Synchrotron radiation with the characteristic of high brilliance, high level of polarization, high collimation, low emittance and wide tunability in energy has been used as a standard source in metrology(1, 2). For a decade, lots of calibration work have been done on 4B7A in Beijing Synchrotron Radiation Facility (BSRF) (3, 4). For the calibration process, a high-precision online monitor is indispensable. To control the uncertainty under 0.1%, we studied different sizes parallel ion chambers with rare-gas and used different collecting methods to monitor the x-ray intensity of the beamline. Two methods to collect the signal of the ion chambers: reading the current directly with electrometer or signal amplification to collect the counts were compared.
@article{arxiv.1512.09197,
title = {Devices for high precision x-ray beam intensity monitoring on BSRF},
author = {LI Hua-Peng and Kun Tang and Yi-Dong Zhao and Lei Zheng and Shu-Hu Liu and Xiao-Liang Zhao and Ya-Shuai Zhao},
journal= {arXiv preprint arXiv:1512.09197},
year = {2019}
}