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 M n-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。
For the measurement of neutron fluence rate in reactor and reliable assurance of γcount measurement of activated 55 M n-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 1 to 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 . In conclusion ,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 0.1 μs ,and the maximum count rate of discriminator is less than 4 × 106 s-1 .
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2014年第2期347-351,共5页
Atomic Energy Science and Technology
基金
中国核动力研究设计院委托项目资助
湖南省科技厅计划项目资助(2011GK3198)
衡阳市科技计划项目资助(2012KG73)
关键词
中子注量率
放大甄别器
放大器增益
最小输入脉冲宽度
最大计数率
neutron fluence rate
amplifier-discriminator
gain of amplifier
minimum input pulse width
maximum count rate