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Błachucki W, Johnson PJM, Usov I, Divall E, Cirelli C, Knopp G, Juranić P, Patthey L, Szlachetko J, Lemke H, Milne C, Arrell C. Correlation of refractive index based and THz streaking arrival time tools for a hard X-ray free-electron laser. JOURNAL OF SYNCHROTRON RADIATION 2024; 31:233-242. [PMID: 38252522 PMCID: PMC10914176 DOI: 10.1107/s1600577523010500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 12/07/2023] [Indexed: 01/24/2024]
Abstract
To fully exploit ultra-short X-ray pulse durations routinely available at X-ray free-electron lasers to follow out-of-equilibrium dynamics, inherent arrival time fluctuations of the X-ray pulse with an external perturbing laser pulse need to be measured. In this work, two methods of arrival time measurement were compared to measure the arrival time jitter of hard X-ray pulses. The methods were photoelectron streaking by a THz field and a transient refractive index change of a semiconductor. The methods were validated by shot-to-shot correction of a pump-probe transient reflectivity measurement. An ultimate shot-to-shot full width at half-maximum error between the devices of 19.2 ± 0.1 fs was measured.
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Affiliation(s)
- Wojciech Błachucki
- Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Kraków, Poland
| | | | - Ivan Usov
- SwissFEL, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Edwin Divall
- SwissFEL, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Claudio Cirelli
- SwissFEL, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Gregor Knopp
- SwissFEL, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Pavle Juranić
- SwissFEL, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Luc Patthey
- SwissFEL, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Jakub Szlachetko
- National Synchrotron Radiation Centre Solaris, Jagiellonian University, 30-387 Kraków, Poland
| | - Henrik Lemke
- SwissFEL, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Christopher Milne
- SwissFEL, Paul Scherrer Institute, 5232 Villigen, Switzerland
- European XFEL GmbH, 22869 Schenefeld, Germany
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2
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Approaching the Attosecond Frontier of Dynamics in Matter with the Concept of X-ray Chronoscopy. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12031721] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
X-ray free electron lasers (XFELs) have provided scientists opportunities to study matter with unprecedented temporal and spatial resolutions. However, access to the attosecond domain (i.e., below 1 femtosecond) remains elusive. Herein, a time-dependent experimental concept is theorized, allowing us to track ultrafast processes in matter with sub-fs resolution. The proposed X-ray chronoscopy approach exploits the state-of-the-art developments in terahertz streaking to measure the time structure of X-ray pulses with ultrahigh temporal resolution. The sub-femtosecond dynamics of the saturable X-ray absorption process is simulated. The employed rate equation model confirms that the X-ray-induced mechanisms leading to X-ray transparency can be probed via measurement of an X-ray pulse time structure.
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3
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Wieland M, Kabachnik NM, Drescher M, Deng Y, Arbelo Y, Stojanovic N, Steffen B, Roensch-Schulenburg J, Ischebeck R, Malyzhenkov A, Prat E, Juranić P. Deriving x-ray pulse duration from center-of-energy shifts in THz-streaked ionized electron spectra. OPTICS EXPRESS 2021; 29:32739-32754. [PMID: 34809098 DOI: 10.1364/oe.432761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 08/20/2021] [Indexed: 06/13/2023]
Abstract
A fast and robust, yet simple, method has been developed for the immediate characterization of x-ray pulse durations via IR/THz streaking that uses the center of energy (COE) of the photoelectron spectrum for the evaluation. The manuscript presents theory and numerical models demonstrating that the maximum COEs shift as a function of the pulse duration and compares them to existing data for validation. It further establishes that the maximum COE can be derived from two COE measurements set at a phase of π/2 apart. The theory, model, and data agree with each other very well, and they present a way to measure pulse durations ranging from sub-fs to tens of fs on-the-fly with a fairly simple experimental setup.
