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Circular dichroism ...
Circular dichroism measurements at an x-ray free-electron laser with polarization control
- Article/chapterEnglish2016
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2016-08-31
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AIP Publishing,2016
Numbers
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LIBRIS-ID:oai:gup.ub.gu.se/244517
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https://gup.ub.gu.se/publication/244517URI
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https://doi.org/10.1063/1.4961470DOI
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
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A non-destructive diagnostic method for the characterization of circularly polarized, ultraintense, short wavelength free-electron laser (FEL) light is presented. The recently installed Delta undulator at the LCLS (Linac Coherent Light Source) at SLAC National Accelerator Laboratory (USA) was used as showcase for this diagnostic scheme. By applying a combined two-color, multi-photon experiment with polarization control, the degree of circular polarization of the Delta undulator has been determined. Towards this goal, an oriented electronic state in the continuum was created by non-resonant ionization of the O2 1s core shell with circularly polarized FEL pulses at hν 700 eV. An also circularly polarized, highly intense UV laser pulse with hν 3.1 eV was temporally and spatially overlapped, causing the photoelectrons to redistribute into so-called sidebands that are energetically separated by the photon energy of the UV laser. By determining the circular dichroism of these redistributed electrons using angle resolving electron spectroscopy and modeling the results with the strong-field approximation, this scheme allows to unambiguously determine the absolute degree of circular polarization of any pulsed, ultraintense XUV or X-ray laser source. © 2016 Author(s).
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Lindahl, Anton,1982Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)(Swepub:gu)xliant
(author)
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Knie, A.
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Hartmann, N.
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Lutman, A. A.
(author)
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MacArthur, J. P.
(author)
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Shevchuk, I.
(author)
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Buck, J.
(author)
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Galler, A.
(author)
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Glownia, J. M.
(author)
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Helml, W.
(author)
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Huang, Z.
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Kabachnik, N. M.
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Kazansky, A. K.
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Liu, J.
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Marinelli, A.
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Mazza, T.
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Nuhn, H. D.
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Walter, P.
(author)
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Viefhaus, J.
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Meyer, M.
(author)
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Moeller, S.
(author)
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Coffee, R. N.
(author)
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Ilchen, M.
(author)
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Göteborgs universitetInstitutionen för fysik (GU)
(creator_code:org_t)
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In:Review of Scientific Instruments: AIP Publishing87:80034-67481089-7623
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Hartmann, G.
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Lindahl, Anton, ...
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Knie, A.
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Hartmann, N.
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Lutman, A. A.
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MacArthur, J. P.
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show more...
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Shevchuk, I.
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Buck, J.
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Galler, A.
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Glownia, J. M.
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Helml, W.
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Huang, Z.
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Kabachnik, N. M.
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Kazansky, A. K.
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Liu, J.
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Marinelli, A.
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Mazza, T.
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Nuhn, H. D.
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Walter, P.
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Viefhaus, J.
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Meyer, M.
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Moeller, S.
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Coffee, R. N.
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Ilchen, M.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Accelerator Phys ...
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NATURAL SCIENCES
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and Physical Science ...
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Review of Scient ...
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University of Gothenburg