲堆积引起的分辨率下降。该算法通过System Generator软件进行了仿真，并在现场可编程门阵列（FPGA）上实现。本文提出的三角 - 梯形双通道整形算法在降低电子噪声和脉冲堆积方面发挥了重要作用。该算法经过了仿真测试，它能够识别最小脉冲间隔为1微秒且计数率高达1000kcps的信号。