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4
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A self-referenced in-situ arrival time monitor for X-ray free-electron lasers. Sci Rep 2021; 11:3562. [PMID: 33574378 PMCID: PMC7878505 DOI: 10.1038/s41598-021-82597-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 01/21/2021] [Indexed: 11/30/2022] Open
Abstract
We present a novel, highly versatile, and self-referenced arrival time monitor for measuring the femtosecond time delay between a hard X-ray pulse from a free-electron laser and an optical laser pulse, measured directly on the same sample used for pump-probe experiments. Two chirped and picosecond long optical supercontinuum pulses traverse the sample with a mutually fixed time delay of 970 fs, while a femtosecond X-ray pulse arrives at an instant in between both pulses. Behind the sample the supercontinuum pulses are temporally overlapped to yield near-perfect destructive interference in the absence of the X-ray pulse. Stimulation of the sample with an X-ray pulse delivers non-zero contributions at certain optical wavelengths, which serve as a measure of the relative arrival time of the X-ray pulse with an accuracy of better than 25 fs. We find an excellent agreement of our monitor with the existing timing diagnostics at the SACLA XFEL with a Pearson correlation value of 0.98. We demonstrate a high sensitivity to measure X-ray pulses with pulse energies as low as 30 \documentclass[12pt]{minimal}
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\begin{document}$$\upmu $$\end{document}μJ. Using a free-flowing liquid jet as interaction sample ensures the full replacement of the sample volume for each X-ray/optical event, thus enabling its utility even at MHz repetition rate XFEL sources.
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5
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Oelze T, Kulyk O, Schütte B, Frühling U, Klimešová E, Jagielski B, Dittrich L, Drescher M, Pan R, Stojanovic N, Polovinkin V, Khakurel KP, Muehlig K, Bermudez Macias IJ, Düsterer S, Faatz B, Andreasson J, Wieland M, Krikunova M. THz streak camera performance for single-shot characterization of XUV pulses with complex temporal structures. OPTICS EXPRESS 2020; 28:20686-20703. [PMID: 32680123 DOI: 10.1364/oe.393547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 06/01/2020] [Indexed: 06/11/2023]
Abstract
The THz-field-driven streak camera has proven to be a powerful diagnostic-technique that enables the shot-to-shot characterization of the duration and the arrival time jitter of free electron laser (FEL) pulses. Here we investigate the performance of three computational approaches capable to determine the duration of FEL pulses with complex temporal structures from single-shot measurements of up to three simultaneously recorded spectra. We use numerically simulated FEL pulses in order to validate the accuracy of the pulse length retrieval in average as well as in a single-shot mode. We discuss requirements for the THz field strength in order to achieve reliable results and compare our numerical study with the analysis of experimental data that were obtained at the FEL in Hamburg - FLASH.
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6
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Hirmiz N, Tsikouras A, Osterlund EJ, Richards M, Andrews DW, Fang Q. Cross-talk reduction in a multiplexed synchroscan streak camera with simultaneous calibration. OPTICS EXPRESS 2019; 27:22602-22614. [PMID: 31510548 DOI: 10.1364/oe.27.022602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 07/14/2019] [Indexed: 06/10/2023]
Abstract
The streak camera is a picosecond resolution photodetector with parallel input capability; however, the degree of multiplexing is limited by crosstalk and temporal uncertainty in the sweeping field. We introduced a fixed time delay between adjacent fibers to reduce crosstalk in the synchroscan mode. The fixed delay and a tunable electronic delay between the input pulse and the synchroscan unit allows robust separation modes between the streaks, while spatial and temporal nonlinearities can be calibrated in. The efficacy of the design is demonstrated through a 100-fold multiplexed confocal fluorescence lifetime imaging microscope in live cells.
