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Spectroscopic characterization of vacuum ultraviolet free electron laser pulses

Düsterer, S. and Radcliffe, P. and Geloni, G. and Jastrow, U. and Kuhlmann, M. and Plönjes, E. and Tiedtke, K. and Treusch, R. and Feldhaus, J. and Nicolosi, P. and Poletto, L. and Yeates, Patrick and Luna, H. and Costello, John T. and Orr, P. and Cubaynes, D. and Meyer, M. (2006) Spectroscopic characterization of vacuum ultraviolet free electron laser pulses. Optics Letters, 31 (11). pp. 1750-1752. ISSN 0146-9592

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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.

Item Type:Article (Published)
Refereed:Yes
Uncontrolled Keywords:free-electron lasers (FELs); lasers and laser optics; atomic spectroscopy;
Subjects:Physical Sciences > Lasers
DCU Faculties and Centres:Research Initiatives and Centres > National Centre for Plasma Science and Technology (NCPST)
DCU Faculties and Schools > Faculty of Science and Health > School of Physical Sciences
Publisher:Optical Society of America
Official URL:http://dx.doi.org/10.1364/OL.31.001750
Copyright Information:© 2006 Optical Society of America. This paper was published in Opt. Lett. 31, 1750-1752 (2006) and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/abstract.cfm?URI=ol-31-11-1750 Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Funders:Higher Education Authority
ID Code:15654
Deposited On:12 Aug 2010 10:11 by DORAS Administrator. Last Modified 12 Aug 2010 10:11

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