【作者】 吴文欢； 李怀申； 濮亚男； 陈少佳； 赵豫斌； 魏微； 江晓山；

【Author】 Wu Wenhuan;Li Huaishen;Pu Yanan;Chen Shaojia;Zhao Yubin;Wei Wei;Jiang Xiaoshan;Institute of High Energy Physics;State Key Laboratory of Particle Detection and Electronics;Hunan University,School of Physics and Electronics;

【机构】 中国科学院高能物理研究所； 核探测与核电子学国家重点实验室； 湖南大学物理与微电子科学学院；

【摘要】 本文研制了一款适用于散裂中子源闪烁体探测器中光电倍增管(PMT)的专用集成电路(ASIC),该芯片能根据入射的中子和γ信号特征,过放大、成形、甄别都一系列的处理,对中子和γ进行甄别,从而实现对中子和γ信号鉴别的功能。芯片共包含16个模拟通道,其中每通道电路都包括前置放大、成形、甄别等功能模块,最后由单稳态电路输出甄别结果。芯片的分辨误差小、单通道计数率高,单通道甄别器阈值5-bit可调,模拟电路部分线性度高。初步测试结果表明芯片功能正常、性能良好,达到预期设计目标。更多还原

【Abstract】 A digital readout ASIC applied for CSNS SSND PMT is developed this paper. The chip discriminated γ and the neutron according to their attributes after through the detector. The chip includes 16 analog channels; each channel contains charge pre-amplifier, shaper, discriminator and mono-stable block. The discriminating results output by mono-stable block. The chip has small resolution error, high counting rate, adjustable threshold provided by 5-bit DAC each channel. The analog circuit has high linearity. The measurement results says that the chip’s function is correct and has a good performance, has reached the expected specification.更多还原