北京同步辐射装置软X光束线通量谱的绝对测量与计算

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

在北京同步辐射装置（ＢＳＲＦ）上用全吸收平行板充氙电离室作一级标准探测器，对硅光电二极管（ＡＸＵＶ—１００）的效率在光子能量５—６．５ｋｅＶ进行了标定，建立了二级标准探测器；ＡＸＵＶ—１００硅光电二极管在５０ｅＶ－６ｋｅＶ有很好的线性响应，将其在硬Ｘ射线波段已标定的效率曲线外推到软Ｘ射线波段，并对ＢＳＲＦ３Ｂ１Ａ和４Ｂ９Ｂ光束线在软Ｘ射线波段光子通量谱进行了初步地测量，测量结果与理论计算结果较为符合．在３Ｂ１Ａ软Ｘ光学实验站，利用二级标准探测器对用于惯性约束聚变（ＩＣＦ）的软Ｘ光探测器的灵敏度进行了标定，并取得了满意的结果．

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.