| 2 | Study of transmission grating diffraction efficiencies for soft X-ray显示文摘Tansmission grating spectrometers are extensively used to measure absthlute X-ray spectra in a photon-energy range below 1000 eV. The transmission grating,as its dispersive element, must be calibrated to obtain its danaction efficiencies. Calibrations of absolute distraction efficiencies of the tlansmission grating at photon energyof 844eV have been carried out on Beliing Synchrotron mediation Facility. With theaid of grating model, all of the grating structure paraxneters have been determinedand the absolute dchaction efficiencies in a photon-energy range below 2000eV havealso been calculated and discussed. | YANG Jiamin DING Yaonan ZHENG Zhijian YI Rongqing SUN Kexu CUI Mingqi CUl Congwu ZHU Peiping CHEN Zhenlin LI Chaoguang WANG Yaomei (Insfifule of Nuclear Physics and Chetnisfry, CAEP, Chengdu 610003*Beijing institute of High Energy Physics, the Ch | 1999 | Nuclear Science and Techniques1999，10，2： | 0 |
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