Research And Optimization Of Diamond Radiation Detector

Diamond has the advantages of wide band gap,long service life,strong radiation resistance,high temperature resistance,corrosion resistance,no refrigeration and so on.It has huge potential applications in high-energy particles,nuclear radiation detection and other fields.The independent research on diamond radiation detector is of great significance for the country in high radiation environment and highly sensitive monitoring such as accelerator beam monitoring and deep space exploration.1.This thesis mainly starts from the development of the diamond radiation detector,successfully develops the diamond micro-nano processing technology,prepares the diamond micro-nano structure with good particle sensitivity,and carries on the characterization analysis in the production process.2.A diamond film detector based on silicon was developed.Firstly,20 m diamond film was grown on 100 crystalline silicon substrate by MPCVD method,and the composition of diamond film was analyzed by Raman and XRD.Finally,silicon substrate diamond film was packaged as detector.The dark current level of diamond film detector on silicon substrate is of magnitude μA（-0.5 V/μm）.γ dose-rate measurement was carried out by using diamond film detector on silicon substrate under intense radiation environment.The photocurrent response of the detector at the dose-rate of 10 Gy/h～190 Gy/h was given,and the reference sensitivity of the detector at the dose-rate of 10 Gy/h was calculated.3.The single crystal diamond detector is successfully developed,which can be used forγ-ray dose-rate measurement and α-spectrum measurement.The single particle pulse response of the detector to α source is 1.6 ns and the energy resolution of the detector is 6.3%.The dark current level was reduced to-0.4～0.3 n A（electric field was-1～1 V/μm）.4.The characterization test,energy spectrum test and single particle pulse test system for diamond detector are built.The performance of the detector is tested and analyzed.