EAS热中子探测器阵列FADC电路设计  

The Design of the FADC Circuit for EAS Thermal Neutron Detector Array

作　　者：黄起昌 董春辉[1] 周荣[1] 杨朝文[1] HUANG Qi-chang;DONG Chun-hui;ZHOU Rong;YANG Chao-wen(Department of Nuclear Engineering and Technology,College of Physical Science and Technology Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学物理科学与技术学院,辐射物理与技术教育部重点实验室,成都610065

出　　处：《核电子学与探测技术》2018年第1期49-53,共5页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(11205108,11475121);四川大学优秀青年基金(2016SCU04A13)资助.

摘　　要：为解决广延大气簇射热中子探测器阵列中16台探测器的32路输出信号的信号获取与数据处理问题,设计了一种适用于宽动态范围的信号获取电路,包括前端模拟电路和高速高精度模数转换电路。测试结果表明:整个电路的动态范围为5~2 000 m V,电路噪声的方均根值小于0.8 m Vrms,5 m V输入信号分辨率小于12%,5 m V输入信号非线性程度小于20%。整体测试结果达到设计要求。In order to solve the problem of signal acquisition and data processing of 32 output slgnals from 16 detectors in an extended air shower （EAS） thermal neutron detector array, a signal acquisition circuit with a wide dynamic range, including front-end analog circuits and high-speed high-precision analog- to-digital conversion circuit （ADC） has been designed. The test results show that the dynamic range of the whole circuit is from 5- 2 000 mV, the RMS of circuit noise is less than 0. 8 mVrms, and the resolution and nonlinearity of the 5 mV input signal are respectively less than 12% and 20%. The overall test results meet the design requirements.

关 键 词：EAS热中子探测器 多通道 ADC 

分 类 号：TL822.6[核科学技术—核技术及应用]