Abstract
In X-ray absorption fine structure (XAFS) experiments, Soller slits are widely used as filter devices in order to improve the signal to noise ratio. Performing high accuracy manual focusing operations is a time-consuming process; therefore, this work introduces an automatic focusing method for Soller slits in multi-element fluorescence detectors. This method establishes a relation model between the fluorescence intensity distribution and the coordinates of the fluorescence excitation point. According to this relation model, the actual coordinates of the fluorescence excitation point can be deduced from the detected fluorescence intensity distribution and used in focusing operations. This method has proven to be feasible in an XAFS experiment at the BL14W1 beamline of the Shanghai Synchrotron Radiation Facility.
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References
M. Newville, Fundamentals of XAFS. Rev. Mineral. Geochem. 78, 33–74 (2014). doi:10.2138/rmg.2014.78.2
J.J. Tse, G.N. George, I.J. Pickering, Use of Soller slits to remove reference foil fluorescence from transmission spectra. J. Synchrotron Radiat. 18, 527–529 (2011). doi:10.1107/S090904951100344X
E.A. Stern, S.M. Heald, X-ray filter assembly for fluorescence measurements of X-ray absorption fine structure. Rev. Sci. Instrum. 12, 1579–11582 (1979). doi:10.1063/1.1135763
F.W. Lytle, D.E. Sayers, E.A. Stern, Extended X-ray-absorption fine-structure technique. II. Experimental practice and selected results. Phys. Rev. B 11, 4825–4835 (1975). doi:10.1103/PhysRevB.11.4825
E.A. Stern, D.E. Sayers, F.W. Lytle, Extended X-ray-absorption fine-structure technique. III. Determination of physical parameters. Phys. Rev. B 11, 4836–4846 (1975). doi:10.1103/PhysRevB.11.4836
W. Soller, A new precision X-ray spectrometer. Phys. Rev. 24, 158–167 (1924). doi:10.1103/PhysRev.24.158
CANBERRA Industries Inc. Germanium Array Detectors. http://www.canberra.com/products/detectors/germanium-detectors.asp
H.S. Yu, X.J. Wei, J. Li et al., The XAFS beamline of SSRF. Nucl. Sci. Technol. 26, 050102 (2015). doi:10.13538/j.1001-8042/nst.26.050102
B. Bewer, Soller slit design and characteristics. J. Synchrotron Radiat. 19, 185–190 (2012). doi:10.1107/S0909049511052319
W.C. Stoecker, J.W. Starbuck, Effect of Soller slits on X-ray intensity in a modern diffractometer. Rev. Sci. Instrum. 36, 1593–1598 (1965). doi:10.1063/1.1719399
T.N. White, An inherent limitation of soller (multiple) slits. Rev. Sci. Instrum. 4, 590–592 (1933). doi:10.1063/1.1749007
Digital X-ray Processor User’s Manual (2008), http://www.xia.com/Manuals/XMAP_User_Manual.pdf. Accessed 19 Nov 2008
Handel API (2002), http://www.xia.com/Manuals/Handel_API_012902_branch2.PDF. Accessed June 2002
J. Jacky, EPICS-based control system for a radiation therapy machine. Paper presented at 14th International Conference on Accelerator & Large Experimental Physics Control Systems (ICALEPCS2013), San Francisco, USA, 6–11 Oct 2013
M. Rivers, SynApps: dxp (2015), http://cars.uchicago.edu/software/epics/dxp.html. Accessed 20 Jan 2015
D. Zimoch, StreamDevice home page (2014), http://epics.web.psi.ch/software/streamdevice/. Accessed 5 Feb 2014
About the MATLAB Runtime (2012), http://www.mathworks.com/help/compiler/about-the-matlab-runtime.html. Accessed March 2012
Polyfit (2010), http://www.mathworks.com/help/matlab/ref/polyfit.html. Accessed Sept 2010
Lsqcurvefit (2010), http://cn.mathworks.com/help/optim/ug/lsqcurvefit.html. Accessed Sept 2010
K. Kasemir, G. Carcassi, Control system studio guide (2015), http://cs-studio.sourceforge.net/docbook. Accessed 12 Oct 2015
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This work was supported by National Nature Science Foundation of China (No. 11175244).
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Yang, YY., Gao, Q., Gu, SQ. et al. Soller slits automatic focusing method for multi-element fluorescence detector. NUCL SCI TECH 27, 115 (2016). https://doi.org/10.1007/s41365-016-0105-7
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DOI: https://doi.org/10.1007/s41365-016-0105-7