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  • 1.
    Ekholm, Victor
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Gråsjö, Johan
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmacy. Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics. Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
    Dong, Minjie
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Björneholm, Olle
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Såthe, Conny
    Uppsala University.
    Chatzigeorgiou, Evanthia
    Agåker, Marcus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Harada, Yoshihisa
    Miyawaki, Jun
    Rubensson, Jan-Erik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics. Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
    Aqueous carbonate and bicarbonate ions studied by RIXS at the O K-edgeManuscript (preprint) (Other academic)
  • 2.
    Liu, Lei
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Mineralogy Petrology and Tectonics.
    Huang, Shuo
    Vitos, Levente
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
    Dong, Minjie
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Bykova, Elena
    Zhang, Dongzhou
    Almqvist, Bjarne S.G.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics.
    Ivanov, Sergey
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Rubensson, Jan-Erik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Varga, Bela
    Varga, Lajos
    Lazor, Peter
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Mineralogy Petrology and Tectonics.
    Pressure-induced magnetovolume effect in CoCrFeAl high-entropy alloy2019In: Communications Physics, E-ISSN 2399-3650, Vol. 2, article id 42Article in journal (Refereed)
    Abstract [en]

    High-entropy alloys (HEAs) composed of multiple-principal elements with (nearly) equimolar ratio establish a new conceptual framework for alloy design and hold a promise for extensive applications in industry, akin to the controlled expansion alloys (CEAs), such as Invar alloys. Spontaneously, one question emerges - would it be possible to synthesize a novel class of alloys combining the virtues of both CEAs and HEAs? Here, we report the pressure-induced magnetovolume effect in the body-centered-cubic CoCrFeAl HEA coupled with magnetic phase transitions from ferromagnetic to paramagnetic, and to non-magnetic states, originating from the successive collapses of local magnetic moments of Co and Fe. The observed magnetovolume anomalies, occurring in a progressive way, tailor appreciably the coefficient of thermal expansion of CoCrFeAl. These results further strengthen HEAs’ anticipated potential for designing multifunctional materials in virtue of their multiple outstanding properties, and reveal possible routes for their future synthesis.

  • 3. Rudolf, Denis
    et al.
    Bussmann, Jan
    Odstrcil, Michal
    Dong, Minjie
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Bergmann, Klaus
    Danylyuk, Serhiy
    Juschkin, Larissa
    Interferometric broadband Fourier spectroscopy with a partially coherent gas-discharge extreme ultraviolet light source2015In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 40, no 12, p. 2818-2821Article in journal (Refereed)
    Abstract [en]

    Extreme ultraviolet (EUV) spectroscopy is a powerful tool for studying fundamental processes in plasmas as well as for spectral characterization of EUV light sources and EUV optics. However, a simultaneous measurement covering a broadband spectral range is difficult to realize. Here, we propose a method for interferometric broadband Fourier spectroscopy connecting soft x ray and visible spectral ranges with moderate spectral resolution. We present an analytical model to recover the spectrum from a double-slit interferogram. We apply our model for spectral characterization of a partially coherent gas-discharge EUV light source operated with different gases in the spectral range between 10 and 110 nm wavelengths. Our approach allows a simple and fast broadband spectroscopy with fully or partially spatially coherent light sources, for instance, to characterize out-of-band radiation in EUV lithography applications.

