【摘要】 为了测量反应堆内中子注量率分布,保证反应堆内活化55 Mn-58 Ni合金探测片γ计数测量的可靠性,本文研制了中子注量率分布测量装置中9通道放大甄别器。多通道放大甄别器性能指标测试与应用测试结果表明:每个通道放大器增益1~21连续可调、甄别器阈值独立连续可调,具有最大计数率高、灵敏度高、稳定性好、系统抗串扰能力强等优点;放大器增益长期稳定性≤1%,甄别器最小输入脉冲宽度≥0.1μs,甄别器最大计数率≤4×106 s-1,能用于实时长期稳定测量反应堆内中子注量率分布。更多还原

【Abstract】 For the measurement of neutron fluence rate in reactor and reliable assurance ofγcount measurement of activated 55 Mn-58 Ni alloy irradiated foils in reactor,9-channel amplifier-discriminator was developed. The main technical parameter test and application test show that the gain of each channel amplifier-discriminator is continuously adjustable from 1to 21,the threshold of each discriminator circuit is continuously adjustable,the maximum count rate and sensitivity of discriminator circuit are high,and the system has stable property and excellent anti-interference.Inconclusion,relevant technical parameters can guarantee the real-time and long-term stable measurement of neutron fluence rate relative distribution in reactor,with the technical parameters that gain stability of amplifier is less than 1%,the minimum input pulse width of discriminator circuit is greater than 0.1μs,and the maximum count rate of discriminator is less than 4×106 s-1.更多还原