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| Calibration of Synchrotron Radiation X-ray Energy from 6keV to 70keV |
| HUANG Lin-ru1,YAO Xin-bo1,WANG Ji2,CHEN Can1,GUO Si-ming2,GUO Xiao-wei1,WANG Kai1,SHOU Xia1 |
1. Zhejiang Province Institution of Metrology, Hangzhou, Zhejiang 310018, China
2. National Institute of Metrology, Beijing 100029, China |
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Abstract In order to establish relevant national standards in the field of synchrotron radiation X-ray measurement with high fluence rate, the calibration method of synchrotron radiation X-ray energy was studied.Three energy points of 6, 10 and 20keV were selected on the Beijing Synchrotron Radiation Facility for experiments, and the relationship curve between the calibration factor of the transfer standard detector and the radiant energy was approximated to a straight line, and the change trend showed a linear decrease. The calibration experiment at 20keV energy point and different diameter aperture conditions verified that the calibration factor of the transfer detector is related to the photon flux when the light source irradiates to the reference ionization chamber and the transfer detector. 10～70keV energy calibration experiment was conducted on Shanghai Synchrotron Radiation Facility, the fitting curve of transfer standard detectors calibration factor was obtained. The change trend of the energy in 10～20keV is consistent with the change trend of the calibration factor obtained in the Beijing synchrotron radiation device. The calibration factor of the 30～70keV energy segment increases steadily and slowly with the increase of energy. The class A uncertainties of the calibration expriment of each energy point were evaluated, which provided technical data for subsequent establishment of the national measurement standard synchrotron radiation X-ray air specific release kinetic energy value transmission system.
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Received: 16 July 2020
Published: 14 November 2022
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2022, Vol. 43 
