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M. Jurcevic

Bio: M. Jurcevic is an academic researcher from Paul Scherrer Institute. The author has contributed to research in topics: Free-electron laser & Undulator. The author has an hindex of 4, co-authored 4 publications receiving 281 citations.

Papers
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Journal ArticleDOI
Christopher J. Milne, Thomas Schietinger, M. Aiba, Arturo Alarcon, J. Alex, Alexander Anghel, Vladimir Arsov, Carl Beard, Paul Beaud, Simona Bettoni, M. Bopp, H. Brands, Manuel Brönnimann, Ingo Brunnenkant, Marco Calvi, A. Citterio, Paolo Craievich, Marta Csatari Divall, Mark Dällenbach, Michael D’Amico, Andreas Dax, Yunpei Deng, Alexander Dietrich, Roberto Dinapoli, Edwin Divall, Sladana Dordevic, Simon Ebner, Christian Erny, Hansrudolf Fitze, Uwe Flechsig, Rolf Follath, F. Frei, Florian Gärtner, Romain Ganter, Terence Garvey, Zheqiao Geng, I. Gorgisyan, C. Gough, A. Hauff, Christoph P. Hauri, Nicole Hiller, Tadej Humar, Stephan Hunziker, Gerhard Ingold, Rasmus Ischebeck, Markus Janousch, Pavle Juranić, M. Jurcevic, Maik Kaiser, Babak Kalantari, Roger Kalt, B. Keil, Christoph Kittel, Gregor Knopp, W. Koprek, Henrik T. Lemke, Thomas Lippuner, Daniel Llorente Sancho, Florian Löhl, C. Lopez-Cuenca, Fabian Märki, F. Marcellini, G. Marinkovic, Isabelle Martiel, Ralf Menzel, Aldo Mozzanica, Karol Nass, Gian Luca Orlandi, Cigdem Ozkan Loch, Ezequiel Panepucci, Martin Paraliev, Bruce D. Patterson, Bill Pedrini, Marco Pedrozzi, Patrick Pollet, Claude Pradervand, Eduard Prat, Peter Radi, Jean-Yves Raguin, S. Redford, Jens Rehanek, Julien Réhault, Sven Reiche, Matthias Ringele, J. Rittmann, Leonid Rivkin, Albert Romann, Marie Ruat, C. Ruder, Leonardo Sala, Lionel Schebacher, T. Schilcher, Volker Schlott, Thomas J. Schmidt, Bernd Schmitt, Xintian Shi, M. Stadler, L. Stingelin, Werner Sturzenegger, Jakub Szlachetko, D. Thattil, D. Treyer, A. Trisorio, Wolfgang Tron, S. Vetter, Carlo Vicario, Didier Voulot, Meitian Wang, Thierry Zamofing, Christof Zellweger, R. Zennaro, Elke Zimoch, Rafael Abela, Luc Patthey, Hans-Heinrich Braun 
TL;DR: The SwissFEL X-ray Free Electron Laser (XFEL) facility as discussed by the authors started construction at the Paul Scherrer Institute (Villigen, Switzerland) in 2013 and will be ready to accept its first users in 2018 on the Aramis hard Xray branch.
Abstract: The SwissFEL X-ray Free Electron Laser (XFEL) facility started construction at the Paul Scherrer Institute (Villigen, Switzerland) in 2013 and will be ready to accept its first users in 2018 on the Aramis hard X-ray branch. In the following sections we will summarize the various aspects of the project, including the design of the soft and hard X-ray branches of the accelerator, the results of SwissFEL performance simulations, details of the photon beamlines and experimental stations, and our first commissioning results.

