阵列式反中微子探测系统模拟信号发生器设计  

Design of Analog Signal Generator for Array Antineutrino Detection System

作　　者：邵云东 何高魁[1] 王超 宛玉晴[1] 田华阳[1] SHAO Yundong;HE Gaokui;WANG Chao;WAN Yuqing;TIAN Huayang(China Institute of Atomic Energy,Beijing 102400,China)

机构地区：[1]中国原子能科学研究院,北京102400

出　　处：《核电子学与探测技术》2023年第4期712-718,共7页Nuclear Electronics & Detection Technology

基　　金：国家财政部稳定支持研究经费(WDJC-2019-05);装备预先研究领域基金(80927010101)。

摘　　要：使用阵列式塑料闪烁体探测器结合多通道电子学系统对反中微子进行探测是目前较为流行的探测方法,其以多路信号之间的能量-时间符合关系来甄别中微子事件,其电子学系统建立后,需要有符合理论算法关系的多通道随机模拟信号对系统进行测试,以验证系统是否具有预期的探测效果。介绍了一种符合式多通道模拟信号发生器的设计,可以产生满足要求的模拟信号,下位机部分利用高速FPGA作为主控制单元,控制32路DAC通道对外输出信号;上位机部分使用直接抽样方法对蒙特卡洛算法得出的数据生成信号的输出通道、输出幅度和预期输出时间,通过USB传输给FPGA,由FPGA对信号进行精确控制,以达到在多个通道上输出满足要求的信号的目的。测试表明,本系统产生的符合式多通道模拟信号满足反中微子探测的能量-时间符合要求,为复杂的多路仿核信号模拟发生器的研制与改进提供了新的思路。It is a popular detection method to use array plastic scintillator detector in combination with multi-channel electronic system to detect antineutrinos.It uses the energy time coincidence relationship between multi-channel signals to identify neutrino events.After the establishment of its electronic system,the system needs to be tested with multi-channel random analog signals that conform to the theoretical algorithm relationship to verify whether the system has the expected detection effect.The design of a kind of coincidence multi-channel analog signal generator is introduced,which can generate analog signals that meet the requirements.The lower computer uses high-speed FPGA as the main control unit to control 32 DAC channels to output signals.The upper computer uses the direct sampling method to transmit the output channel,output amplitude and expected output time of the signal generated from the data obtained by the Monte Carlo algorithm to the FPGA through USB,and the FPGA controls the signal accurately to achieve the purpose of outputting the signal meeting the requirements on multiple channels.The test results show that the coincidence multi-channel analog signal generated by the system meets the energy time requirements of anti neutrino detection,which provides a new idea for the development and improvement of the complex multi-channel analog generator of nuclear like signal.

关 键 词：反中微子 模拟信号 符合式 多通道 高精度D/A转换 

分 类 号：TL822[核科学技术—核技术及应用]