散裂中子源通用粉末衍射谱仪读出ASIC设计  

A Readout ASIC Designed for General Purpose Powder Diffractometer of CSNS

作　　者：肖腾飞[1,2] 张研[1,2] 王庆娟[1,2] 刘湘[1,2] 王炜[1,2] 

机构地区：[1]核探测与核电子学国家重点实验室(中国科学院高能物理研究所),北京100049 [2]中国科学院大学,北京100049

出　　处：《核电子学与探测技术》2013年第10期1169-1174,共6页Nuclear Electronics & Detection Technology

摘　　要：介绍了一款针对散裂中子源通用粉末衍射谱仪的读出电子学系统[1]所设计的ASIC芯片MPR2。该芯片包含模拟和数字两个部分。模拟部分集成了64通道,是对针对MAPMT设计的芯片MAPMTROC[2]的升级。每个通道包含基于电流传输器的前置放大器、RC积分电路、CR-RC积分成形电路以及比较器等部分,分别实现增益调节、积分、积分成形和甄别输出等功能。数字部分将模拟输出的甄别结果进行并串转化后输出。要求芯片能够有效地甄别中子和γ信号,并给出中子信号的时间和位置信息。It describes an ASIC chip MPR2 mainly used in General Purpose Powder Diffractometer readout elec- tronics system of Chinese Spallation Neutron Source. The chip contains both analog and digital parts. The ana- log part integrated 64channels, upgrading from the chip MAPMTROC designed for MAPMT. Each channel con- tains a preamplifier based on current convey, a RC integrator circuit, a CR - RC integrator - shaping circuit and a comparator, to respectively achieve the gain adjustment, integral, integral - shaping and screening out- put. The digital part converts the screening outputs parallel to serial. The chip is designed to effectively screen neutron and gamma signal, and give the time and location information of the neutron signal.

关 键 词：多阳极光电倍增管 ASIC 中子鉴别 电流传输器 

分 类 号：TL81[核科学技术—核技术及应用]