Open AccessApplication of a pnCCD in X‐ray diffraction: a three‐dimensional X‐ray detector
Author(s) -
Leitenberger Wolfram,
Hartmann Robert,
Pietsch Ullrich,
Andritschke Robert,
Starke Ines,
Strüder Lothar
Publication year - 2008
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049508018931
Subject(s) - detector , optics , monochromatic color , physics , x ray detector , photon , synchrotron radiation , diffraction , scattering , bragg's law , reciprocal lattice , resolution (logic) , reflection (computer programming) , synchrotron , x ray , computer science , artificial intelligence , programming language
The first application of a pnCCD detector for X‐ray scattering experiments using white synchrotron radiation at BESSY II is presented. A Cd arachidate multilayer was investigated in reflection geometry within the energy range 7 keV < E < 35 keV. At fixed angle of incidence the two‐dimensional diffraction pattern containing several multilayer Bragg peaks and respective diffuse‐resonant Bragg sheets were observed. Since every pixel of the detector is able to determine the energy of every incoming photon with a resolution Δ E / E ≃ 10 −2 , a three‐dimensional dataset is finally obtained. In order to achieve this energy resolution the detector was operated in the so‐called single‐photon‐counting mode. A full dataset was evaluated taking into account all photons recorded within 10 5 detector frames at a readout rate of 200 Hz. By representing the data in reciprocal‐space coordinates, it becomes obvious that this experiment with the pnCCD detector provides the same information as that obtained by combining a large number of monochromatic scattering experiments using conventional area detectors.