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7
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Ingold G, Abela R, Arrell C, Beaud P, Böhler P, Cammarata M, Deng Y, Erny C, Esposito V, Flechsig U, Follath R, Hauri C, Johnson S, Juranic P, Mancini GF, Mankowsky R, Mozzanica A, Oggenfuss RA, Patterson BD, Patthey L, Pedrini B, Rittmann J, Sala L, Savoini M, Svetina C, Zamofing T, Zerdane S, Lemke HT. Experimental station Bernina at SwissFEL: condensed matter physics on femtosecond time scales investigated by X-ray diffraction and spectroscopic methods. JOURNAL OF SYNCHROTRON RADIATION 2019; 26:874-886. [PMID: 31074452 PMCID: PMC6510206 DOI: 10.1107/s160057751900331x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 03/07/2019] [Indexed: 05/22/2023]
Abstract
The Bernina instrument at the SwissFEL Aramis hard X-ray free-electron laser is designed for studying ultrafast phenomena in condensed matter and material science. Ultrashort pulses from an optical laser system covering a large wavelength range can be used to generate specific non-equilibrium states, whose subsequent temporal evolution can be probed by selective X-ray scattering techniques in the range 2-12 keV. For that purpose, the X-ray beamline is equipped with optical elements which tailor the X-ray beam size and energy, as well as with pulse-to-pulse diagnostics that monitor the X-ray pulse intensity, position, as well as its spectral and temporal properties. The experiments can be performed using multiple interchangeable endstations differing in specialization, diffractometer and X-ray analyser configuration and load capacity for specialized sample environment. After testing the instrument in a series of pilot experiments in 2018, regular user operation begins in 2019.
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Affiliation(s)
- Gerhard Ingold
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
- Correspondence e-mail: ,
| | - Rafael Abela
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | | | - Paul Beaud
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Pirmin Böhler
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Marco Cammarata
- Institut de Physique de Rennes, Université de Rennes, 35042 Rennes CEDEX, France
| | - Yunpei Deng
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Christian Erny
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Vincent Esposito
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Uwe Flechsig
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Rolf Follath
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Christoph Hauri
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Steven Johnson
- Institute for Quantum Electronics, Eidgenössische Technische Hochschule (ETH) Zürich, CH-8093 Zurich, Switzerland
| | - Pavle Juranic
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | | | - Roman Mankowsky
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Aldo Mozzanica
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | | | | | - Luc Patthey
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Bill Pedrini
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Jochen Rittmann
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Leonardo Sala
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Matteo Savoini
- Institute for Quantum Electronics, Eidgenössische Technische Hochschule (ETH) Zürich, CH-8093 Zurich, Switzerland
| | - Cristian Svetina
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Thierry Zamofing
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Serhane Zerdane
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Henrik Till Lemke
- SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
- Correspondence e-mail: ,
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Juranić P, Rehanek J, Arrell CA, Pradervand C, Ischebeck R, Erny C, Heimgartner P, Gorgisyan I, Thominet V, Tiedtke K, Sorokin A, Follath R, Makita M, Seniutinas G, David C, Milne CJ, Lemke H, Radovic M, Hauri CP, Patthey L. SwissFEL Aramis beamline photon diagnostics. JOURNAL OF SYNCHROTRON RADIATION 2018; 25:1238-1248. [PMID: 29979187 PMCID: PMC6038612 DOI: 10.1107/s1600577518005775] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 04/13/2018] [Indexed: 05/22/2023]
Abstract
The SwissFEL Aramis beamline, covering the photon energies between 1.77 keV and 12.7 keV, features a suite of online photon diagnostics tools to help both users and FEL operators in analysing data and optimizing experimental and beamline performance. Scientists will be able to obtain information about the flux, spectrum, position, pulse length, and arrival time jitter versus the experimental laser for every photon pulse, with further information about beam shape and size available through the use of destructive screens. This manuscript is an overview of the diagnostics tools available at SwissFEL and presents their design, working principles and capabilities. It also features new developments like the first implementation of a THz-streaking based temporal diagnostics for a hard X-ray FEL, capable of measuring pulse lengths to 5 fs r.m.s. or better.
