Design And Realization Of Signal System Of The EUV Imager

The resonantly-scattered emission of He+, in plasma of the earth, forms the extreme ultraviolet. Because the resonantly-scattered emission of He+ at 30.4nm satisfies the assumption of optically thin, its intensity images the integrated column density of He+. The method of imaging the resonantly-scattered emission of He+ at 30.4nm is the main technique to research the occurring mechanism and physical models of the earth's magnetic storm. And it is the main approach to accurately forecast the geomagnetic storm, to do research on the earth space environment, to forecast the space weather and to forecast the natural disaster. The Extreme Ultraviolet Imager (EUVI) is designed to study the distribution of cold plasma in Earth's plasmasphere by imaging the distribution of the He+ ion through its emission at 30.4 nm.The EUV imager uses the technique of Single photon imaging. It can get the image by calculating the coordinates of the single photon, catched by detectors, and accumulate these coordinates for a cycle. Signal processing part is crucial of the EUV imager. Its main task is collecting, analyzing and processing the signals from detectors. The hardware of signal processing system is based on DSP, aimed at real time processing, and it can work well with the help of software.In the thesis, firstly we described the working principle of the EUV imager, analyzed the process of imaging and introduced the constitutes of the imager system. Then we mainly introduce the design progress of the signal processing system of the EUV imager, including the hardware designing, chips selecting, PCB designing and so on. Also we described the design of software of the signal process system, including the introduction of the program language, the method of programming and so on. At last we validated the feasibility and correctness of designing principle of the EUV imager by lab simulation experiment.