  • 4.
    Sanchez-Gonzalez, A.
    et al.
    Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England..
    Barillot, T. R.
    Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England..
    Squibb, R. J.
    Univ Gothenburg, Dept Phys, SE-41296 Gothenburg, Sweden..
    Kolorenc, P.
    Charles Univ Prague, Fac Math & Phys, Inst Theoret Phys, CR-18000 Prague, Czech Republic..
    Agåker, Marcus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Averbukh, V.
    Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England..
    Bearpark, M. J.
    Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England..
    Bostedt, C.
    SLAC Natl Accelerator Lab, LCLS, Menlo Pk, CA 94025 USA..
    Bozek, J. D.
    SOLEIL Synchrotron, PLEIADES Beamline, LOrme Merisiers, F-91192 Gif Sur Yvette, France..
    Bruce, S.
    Univ Texas, Texas Ctr High Energy Dens Sci CHEDS, Austin, TX 78712 USA..
    Montero, S. Carron
    SLAC Natl Accelerator Lab, LCLS, Menlo Pk, CA 94025 USA..
    Coffee, R. N.
    SLAC Natl Accelerator Lab, LCLS, Menlo Pk, CA 94025 USA..
    Cooper, B.
    Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England..
    Cryan, J. P.
    SLAC Natl Accelerator Lab, PULSE Inst, Menlo Pk, CA 94025 USA..
    Dong, Minjie
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Eland, J. H. D.
    Univ Oxford, Dept Chem, Oxford OX1 3QZ, England..
    Fang, L.
    Univ Texas, Texas Ctr High Energy Dens Sci CHEDS, Austin, TX 78712 USA..
    Fukuzawa, H.
    Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan..
    Guehr, M.
    SLAC Natl Accelerator Lab, PULSE Inst, Menlo Pk, CA 94025 USA..
    Ilchen, M.
    European XFEL GmbH, D-22761 Hamburg, Germany..
    Johnsson, A. S.
    Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England..
    Liekhus-S, C.
    SLAC Natl Accelerator Lab, PULSE Inst, Menlo Pk, CA 94025 USA.;Stanford Univ, Dept Phys, Stanford, CA 94305 USA.;Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA..
    Marinelli, A.
    SLAC Natl Accelerator Lab, LCLS, Menlo Pk, CA 94025 USA..
    Maxwell, T.
    SLAC Natl Accelerator Lab, LCLS, Menlo Pk, CA 94025 USA..
    Motomura, K.
    Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan..
    Mucke, Melanie
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Natan, A.
    SLAC Natl Accelerator Lab, PULSE Inst, Menlo Pk, CA 94025 USA.;Stanford Univ, Dept Phys, Stanford, CA 94305 USA.;Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA..
    Osipov, T.
    SLAC Natl Accelerator Lab, LCLS, Menlo Pk, CA 94025 USA..
    Östlin, Christofer
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Pernpointner, M.
    Heidelberg Univ, Theoret Chem, D-69120 Heidelberg, Germany..
    Petrovic, V. S.
    SLAC Natl Accelerator Lab, PULSE Inst, Menlo Pk, CA 94025 USA.;Stanford Univ, Dept Phys, Stanford, CA 94305 USA.;Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA..
    Robb, M. A.
    Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England..
    Sathe, C.
    Lund Univ, MAX IV Lab, SE-22100 Lund, Sweden..
    Simpson, E. R.
    Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England..
    Underwood, J. G.
    UCL, Dept Phys & Astron, London WC1E 6BT, England..
    Vacher, Morgane
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Theoretical Chemistry. Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England..
    Walke, D. J.
    Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England..
    Wolf, T. J. A.
    SLAC Natl Accelerator Lab, PULSE Inst, Menlo Pk, CA 94025 USA..
    Zhaunerchyk, V.
    Univ Gothenburg, Dept Phys, SE-41296 Gothenburg, Sweden..
    Rubensson, Jan-Erik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Berrah, N.
    Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA..
    Bucksbaum, P. H.
    SLAC Natl Accelerator Lab, PULSE Inst, Menlo Pk, CA 94025 USA.;Stanford Univ, Dept Phys, Stanford, CA 94305 USA.;Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA..
    Ueda, K.
    Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan..
    Feifel, R.
    Univ Gothenburg, Dept Phys, SE-41296 Gothenburg, Sweden..
    Frasinski, L. J.
    Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England..
    Marangos, J. P.
    Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England..
    Auger Electron and Photoabsorption Spectra of Glycine in the Vicinity of the Oxygen K-edge Measured with an X-FEL2015In: Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, E-ISSN 1361-6455, Vol. 48, no 23, article id 234004Article in journal (Refereed)
    Abstract [en]

    We report the first measurement of the near oxygen K-edge auger spectrum of the glycine molecule. Our work employed an x-ray free electron laser as the photon source operated with input photon energies tunable between 527 and 547 eV. Complete electron spectra were recorded at each photon energy in the tuning range, revealing resonant and non-resonant auger structures. Finally ab initio theoretical predictions are compared with the measured above the edge auger spectrum and an assignment of auger decay channels is performed.

