Express analytical methods of time response characteristics in large dynamic range for scintillator

Abstract

BackgroundInternational basic nuclear physics research and fusion energy research need pulse radiation detection system with higher and higher accuracy. A pulse scintillator radiation detection system with large dynamic range is a key method to obtain detailed information such as the time and amplitude of small signals in a strong interference environment, so as to analyze and study the characteristics of these pulse radiation fields.PurposeIn order to meet the needs of covering design and optimization of the scintillator pulsed radiation detection system, a new express analysis method is proposed, which covers a large-scale dynamic range of time response characteristics.MethodsThis new express analytical unit mainly contains a gated photomultiplier tube (PMT), a gated high voltage (HV) and an oscilloscope. Firstly, a picosecond pulsed laser has been used to test the intrinsic property of this method. Finally, the time response characteristic of low-afterglow liquid scintillator has been studied by this method on a pulse X-ray machine. According to the experimental data, a decay curve of the liquid scintillator has been processing with double exponential fitting.ResultsThe decay curve of this liquid scintillator has been measured with a range of four scales.ConclusionsThis method has a vertical scope covering five scales.

Keywords

• time response
• dynamic range
• scintillation detector