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Absolute Measurement and Calculation of Flux Spectra From the Soft X-Ray Beamline of Beijing Synchrotron Radiation Facility

Cui Mingqi;Li Gang;Cui Congwu;Tang Esheng(Institute of High Energy Physics,The Chinese Academy of Sciences,Beijing 100039)Yi Rongqing;Sun Kexu(Institute of Nuclear Physics and Chemistry,The Chinese Academy ofEngineering Physics,Chengdu 610003)  
In the spectral range from 5keV to 6.5keV,absolute calibration of the quantum efficiency of the AXUV-100 silicon photodiodes(as the transfer standard detector)has been derived from the filled Xe total absorbing ionization chamber used as absolute detector at Beamline 4W1B of BSRF.The calibrated efficiency of the AXUV-100 silicon photodiodes is spread to soft X-ray range as the efficiency of the AXUV-100 has a fine linearity from 50eV-6keV.The flux spectrum from Beamline 3B1A and 4B9B has been absolutely measured by the AXUV-100.The sensitivities of some soft X-ray detectors for inertial confinement fusion have been measured with the second standard silicon photodiode (AXUV-100).The measured results of XRD(A1 cathode)are correspondent with ones of LLNL in error range.
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