SCINTILLATOR - PHOTODIODE LINEAR ARRAYS FOR X-RAY INSPECTION SYSTEM

摘要

The evaluations of the following performances of detectors for design of the radiographic system were carried out by mathematical simulation method and experimentally: sensitivity to absorbed energy, noise level, form of apparatus function for spatial resolution of detectors array.rnThe results of calculations were used for designing of CdWO_4-Si arrays with optimal sizes of scintillator and photodiode for resolution ability. At the given stage the quality of radiation detectors was evaluated by spectroscopic methods. At the bias voltage on photodiode 24 V, the sensitivity of detectors has made up (0,95-1,00) × 10~(-21) C / eV, noise level - (1,50-1,75) × 10~(-16) C together with electronic noise. Dynamic range at absorbed energy by separate detector is more than 10~5, what is sufficient to get required image contrast.