skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Coherence Properties of Individual Femtosecond Pulses of an X-ray Free-Electron Laser

Abstract

Measurements of the spatial and temporal coherence of single, femtosecond x-ray pulses generated by the first hard x-ray free-electron laser, the Linac Coherent Light Source, are presented. Single-shot measurements were performed at 780 eV x-ray photon energy using apertures containing double pinholes in 'diffract-and-destroy' mode. We determined a coherence length of 17 {micro}m in the vertical direction, which is approximately the size of the focused Linac Coherent Light Source beam in the same direction. The analysis of the diffraction patterns produced by the pinholes with the largest separation yields an estimate of the temporal coherence time of 0.55 fs. We find that the total degree of transverse coherence is 56% and that the x-ray pulses are adequately described by two transverse coherent modes in each direction. This leads us to the conclusion that 78% of the total power is contained in the dominant mode.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; « less
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1042676
Report Number(s):
SLAC-PUB-14988
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US1202805
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 107; Journal Issue: 14; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; APERTURES; COHERENCE LENGTH; DIFFRACTION; FREE ELECTRON LASERS; LIGHT SOURCES; LINEAR ACCELERATORS; PHOTONS; Instrumentation,INST, PHYS

Citation Formats

Vartanyants, I.A., /DESY /Moscow Phys. Eng. Inst., Singer, A., Mancuso, A.P., Yefanov, O.M., /DESY, Sakdinawat, A., Liu, Y., Bang, E., /UC, Berkeley, Williams, G.J., /SLAC, Cadenazzi, G., Abbey, B., /Melbourne U., Sinn, H., /European XFEL, Hamburg, Attwood, D., /UC, Berkeley, Nugent, K.A., /Melbourne U., Weckert, E., /DESY, Wang, T., Zhu, D., Wu, B., Graves, C., Scherz, A., Turner, J.J., Schlotter, W.F., and /SLAC /LERMA, Ivry /Zurich, ETH /LBL, Berkeley /ANL, APS /Argonne /SLAC /LLNL, Livermore /Latrobe U. /SLAC /SLAC /European XFEL, Hamburg /SLAC /Hamburg U. Coherence Properties of Individual Femtosecond Pulses of an X-ray Free-Electron Laser. United States: N. p., 2012. Web.
Vartanyants, I.A., /DESY /Moscow Phys. Eng. Inst., Singer, A., Mancuso, A.P., Yefanov, O.M., /DESY, Sakdinawat, A., Liu, Y., Bang, E., /UC, Berkeley, Williams, G.J., /SLAC, Cadenazzi, G., Abbey, B., /Melbourne U., Sinn, H., /European XFEL, Hamburg, Attwood, D., /UC, Berkeley, Nugent, K.A., /Melbourne U., Weckert, E., /DESY, Wang, T., Zhu, D., Wu, B., Graves, C., Scherz, A., Turner, J.J., Schlotter, W.F., & /SLAC /LERMA, Ivry /Zurich, ETH /LBL, Berkeley /ANL, APS /Argonne /SLAC /LLNL, Livermore /Latrobe U. /SLAC /SLAC /European XFEL, Hamburg /SLAC /Hamburg U. Coherence Properties of Individual Femtosecond Pulses of an X-ray Free-Electron Laser. United States.
Vartanyants, I.A., /DESY /Moscow Phys. Eng. Inst., Singer, A., Mancuso, A.P., Yefanov, O.M., /DESY, Sakdinawat, A., Liu, Y., Bang, E., /UC, Berkeley, Williams, G.J., /SLAC, Cadenazzi, G., Abbey, B., /Melbourne U., Sinn, H., /European XFEL, Hamburg, Attwood, D., /UC, Berkeley, Nugent, K.A., /Melbourne U., Weckert, E., /DESY, Wang, T., Zhu, D., Wu, B., Graves, C., Scherz, A., Turner, J.J., Schlotter, W.F., and /SLAC /LERMA, Ivry /Zurich, ETH /LBL, Berkeley /ANL, APS /Argonne /SLAC /LLNL, Livermore /Latrobe U. /SLAC /SLAC /European XFEL, Hamburg /SLAC /Hamburg U. Wed . "Coherence Properties of Individual Femtosecond Pulses of an X-ray Free-Electron Laser". United States. https://www.osti.gov/servlets/purl/1042676.
@article{osti_1042676,
title = {Coherence Properties of Individual Femtosecond Pulses of an X-ray Free-Electron Laser},
author = {Vartanyants, I.A. and /DESY /Moscow Phys. Eng. Inst. and Singer, A. and Mancuso, A.P. and Yefanov, O.M. and /DESY and Sakdinawat, A. and Liu, Y. and Bang, E. and /UC, Berkeley and Williams, G.J. and /SLAC and Cadenazzi, G. and Abbey, B. and /Melbourne U. and Sinn, H. and /European XFEL, Hamburg and Attwood, D. and /UC, Berkeley and Nugent, K.A. and /Melbourne U. and Weckert, E. and /DESY and Wang, T. and Zhu, D. and Wu, B. and Graves, C. and Scherz, A. and Turner, J.J. and Schlotter, W.F. and /SLAC /LERMA, Ivry /Zurich, ETH /LBL, Berkeley /ANL, APS /Argonne /SLAC /LLNL, Livermore /Latrobe U. /SLAC /SLAC /European XFEL, Hamburg /SLAC /Hamburg U.},
abstractNote = {Measurements of the spatial and temporal coherence of single, femtosecond x-ray pulses generated by the first hard x-ray free-electron laser, the Linac Coherent Light Source, are presented. Single-shot measurements were performed at 780 eV x-ray photon energy using apertures containing double pinholes in 'diffract-and-destroy' mode. We determined a coherence length of 17 {micro}m in the vertical direction, which is approximately the size of the focused Linac Coherent Light Source beam in the same direction. The analysis of the diffraction patterns produced by the pinholes with the largest separation yields an estimate of the temporal coherence time of 0.55 fs. We find that the total degree of transverse coherence is 56% and that the x-ray pulses are adequately described by two transverse coherent modes in each direction. This leads us to the conclusion that 78% of the total power is contained in the dominant mode.},
doi = {},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 14,
volume = 107,
place = {United States},
year = {2012},
month = {6}
}