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  A multi-MHz single-shot data acquisition scheme with high dynamic range: pump–probe X-ray experiments at synchrotrons

Britz, A., Assefa, T. A., Galler, A., Gawelda, W., Diez, M., Zalden, P., et al. (2016). A multi-MHz single-shot data acquisition scheme with high dynamic range: pump–probe X-ray experiments at synchrotrons. Journal of Synchrotron Radiation, 23(6), 1409-1423. doi:10.1107/S1600577516012625.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-7DB1-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-7DB2-E
Genre: Journal Article

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2016
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© A.Britz et al.
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https://doi.org/10.1107/S1600577516012625 (Publisher version)
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 Creators:
Britz, Alexander1, 2, 3, Author              
Assefa, Tadesse A.2, Author
Galler, Andreas2, Author
Gawelda, Wojciech2, 4, Author
Diez, Michael2, 3, Author
Zalden, Peter2, 3, Author
Khakhulin, Dmitry2, 3, Author
Fernandes, Bruno2, Author
Gessler, Patrick2, Author
Namin, Hamed Sotoudi2, Author
Beckmann, Andreas2, Author
Harder, Manuel5, Author
Yavaşd, Hasan5, Author
Bressler, Christian2, 3, 6, Author
Affiliations:
1International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266714              
2European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany, ou_persistent22              
3The Hamburg Centre for Ultrafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany, ou_persistent22              
4Institute of Physics, Jan Kochanowski University, Świętokrzyska 15, Kielce 25-406, Poland, ou_persistent22              
5Deutsches Elektronen-Synchrotron (PETRA III), Notkestraße 85, 22607 Hamburg, Germany, ou_persistent22              
6Department of Physics, Technical University of Denmark, Fysikvej 307, Kongens Lyngby 2800, Denmark, ou_persistent22              

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Free keywords: time-resolved X-ray absorption spectroscopy; data acquisition instrumentation; ultrafast detection; multi-photon counting.
 Abstract: The technical implementation of a multi-MHz data acquisition scheme for laser–X-ray pump–probe experiments with pulse limited temporal resolution (100 ps) is presented. Such techniques are very attractive to benefit from the high-repetition rates of X-ray pulses delivered from advanced synchrotron radiation sources. Exploiting a synchronized 3.9 MHz laser excitation source, experiments in 60-bunch mode (7.8 MHz) at beamline P01 of the PETRA III storage ring are performed. Hereby molecular systems in liquid solutions are excited by the pulsed laser source and the total X-ray fluorescence yield (TFY) from the sample is recorded using silicon avalanche photodiode detectors (APDs). The subsequent digitizer card samples the APD signal traces in 0.5 ns steps with 12-bit resolution. These traces are then processed to deliver an integrated value for each recorded single X-ray pulse intensity and sorted into bins according to whether the laser excited the sample or not. For each subgroup the recorded single-shot values are averaged over ∼107 pulses to deliver a mean TFY value with its standard error for each data point, e.g. at a given X-ray probe energy. The sensitivity reaches down to the shot-noise limit, and signal-to-noise ratios approaching 1000 are achievable in only a few seconds collection time per data point. The dynamic range covers 100 photons pulse−1 and is only technically limited by the utilized APD.

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Language(s): eng - English
 Dates: 2016-03-242016-08-042016-10-10
 Publication Status: Published online
 Pages: 16
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1107/S1600577516012625
 Degree: -

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Title: Journal of Synchrotron Radiation
  Abbreviation : J. Synchrotron Radiat.
Source Genre: Journal
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Publ. Info: Copenhagen, Denmark : Published for the International Union of Crystallography by Munksgaard
Pages: - Volume / Issue: 23 (6) Sequence Number: - Start / End Page: 1409 - 1423 Identifier: ISSN: 0909-0495
ISSN: 1600-5775
CoNE: /journals/resource/954925562624