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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 22 — Oct. 24, 2011
  • pp: 21698–21706

Second-order autocorrelation of XUV FEL pulses via time resolved two-photon single ionization of He

R. Moshammer, Th. Pfeifer, A. Rudenko, Y. H. Jiang, L. Foucar, M. Kurka, K. U. Kühnel, C. D. Schröter, J. Ullrich, O. Herrwerth, M. F. Kling, X.-J. Liu, K. Motomura, H. Fukuzawa, A. Yamada, K. Ueda, K. L. Ishikawa, K. Nagaya, H. Iwayama, A. Sugishima, Y. Mizoguchi, S. Yase, M. Yao, N. Saito, A. Belkacem, M. Nagasono, A. Higashiya, M. Yabashi, T. Ishikawa, H. Ohashi, H. Kimura, and T. Togashi  »View Author Affiliations


Optics Express, Vol. 19, Issue 22, pp. 21698-21706 (2011)
http://dx.doi.org/10.1364/OE.19.021698


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Abstract

Second-order autocorrelation spectra of XUV free-electron laser pulses from the Spring-8 Compact SASE Source (SCSS) have been recorded by time and momentum resolved detection of two-photon single ionization of He at 20.45 eV using a split-mirror delay-stage in combination with high-resolution recoil-ion momentum spectroscopy (COLTRIMS). From the autocorrelation trace we extract a coherence time of 8 ± 2 fs and a mean pulse duration of 28 ± 5 fs, much shorter than estimations based on electron bunch-length measurements. Simulations within the partial coherence model [Opt. Lett. 35, 3441 (2010)] are in agreement with experiment if a pulse-front tilt across the FEL beam diameter is taken into account that leads to a temporal shift of about 6 fs between both pulse replicas.

© 2011 OSA

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(140.2600) Lasers and laser optics : Free-electron lasers (FELs)
(340.7450) X-ray optics : X-ray interferometry
(340.7480) X-ray optics : X-rays, soft x-rays, extreme ultraviolet (EUV)

ToC Category:
X-ray Optics

History
Original Manuscript: August 11, 2011
Revised Manuscript: September 14, 2011
Manuscript Accepted: September 15, 2011
Published: October 19, 2011

Citation
R. Moshammer, Th. Pfeifer, A. Rudenko, Y. H. Jiang, L. Foucar, M. Kurka, K. U. Kühnel, C. D. Schröter, J. Ullrich, O. Herrwerth, M. F. Kling, X.-J. Liu, K. Motomura, H. Fukuzawa, A. Yamada, K. Ueda, K. L. Ishikawa, K. Nagaya, H. Iwayama, A. Sugishima, Y. Mizoguchi, S. Yase, M. Yao, N. Saito, A. Belkacem, M. Nagasono, A. Higashiya, M. Yabashi, T. Ishikawa, H. Ohashi, H. Kimura, and T. Togashi, "Second-order autocorrelation of XUV FEL pulses via time resolved two-photon single ionization of He," Opt. Express 19, 21698-21706 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-22-21698


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References

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