Design and verification of a radiation detector's electronics system

摘要

The electronics system is a crucial component of a nuclear radiation detector whose performance directly affects the accuracy of nuclear radiation monitoring. The design of a neutron detector's electronics system is introduced here. Two sets of preamplifiers are designed, the amplitude-versus-frequency curves of the preamplifiers are compared using Multisim simulation software, and a better preamplifier is determined through the comparison. A similar approach is used in the design of main amplifier, the amplitude-versus-frequency curves of four operational amplifiers are simulated by Multisim, and the best ones are chosen. The discriminator and trigger are designed in the electronics after the main amplifier, which are used for signal screening and shaping. The neutron detector is tested by cosmic neutrons in environmental background, which is composed of the designed electronic system and a proportional counter tube. Experiments show that the electronics is suitable for neutron detector.