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Affiliation(s)
- Pavle Juranić
- SwissFEL, Paul Scherrer Institut, Villigen 5232, Switzerland
- Correspondence e-mail:
| | - Jens Rehanek
- SwissFEL, Paul Scherrer Institut, Villigen 5232, Switzerland
| | | | | | | | - Christian Erny
- SwissFEL, Paul Scherrer Institut, Villigen 5232, Switzerland
| | | | | | | | - Kai Tiedtke
- DESY, Notkestrasse 85, Hamburg 22607, Germany
| | - Andrey Sorokin
- DESY, Notkestrasse 85, Hamburg 22607, Germany
- Ioffe Physico-Technical Institute, Politekhnicheskaya 26, St Petersburg 194021, Russia
| | - Rolf Follath
- SwissFEL, Paul Scherrer Institut, Villigen 5232, Switzerland
| | - Mikako Makita
- European XFEL, Holzkoppel 4, Schenefeld 22869, Germany
| | | | | | | | - Henrik Lemke
- SwissFEL, Paul Scherrer Institut, Villigen 5232, Switzerland
| | - Milan Radovic
- SwissFEL, Paul Scherrer Institut, Villigen 5232, Switzerland
| | | | - Luc Patthey
- SwissFEL, Paul Scherrer Institut, Villigen 5232, Switzerland
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9
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Nakajima K, Joti Y, Katayama T, Owada S, Togashi T, Abe T, Kameshima T, Okada K, Sugimoto T, Yamaga M, Hatsui T, Yabashi M. Software for the data analysis of the arrival-timing monitor at SACLA. JOURNAL OF SYNCHROTRON RADIATION 2018; 25:592-603. [PMID: 29488941 DOI: 10.1107/s1600577517016654] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 11/19/2017] [Indexed: 06/08/2023]
Abstract
X-ray free-electron laser (XFEL) pulses from SPring-8 Ångstrom Compact free-electron LAser (SACLA) with a temporal duration of <10 fs have provided a variety of benefits in scientific research. In a previous study, an arrival-timing monitor was developed to improve the temporal resolution in pump-probe experiments at beamline 3 by rearranging data in the order of the arrival-timing jitter between the XFEL and the synchronized optical laser pulses. This paper presents Timing Monitor Analyzer (TMA), a software package by which users can conveniently obtain arrival-timing data in the analysis environment at SACLA. The package is composed of offline tools that pull stored data from cache storage, and online tools that pull data from a data-handling server in semi-real time during beam time. Users can select the most suitable tool for their purpose, and share the results through a network connection between the offline and online analysis environments.
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Affiliation(s)
- Kyo Nakajima
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Yasumasa Joti
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Tetsuo Katayama
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Shigeki Owada
- SPring-8 Center, RIKEN, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Tadashi Togashi
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Toshinori Abe
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Takashi Kameshima
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Kensuke Okada
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Takashi Sugimoto
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Mitsuhiro Yamaga
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Takaki Hatsui
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Makina Yabashi
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
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Seddon EA, Clarke JA, Dunning DJ, Masciovecchio C, Milne CJ, Parmigiani F, Rugg D, Spence JCH, Thompson NR, Ueda K, Vinko SM, Wark JS, Wurth W. Short-wavelength free-electron laser sources and science: a review. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2017; 80:115901. [PMID: 29059048 DOI: 10.1088/1361-6633/aa7cca] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
This review is focused on free-electron lasers (FELs) in the hard to soft x-ray regime. The aim is to provide newcomers to the area with insights into: the basic physics of FELs, the qualities of the radiation they produce, the challenges of transmitting that radiation to end users and the diversity of current scientific applications. Initial consideration is given to FEL theory in order to provide the foundation for discussion of FEL output properties and the technical challenges of short-wavelength FELs. This is followed by an overview of existing x-ray FEL facilities, future facilities and FEL frontiers. To provide a context for information in the above sections, a detailed comparison of the photon pulse characteristics of FEL sources with those of other sources of high brightness x-rays is made. A brief summary of FEL beamline design and photon diagnostics then precedes an overview of FEL scientific applications. Recent highlights are covered in sections on structural biology, atomic and molecular physics, photochemistry, non-linear spectroscopy, shock physics, solid density plasmas. A short industrial perspective is also included to emphasise potential in this area.