295 citations

Journal ArticleDOI
Eduard Prat1, Rafael Abela1, M. Aiba1, Arturo Alarcon1, J. Alex1, Yunieski Arbelo1, Christopher Arrell1, Vladimir Arsov1, Camila Bacellar2, Camila Bacellar1, Carl Beard1, Paul Beaud1, Simona Bettoni1, Roger Biffiger1, M. Bopp1, Hans-Heinrich Braun1, Marco Calvi1, Ariana Cassar3, Tine Celcer1, Majed Chergui2, Pavel Chevtsov1, Claudio Cirelli1, A. Citterio1, Paolo Craievich1, Marta Csatari Divall1, Andreas Dax1, Micha Dehler1, Yunpei Deng1, Alexander Dietrich1, Philipp Dijkstal1, Philipp Dijkstal4, Roberto Dinapoli1, Sladana Dordevic1, Simon Ebner1, Daniel Engeler1, Christian Erny1, Vincent Esposito5, Vincent Esposito1, Eugenio Ferrari1, Uwe Flechsig1, Rolf Follath1, F. Frei1, Romain Ganter1, Terence Garvey1, Zheqiao Geng1, Alexandre Gobbo1, C. Gough1, A. Hauff1, Christoph P. Hauri1, Nicole Hiller1, Stephan Hunziker1, Martin Huppert1, Gerhard Ingold1, Rasmus Ischebeck1, Markus Janousch1, Philip J. M. Johnson1, Steven L. Johnson1, Steven L. Johnson4, Pavle Juranić1, M. Jurcevic1, Maik Kaiser1, Roger Kalt1, B. Keil1, Daniela Kiselev1, Christoph Kittel1, Gregor Knopp1, W. Koprek1, Michael Laznovsky1, Henrik T. Lemke1, Daniel Llorente Sancho1, Florian Löhl1, Alexander Malyzhenkov1, Giulia F. Mancini2, Giulia F. Mancini1, Roman Mankowsky1, F. Marcellini1, G. Marinkovic1, Isabelle Martiel1, Fabian Märki1, Christopher J. Milne1, Aldo Mozzanica1, Karol Nass1, Gian Luca Orlandi1, Cigdem Ozkan Loch1, Martin Paraliev1, Bruce D. Patterson1, Luc Patthey1, Bill Pedrini1, Marco Pedrozzi1, Claude Pradervand1, Peter Radi1, Jean-Yves Raguin1, S. Redford1, Jens Rehanek1, Sven Reiche1, Leonid Rivkin1, Albert Romann1, Leonardo Sala1, Mathias Sander1, Thomas Schietinger1, T. Schilcher1, Volker Schlott1, Thomas J. Schmidt1, Mike Seidel1, M. Stadler1, L. Stingelin1, C. Svetina1, D. Treyer1, A. Trisorio1, Carlo Vicario1, Didier Voulot1, A. Wrulich1, Serhane Zerdane1, Elke Zimoch1 
TL;DR: In this article, the first lasing results of SwissFEL, a hard X-ray free-electron laser (FEL) that recently came into operation at the Paul Scherrer Institute in Switzerland, were presented.
Abstract: We present the first lasing results of SwissFEL, a hard X-ray free-electron laser (FEL) that recently came into operation at the Paul Scherrer Institute in Switzerland. SwissFEL is a very stable, compact and cost-effective X-ray FEL facility driven by a low-energy and ultra-low-emittance electron beam travelling through short-period undulators. It delivers stable hard X-ray FEL radiation at 1-A wavelength with pulse energies of more than 500 μJ, pulse durations of ~30 fs (root mean square) and spectral bandwidth below the per-mil level. Using special configurations, we have produced pulses shorter than 1 fs and, in a different set-up, broadband radiation with an unprecedented bandwidth of ~2%. The extremely small emittance demonstrated at SwissFEL paves the way for even more compact and affordable hard X-ray FELs, potentially boosting the number of facilities worldwide and thereby expanding the population of the scientific community that has access to X-ray FEL radiation. The first lasing results at SwissFEL, an X-ray free-electron laser, are presented, highlighting the facility’s unique capabilities. A general comparison to other major facilities is also provided.

