title: QXAFS system of the BL14W1 XAFS beamline at the Shanghai Synchrotron Radiation Facility.
abstract: The quick-scanning XAFS (QXAFS) method is achieved at the BL14W1 XAFS beamline at the Shanghai Synchrotron Radiation Facility based on the EPICS and LabVIEW systems. This is realised by the unprecedented use of LabVIEW's data logging and supervisory control module for communication with EPICS in synchrotron radiation facilities. A fine QXAFS spectrum with an energy range of 1.2 keV at the Cu K-edge has been collected in 2 s with stable beam position and the data quality is comparable with that of the step-mode XAFS spectrum. Analog-to-digital converter and double-crystal monochromator set-ups have been optimized in order to acquire optimal parameters for the QXAFS experiments. Signal-to-noise ratios of these spectra have been calculated in order to estimate the importance of these parameters.
authors.affiliation: Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Zhang Pu Dong District, Shanghai 201204, People's Republic of China.
authors.forename: Heng
authors.initials: H
authors.lastname: Liu
authors.forename: Yongnian
authors.initials: Y
authors.lastname: Zhou
authors.forename: Zheng
authors.initials: Z
authors.lastname: Jiang
authors.forename: Songqi
authors.initials: S
authors.lastname: Gu
authors.forename: Xiangjun
authors.initials: X
authors.lastname: Wei
authors.forename: Yuying
authors.initials: Y
authors.lastname: Huang
authors.forename: Yang
authors.initials: Y
authors.lastname: Zou
authors.forename: Hongjie
authors.initials: H
authors.lastname: Xu