Ion Blocking Properties Test And Factors Research Of Anti-ion Feedback Film

Anti-ion feedback membrane is a layer covering the surface of the microchannel plate input Al2O3or SiO2film, Because the barrier to ionize the gas molecules and ions generated by the feedback, the life of three generations of night vision device can obtain significantly improved.Testing anti-membrane ion feedback process requires a test system capable of weak ion vacuo to detect ion counting function to achieve.This article is designed to test the system against the membrane ion feedback can detect vacuum ion flow, and get feedback anti ion plasma membrane barrier properties. The system uses the single-channel electron multiplier (CEM) as the ion detector, through the study of the characteristics of the CEM, carried out two core tasks:Analysis and Simulation of the electric field component of the work test, which can optimize the structure of the test components; pulse height analysis of the signals of the test results, which can result in the test signal and noise isolation, improve system performance and test accuracy.Analysis and simulation system of the electric field using finite element analysis method using Ansoft Maxwell finite element simulation software. Analysis of test results by the multi-channel pulse-height analyzer pulse amplitude is achieved using automatic Finally accurate count scaler achieved ions.In the last article analyzes the influencing factors in the system, the relative improvement measures proposed. And analyze the test results obtained. Anti-ion plasma membrane barrier properties of this article feedback system to achieve the purpose of testing the three generations of night vision devices for use in the detection of ions generated in the feedback.