118 citations

01 Jan 2014
TL;DR: The architecture design of the LLRF system will be described in this paper with the focus on the fast networks, digital hardware, firmware and software.
Abstract: The SwissFEL under construction at the Paul Scherrer Institut (PSI) requires high quality electron beams to generate X-ray Free Electron Laser (FEL) for various experiments. The Low Level Radio Frequency (LLRF) system is used to control the klystrons to provide highly stable RF field in cavities for beam acceleration. There are more than 30 RF stations in the SwissFEL accelerator with different frequencies (S-band, C-band and X-band) and different types of cavities (normal conducting standing wave cavities or traveling wave structures). Each RF station will be controlled by a LLRF node and all RF stations will be connected to the real-time network in the scope of the global beam based feedback system. High level applications and automation procedures will be defined to facilitate the operation of the RF systems. In order to handle the complexity of the LLRF system, the system architecture is carefully designed considering the external interfaces, functions and performance requirements to the LLRF system. The architecture design of the LLRF system will be described in this paper with the focus on the fast networks, digital hardware, firmware and software.

13 citations

01 Jan 2014
TL;DR: In this article, a prototype of the LLRF system consisting of the digital back-end together with a C-band RF front-end was installed in the SwissFEL Cband test facility.
Abstract: The SwissFEL is driven by more than 30 RF stations at different frequencies (S-, C-, X-band). To control the RF a new, in-house developed digital Low Level RF (LLRF) system measures up to 24 RF signals per station and performs a pulse-to-pulse feedback at a repetition rate of 100 Hz. The RF signals are down-converted to a common intermediate frequency. The state-of-the-art digital processing units are integrated into the PSI’s EPICS controls environment. Emphasis has been put on modularity of the system to provide a well-defined path for upgrades. Thus the RF front-ends are separated from the digital processing units with their FMC standard interfaces for ADCs and DACs. A first prototype of the LLRF system consisting of the digital back-end together with a C-band RF front-end was installed in the SwissFEL C-band test facility. In this report the performance of the prototype system has been compared with the LLRF system requirements for SwissFEL. The critical parameters are high intra-pulse phase and amplitude resolutions, good channel-to-channel isolations, very low phase-to-amplitude modulation and a negligible temperature drift.

12 citations

Journal ArticleDOI
TL;DR: In this article , a fast and high-stability beam kicker was used to separate the two electron bunches without disturbing the electron beam and consequently the x-ray lasing.
Abstract: SwissFEL has a unique capability, among the normal conducting linac-based light sources, to simultaneously serve two separate undulator lines (Aramis and Athos) up to the machine repetition rate of 100 Hz using the double bunch operation mode. It increases twice the experiments throughput of the facility with modest additional investment. Two electron bunches spaced 28 ns apart are extracted from the cathode by two laser pulses with individually controlled repetition rates. The bunches are accelerated up to about 3 GeV in the main linac using the same rf macropulse. After separation, one bunch serves the Athos soft x-ray beamline and the other is further accelerated to serve the hard x-ray beamline – Aramis. A fast and high-stability beam kicker separates the two bunches without disturbing the electron beam and consequently the x-ray lasing. The timing and control system sets hybrid machine modes utilizing independent operation of the two undulator lines with individually programmed repetition rates. Beam diagnostics and feedback systems have to operate with two closely spaced bunches where the two beams share the same machine path. The low-level rf system manipulates the rf amplitude and phase within a fraction of the rf macropulse to provide decoupling of the acceleration parameters of the first and the second bunch. This manuscript presents measurements that show that the bunch separation does not degrade FEL lasing stability.13 MoreReceived 7 July 2022Accepted 4 November 2022DOI:https://doi.org/10.1103/PhysRevAccelBeams.25.120701Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasAccelerator/storage ring control systemsBeam diagnosticsBeam injection, extraction & transportBeam optics correction schemesBeam optics transportBeam processesBeam techniquesRadio frequency power sourcesAccelerators & Beams

