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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 11 — Jun. 1, 2006
  • pp: 1750–1752

Spectroscopic characterization of vacuum ultraviolet free electron laser pulses

S. Düsterer, P. Radcliffe, G. Geloni, U. Jastrow, M. Kuhlmann, E. Plönjes, K. Tiedtke, R. Treusch, J. Feldhaus, P. Nicolosi, L. Poletto, P. Yeates, H. Luna, J. T. Costello, P. Orr, D. Cubaynes, and M. Meyer  »View Author Affiliations


Optics Letters, Vol. 31, Issue 11, pp. 1750-1752 (2006)
http://dx.doi.org/10.1364/OL.31.001750


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Abstract

Because of the stochastic nature of self-amplified spontaneous emission (SASE), it is crucial to measure for single pulses the spectral characteristics of ultrashort pulses from the vacuum ultraviolet free electron laser (FLASH) at DESY, Germany. To meet this particular challenge, we have employed both photon and photoelectron spectroscopy. Each FEL pulse is composed of an intense and spectrally complex fundamental, centered at a photon energy of about 38.5 eV , with a bandwidth of 0.5% accompanied by higher harmonics, each carrying an intensity of typically 0.3 to 0.6% of that of the fundamental. The correlation between the harmonics and the fundamental is in remarkable agreement with a simple statistical model of SASE FEL radiation.

© 2006 Optical Society of America

OCIS Codes
(140.2600) Lasers and laser optics : Free-electron lasers (FELs)
(140.7240) Lasers and laser optics : UV, EUV, and X-ray lasers
(300.6210) Spectroscopy : Spectroscopy, atomic

ToC Category:
Spectroscopy

History
Original Manuscript: January 12, 2006
Revised Manuscript: February 21, 2006
Manuscript Accepted: March 15, 2006

Citation
S. Düsterer, P. Radcliffe, G. Geloni, U. Jastrow, M. Kuhlmann, E. Plönjes, K. Tiedtke, R. Treusch, J. Feldhaus, P. Nicolosi, L. Poletto, P. Yeates, H. Luna, J. T. Costello, P. Orr, D. Cubaynes, and M. Meyer, "Spectroscopic characterization of vacuum ultraviolet free electron laser pulses," Opt. Lett. 31, 1750-1752 (2006)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-31-11-1750


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References

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  14. The main causes of error are (i) the uncalibrated fluorescence yield of the Ce:YAG screen and (ii) the different angular distributions of the fundamental and the harmonics.
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