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Fast X-ray powder diffraction on I11 at Diamond

DOI: 10.1107/S0909049511013641 DOI Help
PMID: 21685682 PMID Help

Authors: S. P. Thompson (Diamond Light Source) , J. E. Parker (Diamond Light Source) , J. Marchal (Diamond Light Source) , J. Potter (Diamond Light Source) , A. Birt (Diamond Light Source) , F. Yuan (Diamond Light Source) , R. D. Fearn (Diamond Light Source) , A. R. Lennie (Diamond Light Source) , Steven R. Street (University of Birmingham) , C. C. Tang (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Synchrotron Radiation , VOL 18 (4) , PAGES 637-648

State: Published (Approved)
Published: May 2011

Abstract: The commissioning and performance characterization of a position-sensitive detector designed for fast X-ray powder diffraction experiments on beamline I11 at Diamond Light Source are described. The detecting elements comprise 18 detector-readout modules of MYTHEN-II silicon strip technology tiled to provide 90° coverage in 2[theta]. The modules are located in a rigid housing custom designed at Diamond with control of the device fully integrated into the beamline data acquisition environment. The detector is mounted on the I11 three-circle powder diffractometer to provide an intrinsic resolution of [Delta]2[theta] [asymptotically equal to] 0.004°. The results of commissioning and performance measurements using reference samples (Si and AgI) are presented, along with new results from scientific experiments selected to demonstrate the suitability of this facility for powder diffraction experiments where conventional angle scanning is too slow to capture rapid structural changes. The real-time dehydrogenation of MgH2, a potential hydrogen storage compound, is investigated along with ultrafast high-throughput measurements to determine the crystallite quality of different samples of the metastable carbonate phase vaterite (CaCO3) precipitated and stabilized in the presence of amino acid molecules in a biomimetic synthesis process.

Journal Keywords: In Situ Synchrotron Powder Diffraction; Fast Position-Sensitive Detector

Subject Areas: Technique Development

Instruments: I11-High Resolution Powder Diffraction