Transverse-Coherence Properties of the Free-Electron-Laser FLASH at DESY

Journal Article · Fri Dec 19 00:00:00 EST 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.101.254801· OSTI ID:21180031

Singer, A; Vartanyants, I A; Kuhlmann, M; Duesterer, S; Treusch, R; Feldhaus, J ^[1]

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1. HASYLAB at DESY, Notkestrasse 85, D-22607 Hamburg (Germany)

A general theoretical approach based on the decomposition of statistical fields into a sum of independently propagating transverse modes was used for the analysis of the coherence properties of the new free-electron laser source FLASH operated at 13.7 nm wavelength. The analysis shows that several transverse modes are contributing to the total radiation field of FLASH. The results of theoretical calculations are compared with measurements using Young's double-slit experiment. The coherence lengths in the horizontal and in the vertical directions 20 m downstream from the source are estimated at 300 and 250 {mu}m, respectively.

• OSTI ID: 21180031
• Journal Information: Physical Review Letters, Vol. 101, Issue 25; Other Information: DOI: 10.1103/PhysRevLett.101.254801; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COHERENCE LENGTH
DECOMPOSITION
DESY
FREE ELECTRON LASERS
WAVELENGTHS