Testing Method and Analysis of Far Ultraviolet Photon Counting Imaging Detector

In order to realize imaging detection requirements of the far ultraviolet (FUV) band (140-180 nm) radiation of N-2 LBH in the auroral spectrum, we used the far ultraviolet photon counting imaging detector to detect it. The detector is mainly composed of CsI photocathode, V stack microchannel plates, induction type wedge and strip anode. First, the calibration device of FUV radiation is constructed, which is mainly composed of vacuum tank, vacuum displacement platform, standard transfer detector, FUV grazing incidence monochromator, vacuum ultraviolet light source, inspection equipment of signal processing, etc. Then, the quantum efficiency, resolution, dark noise, limit count rate, and other main performances of the detector arc tested in detail. Finally, test data obtained arc analyzed. Test results indicate that the maximum quantum efficiency of the detector at the working waveband is 12.9%, spatial resolution is 88.3 mu m, dark count rate is 0.87 counts/(s.cm(2)), and the effective test range of the count rate of the detector system is 0-350000 counts/s. The technical specifications of the developed detector meet the requirements of radiation imaging for N-2 LHH in the auroral spectrum.