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Affiliation(s)
- E A Seddon
- ASTeC, STFC Daresbury Laboratory, Sci-Tech Daresbury, Keckwick Lane, Daresbury, Cheshire, WA4 4AD, United Kingdom. The School of Physics and Astronomy and Photon Science Institute, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom. The Cockcroft Institute, Sci-Tech Daresbury, Keckwick Lane, Daresbury, Cheshire, WA4 4AD, United Kingdom
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11
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Abela R, Beaud P, van Bokhoven JA, Chergui M, Feurer T, Haase J, Ingold G, Johnson SL, Knopp G, Lemke H, Milne CJ, Pedrini B, Radi P, Schertler G, Standfuss J, Staub U, Patthey L. Perspective: Opportunities for ultrafast science at SwissFEL. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2017; 4:061602. [PMID: 29376109 PMCID: PMC5758366 DOI: 10.1063/1.4997222] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Accepted: 10/17/2017] [Indexed: 05/03/2023]
Abstract
We present the main specifications of the newly constructed Swiss Free Electron Laser, SwissFEL, and explore its potential impact on ultrafast science. In light of recent achievements at current X-ray free electron lasers, we discuss the potential territory for new scientific breakthroughs offered by SwissFEL in Chemistry, Biology, and Materials Science, as well as nonlinear X-ray science.
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Affiliation(s)
- Rafael Abela
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Paul Beaud
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Jeroen A van Bokhoven
- Laboratory for Catalysis and Sustainable Chemistry, Paul-Scherrer Institute, 5232 Villigen PSI, and Department of Chemistry, ETH-Zürich, 8093 Zürich, Switzerland
| | - Majed Chergui
- Laboratoire de Spectroscopie Ultrarapide (LSU) and Lausanne Centre for Ultrafast Science (LACUS), Ecole Polytechnique Fédérale de Lausanne (EPFL), ISIC-FSB, Station 6, 1015 Lausanne, Switzerland
| | - Thomas Feurer
- Institute of Applied Physics, University of Bern, Bern, Switzerland
| | - Johannes Haase
- Laboratory for Catalysis and Sustainable Chemistry, Paul-Scherrer Institute, 5232 Villigen PSI, and Department of Chemistry, ETH-Zürich, 8093 Zürich, Switzerland
| | - Gerhard Ingold
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Steven L Johnson
- Institute for Quantum Electronics, Eidgenössische Technische Hochschule (ETH) Zürich, 8093 Zurich, Switzerland
| | - Gregor Knopp
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Henrik Lemke
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Chris J Milne
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Bill Pedrini
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Peter Radi
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | | | - Jörg Standfuss
- Division of Biology and Chemistry, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Urs Staub
- Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - Luc Patthey
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
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13
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14
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Obara Y, Ito H, Ito T, Kurahashi N, Thürmer S, Tanaka H, Katayama T, Togashi T, Owada S, Yamamoto YI, Karashima S, Nishitani J, Yabashi M, Suzuki T, Misawa K. Femtosecond time-resolved X-ray absorption spectroscopy of anatase TiO 2 nanoparticles using XFEL. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2017; 4:044033. [PMID: 28713842 PMCID: PMC5493491 DOI: 10.1063/1.4989862] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 06/12/2017] [Indexed: 05/19/2023]
Abstract
The charge-carrier dynamics of anatase TiO2 nanoparticles in an aqueous solution were studied by femtosecond time-resolved X-ray absorption spectroscopy using an X-ray free electron laser in combination with a synchronized ultraviolet femtosecond laser (268 nm). Using an arrival time monitor for the X-ray pulses, we obtained a temporal resolution of 170 fs. The transient X-ray absorption spectra revealed an ultrafast Ti K-edge shift and a subsequent growth of a pre-edge structure. The edge shift occurred in ca. 100 fs and is ascribed to reduction of Ti by localization of generated conduction band electrons into shallow traps of self-trapped polarons or deep traps at penta-coordinate Ti sites. Growth of the pre-edge feature and reduction of the above-edge peak intensity occur with similar time constants of 300-400 fs, which we assign to the structural distortion dynamics near the surface.
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Affiliation(s)
| | - Hironori Ito
- Interdisciplinary Research Unit in Photon-Nano Science, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Terumasa Ito
- Department of Applied Physics, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Naoya Kurahashi
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Stephan Thürmer
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hiroki Tanaka
- Department of Applied Physics, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Tetsuo Katayama
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Tadashi Togashi
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Shigeki Owada
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Yo-Ichi Yamamoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Shutaro Karashima
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Junichi Nishitani
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Makina Yabashi
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Toshinori Suzuki
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
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