3 citations


Cited by
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01 Jan 2015
TL;DR: Density functional theory calculations indicate that new electronic states appear in the O K-edge x-ray absorption spectrum that result from changes in the adsorption site and bond formation between CO and O with a distribution of OC–O bond lengths close to the transition state (TS).
Abstract: Catching CO oxidation Details of the transition state that forms as carbon monoxide (CO) adsorbed on a ruthenium surface is oxidized to CO2 have been revealed by ultrafast excitation and probe methods. Öström et al. initiated the reaction between CO and adsorbed oxygen atoms with laser pulses that rapidly heated the surface and then probed the changes in electronic structure with oxygen x-ray absorption spectroscopy. They observed transition-state configurations that are consistent with density functional theory and a quantum oscillator model. Science, this issue p. 978 Ultrafast x-ray spectroscopy reveals electronic changes that occur during the oxidation of carbon monoxide on a ruthenium surface. Femtosecond x-ray laser pulses are used to probe the carbon monoxide (CO) oxidation reaction on ruthenium (Ru) initiated by an optical laser pulse. On a time scale of a few hundred femtoseconds, the optical laser pulse excites motions of CO and oxygen (O) on the surface, allowing the reactants to collide, and, with a transient close to a picosecond (ps), new electronic states appear in the O K-edge x-ray absorption spectrum. Density functional theory calculations indicate that these result from changes in the adsorption site and bond formation between CO and O with a distribution of OC–O bond lengths close to the transition state (TS). After 1 ps, 10% of the CO populate the TS region, which is consistent with predictions based on a quantum oscillator model.

160 citations

Journal ArticleDOI
TL;DR: In this article, the time-energy information of ultrashort X-ray free-electron laser pulses generated by the Linac Coherent Light Source is measured with attosecond resolution via angular streaking of neon 1s photoelectrons.
Abstract: The time–energy information of ultrashort X-ray free-electron laser pulses generated by the Linac Coherent Light Source is measured with attosecond resolution via angular streaking of neon 1s photoelectrons. The X-ray pulses promote electrons from the neon core level into an ionization continuum, where they are dressed with the electric field of a circularly polarized infrared laser. This induces characteristic modulations of the resulting photoelectron energy and angular distribution. From these modulations we recover the single-shot attosecond intensity structure and chirp of arbitrary X-ray pulses based on self-amplified spontaneous emission, which have eluded direct measurement so far. We characterize individual attosecond pulses, including their instantaneous frequency, and identify double pulses with well-defined delays and spectral properties, thus paving the way for X-ray pump/X-ray probe attosecond free-electron laser science.

