Measurement of integral diffraction coefficients of crystals on beamline 4B7 of Beijing Synchrotron Radiation Facility |
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| Authors: | Yang Jia-Min Gan Xin-Shi Zhao Yang Cui Ming-Qi Zhu Tuo Zhao Yi-Dong Sun Li-Juan Zheng Lei Yan Fen Hu Zhi-Min Wei Min-Xi Zhang Ji-Yan and Yi Rong-Qing |
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| Affiliation: | Research Center of Laser Fusion, Chinese Academy of Engineering Physics, Mianyang 621900, China; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Integral diffraction coefficients of the crystal are the essential data of a crystal spectrometer which is extensively used to measure quantitative x-ray spectra of high temperature plasmas in kilo-electron-volt region. An experimental method has been developed to measure the integral diffraction coefficients of crystals on beamline 4B7 of Beijing Synchrotron Radiation Facility. The integral diffraction coefficients of several crystals including polyethylene terephthalate (PET), thallium acid phthalate (TlAP) and rubidium acid phthalate (RAP) crystals have been measured in the x-ray energy range 2100--5600 eV and compared with the calculations of the 'Darwin Prins' and the 'Mosaic' models. It is shown that the integral diffraction coefficients of these crystals are between the calculations of the 'Darwin Prins' and the 'Mosaic' models, but more close to the `Darwin Prins' model calculations. |
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| Keywords: | integral diffraction coefficient crystal x-ray spectrum measurement high temperature plasmas |
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