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Instruments / Technical Area	Publication Details	Published
I20-Scanning-X-ray spectroscopy (XAS/XES)	Photon-in/photon-out spectroscopy at the I20-scanning beamline at Diamond Light Source Shusaku Hayama , Roberto Boada , Jesus Chaboy , Adrian Birt , Graham Duller , Leo Cahill , Adam Freeman , Monica Amboage , Luke Keenan , Sofia Diaz-Moreno Journal Of Physics: Condensed Matter DOI: 10.1088/1361-648X/abfe93 Open Access Show Abstract ▼ Abstract: A scanning multi-crystal x-ray emission spectrometer to perform photon-in/photon-out spectroscopy at the I20-Scanning beamline at Diamond Light Source is described. The instrument, equipped with three analyzer crystals, is based on a 1m Rowland circle spectrometer operating in the vertical plane. The energy resolution of the spectrometer is of the order of 1 eV, having sufficient resolving power to overcome the core-hole lifetime broadening of most of the transition metals K-edges. Examples showing the capabilily of the beamline for performing high energy resolution fluorescence detection x-ray absorption spectroscopy (HERFD-XAS), non-resonant x-ray emission spectroscopy (XES) and resonant x-ray emission spectroscopy (RXES) are presented. The comparison of the Zn and Mn K-edge HERFD-XANES of ZnO and MnO with ab-initio calculations shows that the technique provides enhanced validation of the models by making subtle spectral features more visible.	May 2021
I11-High Resolution Powder Diffraction	Fast X-ray powder diffraction on I11 at Diamond S. P. Thompson , J. E. Parker , J. Marchal , J. Potter , A. Birt , F. Yuan , R. D. Fearn , A. R. Lennie , Steven R. Street , C. C. Tang Journal Of Synchrotron Radiation 18 (4), 637-648 DOI: 10.1107/S0909049511013641 PMID: 21685682 Show Abstract ▼ 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.	May 2011
I11-High Resolution Powder Diffraction	Beamline I11 at Diamond: A new instrument for high resolution powder diffraction J. Potter , T. P. Hill , A. Birt , F. Yuan , J. Parker , Chiu C. Tang , S. P. Thompson , T. M. Cobb Review Of Scientific Instruments 80 (7) DOI: 10.1063/1.3167217 PMID: 19655981 Show Abstract ▼ Abstract: The performance characteristics of a new synchrotron x-ray powder diffraction beamline (I11) at the Diamond Light Source are presented. Using an in-vacuum undulator for photon production and deploying simple x-ray optics centered around a double-crystal monochromator and a pair of harmonic rejection mirrors, a high brightness and low bandpass x-ray beam is delivered at the sample. To provide fast data collection, 45 Si(111) analyzing crystals and detectors are installed onto a large and high precision diffractometer. High resolution powder diffraction data from standard reference materials of Si, alpha-quartz, and LaB(6) are used to characterize instrumental performance.	Jul 2009

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