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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