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Title: Single shot speckle and coherence analysis of the hard X-ray free electron laser LCLS

Abstract

The single shot based coherence properties of hard x-ray pulses from the Linac Coherent Light Source (LCLS) were measured by analyzing coherent diffraction patterns from nano-particles and gold nanopowder. The intensity histogram of the small angle x-ray scattering ring from nano-particles reveals the fully transversely coherent nature of the LCLS beam with a number of transverse mode $$\langle$$Ms$$\rangle$$ = 1.1. On the other hand, the speckle contrasts measured at a large wavevector yields information about the longitudinal coherence of the LCLS radiation after a silicon (111) monochromator. The quantitative agreement between our data and the simulation confirms a mean coherence time of 2.2 fs and a x-ray pulse duration of 29 fs. Lastly the observed reduction of the speckle contrast generated by x-rays with pulse duration longer than 30 fs indicates ultrafast dynamics taking place at an atomic length scale prior to the permanent sample damage.

Authors:
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [3];  [3];  [3];  [3];  [4];  [4];  [5];  [5];  [5];  [2];  [3]
  1. Korea Research Inst. of Standards and Science (KRISS), Daejeon (Korea); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Hasylab; SLAC National Accelerator Lab., Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)
  2. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Hasylab
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)
  4. Max Planck Inst. for Intelligent Systems, Stuttgart (Germany)
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Ministry of Science, ICT and Future Planning, Korea; German Research Foundation (DFG)
OSTI Identifier:
1396050
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 21; Journal Issue: 21; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Free-electron lasers; Spectroscopy; Speckle

Citation Formats

Lee, Sooheyong, Roseker, W., Gutt, C., Fischer, B., Conrad, H., Lehmkühler, F., Steinke, I., Zhu, D., Lemke, H., Cammarata, M., Fritz, D. M., Wochner, P., Castro-Colin, M., Hruszkewycz, S. O., Fuoss, P. H., Stephenson, G. B., Grübel, G., and Robert, A. Single shot speckle and coherence analysis of the hard X-ray free electron laser LCLS. United States: N. p., 2013. Web. doi:10.1364/OE.21.024647.
Lee, Sooheyong, Roseker, W., Gutt, C., Fischer, B., Conrad, H., Lehmkühler, F., Steinke, I., Zhu, D., Lemke, H., Cammarata, M., Fritz, D. M., Wochner, P., Castro-Colin, M., Hruszkewycz, S. O., Fuoss, P. H., Stephenson, G. B., Grübel, G., & Robert, A. Single shot speckle and coherence analysis of the hard X-ray free electron laser LCLS. United States. https://doi.org/10.1364/OE.21.024647
Lee, Sooheyong, Roseker, W., Gutt, C., Fischer, B., Conrad, H., Lehmkühler, F., Steinke, I., Zhu, D., Lemke, H., Cammarata, M., Fritz, D. M., Wochner, P., Castro-Colin, M., Hruszkewycz, S. O., Fuoss, P. H., Stephenson, G. B., Grübel, G., and Robert, A. Tue . "Single shot speckle and coherence analysis of the hard X-ray free electron laser LCLS". United States. https://doi.org/10.1364/OE.21.024647. https://www.osti.gov/servlets/purl/1396050.
@article{osti_1396050,
title = {Single shot speckle and coherence analysis of the hard X-ray free electron laser LCLS},
author = {Lee, Sooheyong and Roseker, W. and Gutt, C. and Fischer, B. and Conrad, H. and Lehmkühler, F. and Steinke, I. and Zhu, D. and Lemke, H. and Cammarata, M. and Fritz, D. M. and Wochner, P. and Castro-Colin, M. and Hruszkewycz, S. O. and Fuoss, P. H. and Stephenson, G. B. and Grübel, G. and Robert, A.},
abstractNote = {The single shot based coherence properties of hard x-ray pulses from the Linac Coherent Light Source (LCLS) were measured by analyzing coherent diffraction patterns from nano-particles and gold nanopowder. The intensity histogram of the small angle x-ray scattering ring from nano-particles reveals the fully transversely coherent nature of the LCLS beam with a number of transverse mode $\langle$Ms$\rangle$ = 1.1. On the other hand, the speckle contrasts measured at a large wavevector yields information about the longitudinal coherence of the LCLS radiation after a silicon (111) monochromator. The quantitative agreement between our data and the simulation confirms a mean coherence time of 2.2 fs and a x-ray pulse duration of 29 fs. Lastly the observed reduction of the speckle contrast generated by x-rays with pulse duration longer than 30 fs indicates ultrafast dynamics taking place at an atomic length scale prior to the permanent sample damage.},
doi = {10.1364/OE.21.024647},
journal = {Optics Express},
number = 21,
volume = 21,
place = {United States},
year = {Tue Oct 08 00:00:00 EDT 2013},
month = {Tue Oct 08 00:00:00 EDT 2013}
}

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