144 citations

Journal ArticleDOI
Eduard Prat1, Rafael Abela1, M. Aiba1, Arturo Alarcon1, J. Alex1, Yunieski Arbelo1, Christopher Arrell1, Vladimir Arsov1, Camila Bacellar2, Camila Bacellar1, Carl Beard1, Paul Beaud1, Simona Bettoni1, Roger Biffiger1, M. Bopp1, Hans-Heinrich Braun1, Marco Calvi1, Ariana Cassar3, Tine Celcer1, Majed Chergui2, Pavel Chevtsov1, Claudio Cirelli1, A. Citterio1, Paolo Craievich1, Marta Csatari Divall1, Andreas Dax1, Micha Dehler1, Yunpei Deng1, Alexander Dietrich1, Philipp Dijkstal1, Philipp Dijkstal4, Roberto Dinapoli1, Sladana Dordevic1, Simon Ebner1, Daniel Engeler1, Christian Erny1, Vincent Esposito1, Vincent Esposito5, Eugenio Ferrari1, Uwe Flechsig1, Rolf Follath1, F. Frei1, Romain Ganter1, Terence Garvey1, Zheqiao Geng1, Alexandre Gobbo1, C. Gough1, A. Hauff1, Christoph P. Hauri1, Nicole Hiller1, Stephan Hunziker1, Martin Huppert1, Gerhard Ingold1, Rasmus Ischebeck1, Markus Janousch1, Philip J. M. Johnson1, Steven L. Johnson1, Steven L. Johnson4, Pavle Juranić1, M. Jurcevic1, Maik Kaiser1, Roger Kalt1, B. Keil1, Daniela Kiselev1, Christoph Kittel1, Gregor Knopp1, W. Koprek1, Michael Laznovsky1, Henrik T. Lemke1, Daniel Llorente Sancho1, Florian Löhl1, Alexander Malyzhenkov1, Giulia F. Mancini1, Giulia F. Mancini2, Roman Mankowsky1, F. Marcellini1, G. Marinkovic1, Isabelle Martiel1, Fabian Märki1, Christopher J. Milne1, Aldo Mozzanica1, Karol Nass1, Gian Luca Orlandi1, Cigdem Ozkan Loch1, Martin Paraliev1, Bruce D. Patterson1, Luc Patthey1, Bill Pedrini1, Marco Pedrozzi1, Claude Pradervand1, Peter Radi1, Jean-Yves Raguin1, S. Redford1, Jens Rehanek1, Sven Reiche1, Leonid Rivkin1, Albert Romann1, Leonardo Sala1, Mathias Sander1, Thomas Schietinger1, T. Schilcher1, Volker Schlott1, Thomas J. Schmidt1, Mike Seidel1, M. Stadler1, L. Stingelin1, C. Svetina1, D. Treyer1, A. Trisorio1, Carlo Vicario1, Didier Voulot1, A. Wrulich1, Serhane Zerdane1, Elke Zimoch1 
TL;DR: In this article, the first lasing results of SwissFEL, a hard X-ray free-electron laser (FEL) that recently came into operation at the Paul Scherrer Institute in Switzerland, were presented.
Abstract: We present the first lasing results of SwissFEL, a hard X-ray free-electron laser (FEL) that recently came into operation at the Paul Scherrer Institute in Switzerland. SwissFEL is a very stable, compact and cost-effective X-ray FEL facility driven by a low-energy and ultra-low-emittance electron beam travelling through short-period undulators. It delivers stable hard X-ray FEL radiation at 1-A wavelength with pulse energies of more than 500 μJ, pulse durations of ~30 fs (root mean square) and spectral bandwidth below the per-mil level. Using special configurations, we have produced pulses shorter than 1 fs and, in a different set-up, broadband radiation with an unprecedented bandwidth of ~2%. The extremely small emittance demonstrated at SwissFEL paves the way for even more compact and affordable hard X-ray FELs, potentially boosting the number of facilities worldwide and thereby expanding the population of the scientific community that has access to X-ray FEL radiation. The first lasing results at SwissFEL, an X-ray free-electron laser, are presented, highlighting the facility’s unique capabilities. A general comparison to other major facilities is also provided.

118 citations

Journal ArticleDOI
20 May 2020-Nature
TL;DR: Crystallographic ‘snapshots’ taken at intervals of femtoseconds to milliseconds after activation show how a light-activated sodium pump carries sodium ions across the cell membrane and provide direct molecular insight into the dynamics of active cation transport across biological membranes.
Abstract: Light-driven sodium pumps actively transport small cations across cellular membranes1. These pumps are used by microorganisms to convert light into membrane potential and have become useful optogenetic tools with applications in neuroscience. Although the resting state structures of the prototypical sodium pump Krokinobacter eikastus rhodopsin 2 (KR2) have been solved2,3, it is unclear how structural alterations over time allow sodium to be translocated against a concentration gradient. Here, using the Swiss X-ray Free Electron Laser4, we have collected serial crystallographic data at ten pump-probe delays from femtoseconds to milliseconds. High-resolution structural snapshots throughout the KR2 photocycle show how retinal isomerization is completed on the femtosecond timescale and changes the local structure of the binding pocket in the early nanoseconds. Subsequent rearrangements and deprotonation of the retinal Schiff base open an electrostatic gate in microseconds. Structural and spectroscopic data, in combination with quantum chemical calculations, indicate that a sodium ion binds transiently close to the retinal within one millisecond. In the last structural intermediate, at 20 milliseconds after activation, we identified a potential second sodium-binding site close to the extracellular exit. These results provide direct molecular insight into the dynamics of active cation transport across biological membranes.

94 citations

Journal ArticleDOI
TL;DR: The Free-Electron Laser at DESY (FLASH) as discussed by the authors was the first FEL in the XUV/soft X-ray spectral range, and was for almost 5 years the only short wavelength FEL facility worldwide.

93 citations