裂变电离室-前置放大器噪声分析及其抑制

Fission Chamber-Preamp Noise Analysis Method and Suppression

通过理论计算以及软件仿真的方法分析裂变电离室-前置放大器系统的噪声,分别得出了系统的等效噪声输出电压,结果对比误差较小,表明该分析结果可以作为参考噪声量。在此基础上进行实地噪声测量,对比实验测量和理论计算之间的关系得出,为了更好提高信号传输的准确性需要降低系统的固有噪声,并给出了几种噪声的抑制措施。

The noise of the fission ionization chamber-preamplifier system is analyzed through theoretical calculation and software simulation,and the equivalent noise output voltage of the system is obtained.The difference of the results is relatively small,indicating that the analysis result can be used as a reference noise amount.On this basis,the field noise measurement is carried out,and the relationship between experimental measurement and theoretical calculation is compared.In order to better improve the accuracy of signal transmission,the inherent noise of the system needs to be reduced,and several noise suppression measures are given.