20 May 2011 Large format imaging detectors for x-ray free-electron-lasers
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Abstract
New generation synchrotron light sources, the X-ray free electron lasers, require a two dimensional focal plane instrumentation to perform X-ray imaging from below 100eV up to 25keV. The instruments have to face the accelerator bunch structure and energy bandwidth which is different for existing (FLASH, Hamburg and LCLS, Menlo Park) and future photon sources (SACLA, Harima and XFEL, Hamburg). Within the frame of the Center for Free Electron Laser Science (CFEL), a joint effort of the Max-Planck Society, DESY and the University of Hamburg, the MPI semiconductor laboratory developed, produced and operated large area X-ray CCD detectors with a format of nearly 60cm2 image area. They show outstanding characteristics: a high readout speed due to a complete parallel signal processing, high and homogeneous quantum efficiency, low signal noise, radiation hardness and a high pixel charge handling capacitance. We will present measurement results which demonstrate the X-ray spectroscopic and imaging capabilities of the fabricated devices. We will also report on the concept and the anticipated properties of the full, large scale system. The implementation of the detector into an experimental chamber to perform measurements e.g. of macromolecules in order to determine their structure at atomic resolutions will be shown.
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Robert Hartmann, Sascha Epp, Hubert Gorke, Andreas Hartmann, Günther Hauser, Sven Herrmann, Peter Holl, Nils Kimmel, Norbert Meidinger, Christian Reich, Daniel Rolles, Heike Soltau, Lothar Strüder, Joachim Ullrich, Georg Weidenspointner, "Large format imaging detectors for x-ray free-electron-lasers", Proc. SPIE 8078, Advances in X-ray Free-Electron Lasers: Radiation Schemes, X-ray Optics, and Instrumentation, 80780W (20 May 2011); doi: 10.1117/12.887034; https://doi.org/10.1117/12.887034
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