  • 5.
    Sanchez-Gonzalez, A.
    et al.
    Imperial Coll London, Dept Phys, London SW7 2AZ, England..
    Micaelli, P.
    Imperial Coll London, Dept Phys, London SW7 2AZ, England..
    Olivier, C.
    Imperial Coll London, Dept Phys, London SW7 2AZ, England..
    Barillot, T. R.
    Imperial Coll London, Dept Phys, London SW7 2AZ, England..
    Ilchen, M.
    SLAC Natl Accelerator Lab, Stanford PULSE Inst, Menlo Pk, CA 94025 USA.;European XFEL GmbH, Holzkoppel 4, D-22869 Schenefeld, Germany..
    Lutman, A. A.
    SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA..
    Marinelli, A.
    SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA..
    Maxwell, T.
    SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA..
    Achner, A.
    European XFEL GmbH, Holzkoppel 4, D-22869 Schenefeld, Germany..
    Agåker, M.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Berrah, N.
    Univ Connecticut, Dept Phys, 2152 Hillside Rd,U-3046, Storrs, CT 06269 USA..
    Bostedt, C.
    SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA.;Argonne Natl Lab, Lemont, IL 60439 USA..
    Bozek, J. D.
    Synchrotron SOLEIL, F-91192 Gif Sur Yvette, France..
    Buck, J.
    DESY, Notkestr 85, D-22607 Hamburg, Germany..
    Bucksbaum, P. H.
    SLAC Natl Accelerator Lab, Stanford PULSE Inst, Menlo Pk, CA 94025 USA.;Stanford Univ, Dept Phys, 382 Via Pueblo Mall, Stanford, CA 94305 USA..
    Montero, S. Carron
    SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA.;Calif Lutheran Univ, Dept Phys, 60 West Olsen Rd, Thousand Oaks, CA 91360 USA..
    Cooper, B.
    Imperial Coll London, Dept Phys, London SW7 2AZ, England..
    Cryan, J. P.
    SLAC Natl Accelerator Lab, Stanford PULSE Inst, Menlo Pk, CA 94025 USA..
    Dong, M.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Feifel, R.
    Univ Gothenburg, Dept Phys, Origovagen 6B, S-41296 Gothenburg, Sweden..
    Frasinski, L. J.
    Imperial Coll London, Dept Phys, London SW7 2AZ, England..
    Fukuzawa, H.
    Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan..
    Galler, A.
    European XFEL GmbH, Holzkoppel 4, D-22869 Schenefeld, Germany..
    Hartmann, G.
    DESY, Notkestr 85, D-22607 Hamburg, Germany.;Univ Kassel, Inst Phys, Heinrich Plett Str 40, D-34132 Kassel, Germany.;Univ Kassel, CINSaT, Heinrich Plett Str 40, D-34132 Kassel, Germany..
    Hartmann, N.
    SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA..
    Helml, W.
    SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA.;Tech Univ Munich, Phys Dept E11, James Franck Str 1, D-85748 Garching, Germany..
    Johnson, A. S.
    Imperial Coll London, Dept Phys, London SW7 2AZ, England..
    Knie, A.
    Univ Kassel, Inst Phys, Heinrich Plett Str 40, D-34132 Kassel, Germany.;Univ Kassel, CINSaT, Heinrich Plett Str 40, D-34132 Kassel, Germany..
    Lindahl, A. O.
    SLAC Natl Accelerator Lab, Stanford PULSE Inst, Menlo Pk, CA 94025 USA.;Univ Gothenburg, Dept Phys, Origovagen 6B, S-41296 Gothenburg, Sweden..
    Liu, J.
    European XFEL GmbH, Holzkoppel 4, D-22869 Schenefeld, Germany..
    Motomura, K.
    Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan..
    Mucke, M.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    O'Grady, C.
    SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA..
    Rubensson, J-E.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Simpson, E. R.
    Imperial Coll London, Dept Phys, London SW7 2AZ, England..
    Squibb, R. J.
    Univ Gothenburg, Dept Phys, Origovagen 6B, S-41296 Gothenburg, Sweden..
    Sathe, C.
    Lund Univ, MAX Lab 4, Box 118, SE-22100 Lund, Sweden..
    Ueda, K.
    Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan..
    Vacher, M.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Theoretical Chemistry. Imperial Coll, Dept Chem, London SW7 2AZ, England..
    Walke, D. J.
    Imperial Coll London, Dept Phys, London SW7 2AZ, England..
    Zhaunerchyk, V.
    Univ Gothenburg, Dept Phys, Origovagen 6B, S-41296 Gothenburg, Sweden..
    Coffee, R. N.
    SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA..
    Marangos, J. P.
    Imperial Coll London, Dept Phys, London SW7 2AZ, England..
    Accurate prediction of X-ray pulse properties from a free-electron laser using machine learning2017In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 8, article id 15461Article in journal (Refereed)
    Abstract [en]

    Free-electron lasers providing ultra-short high-brightness pulses of X-ray radiation have great potential for a wide impact on science, and are a critical element for unravelling the structural dynamics of matter. To fully harness this potential, we must accurately know the X-ray properties: intensity, spectrum and temporal profile. Owing to the inherent fluctuations in free-electron lasers, this mandates a full characterization of the properties for each and every pulse. While diagnostics of these properties exist, they are often invasive and many cannot operate at a high-repetition rate. Here, we present a technique for circumventing this limitation. Employing a machine learning strategy, we can accurately predict X-ray properties for every shot using only parameters that are easily recorded at high-repetition rate, by training a model on a small set of fully diagnosed pulses. This opens the door to fully realizing the promise of next-generation high-repetition rate X-ray lasers.

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