20 Channel 14MeV neutron detector electronics readout system

Abstract

In order to measure the neutron flux of 14 MeV, we designed a real-time data acquisition system which can supply power for 20 neutron detectors (crystal ST-401 and PMT) and collect neutron signals and count. The system can eliminate the interference of X and γ signals by using anti saturation front end circuit and pile up rejection, etc. The instrument operation panel, built by virtual instrument technology, can monitor the status of instrument in real time and analyze the measurement results. The results show that the typical value of the neutron rate is 10 Mc/s, the stability of the high voltage is less than ±2.5 V, and the timing error is less than 1ns, the system achieves the design goal of the 10 Mc/s average count rate, anti-saturation, and stable high voltage output of 20 channel.