1
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Perosa G, Di Mitri S. Matrix model for collective phenomena in electron beam's longitudinal phase space. Sci Rep 2021; 11:7895. [PMID: 33846439 PMCID: PMC8041831 DOI: 10.1038/s41598-021-87041-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 03/23/2021] [Indexed: 11/09/2022] Open
Abstract
The possibility to predict, characterize and minimize the presence of spurious harmonic content in the longitudinal profile of high brightness electron beams, namely the microbunching instability, has become vital to ensure accurate modeling and reliable operation of radiofrequency and plasma-based linear accelerators such as those driving free-electron lasers. Recently, the impact of intrabeam scattering (IBS) on the instability has been experimentally demonstrated by the authors. This work complements that experimental study by extending existing theories in a self-consistent, piece-wise calculation of IBS in single pass linacs and multi-bend transfer lines. New expressions for the IBS are introduced in two different semi-analytical models of microbunching. The accuracy of the proposed models and the range of beam parameters to which they apply is discussed. The overall modeling turns out to be a fast comprehensive tool for the optimization of linac-driven free-electron lasers.
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Affiliation(s)
- Giovanni Perosa
- Dipartimento di Fisica, Università degli Studi di Trieste, Piazzale Europa 1, Trieste, Italy.
| | - Simone Di Mitri
- Dipartimento di Fisica, Università degli Studi di Trieste, Piazzale Europa 1, Trieste, Italy.,Elettra-Sincrotrone Trieste S.C.p.A., S.S. 14-km 163.5 in AREA Science Park, 34149, Basovizza, Trieste, Italy
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2
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Rohringer N. X-ray Raman scattering: a building block for nonlinear spectroscopy. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2019; 377:20170471. [PMID: 30929628 DOI: 10.1098/rsta.2017.0471] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/11/2019] [Indexed: 06/09/2023]
Abstract
Ultraintense X-ray free-electron laser pulses of attosecond duration can enable new nonlinear X-ray spectroscopic techniques to observe coherent electronic motion. The simplest nonlinear X-ray spectroscopic concept is based on stimulated electronic X-ray Raman scattering. We present a snapshot of recent experimental achievements, paving the way towards the goal of realizing nonlinear X-ray spectroscopy. In particular, we review the first proof-of-principle experiments, demonstrating stimulated X-ray emission and scattering in atomic gases in the soft X-ray regime and first results of stimulated hard X-ray emission spectroscopy on transition metal complexes. We critically asses the challenges that have to be overcome for future successful implementation of nonlinear coherent X-ray Raman spectroscopy. This article is part of the theme issue 'Measurement of ultrafast electronic and structural dynamics with X-rays'.
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Affiliation(s)
- Nina Rohringer
- 1 Deutsches Elektronen-Synchrotron (DESY) , 22607 Hamburg , Germany
- 2 Department of Physics , Universität Hamburg , 20355 Hamburg , Germany
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3
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Lemery F, Piot P, Amatuni G, Boonpornprasert P, Chen Y, Good J, Grigoryan B, Groß M, Krasilinikov M, Lishilin O, Loisch G, Oppelt A, Philipp S, Qian H, Renier Y, Stephan F, Zagorodnov I. Passive Ballistic Microbunching of Nonultrarelativistic Electron Bunches Using Electromagnetic Wakefields in Dielectric-Lined Waveguides. PHYSICAL REVIEW LETTERS 2019; 122:044801. [PMID: 30768287 DOI: 10.1103/physrevlett.122.044801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 12/17/2018] [Indexed: 06/09/2023]
Abstract
Temporally modulated electron beams have a wide array of applications ranging from the generation of coherently enhanced electromagnetic radiation to the resonant excitation of electromagnetic wakefields in advanced-accelerator concepts. Likewise producing low-energy ultrashort microbunches could be useful for ultrafast electron diffraction and new accelerator-based light-source concepts. In this Letter we propose and experimentally demonstrate a passive microbunching technique capable of forming a picosecond bunch train at ∼6 MeV. The method relies on the excitation of electromagnetic wakefields as the beam propagates through a dielectric-lined waveguide. Owing to the nonultrarelativistic nature of the beam, the induced energy modulation eventually converts into a density modulation as the beam travels in a following free-space drift. The modulated beam is further accelerated to ∼20 MeV while preserving the imparted density modulation.
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Affiliation(s)
- F Lemery
- Deutsches Elektronen-Synchrotron, Notkestraße 85, 22607 Hamburg, Germany
| | - P Piot
- Northern Illinois Center for Accelerator & Detector Development and Department of Physics, Northern Illinois University, DeKalb Illinois 60115, USA
- Accelerator Physics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - G Amatuni
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
- Center for the Advancement of Natural Discoveries using Light Emission, Yerevan 0040, Armenia
| | - P Boonpornprasert
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - Y Chen
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - J Good
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - B Grigoryan
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
- Center for the Advancement of Natural Discoveries using Light Emission, Yerevan 0040, Armenia
| | - M Groß
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - M Krasilinikov
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - O Lishilin
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - G Loisch
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - A Oppelt
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - S Philipp
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - H Qian
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - Y Renier
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - F Stephan
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - I Zagorodnov
- Deutsches Elektronen-Synchrotron, Notkestraße 85, 22607 Hamburg, Germany
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4
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Zhang Y, Bennett K, Mukamel S. Monitoring Ultrafast Spin Crossover Intermediates in an Iron(II) Complex by Broad Band Stimulated X-ray Raman Spectroscopy. J Phys Chem A 2018; 122:6524-6531. [PMID: 29944375 DOI: 10.1021/acs.jpca.8b01762] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The photoinduced spin crossover dynamics of transition metal complexes is of fundamental scientific importance and is used for sensor device applications and solar energy harvesting. Current X-ray and optical spectroscopy experiments for [FeII(bpy)3], an archetypal earth-abundant metal complex, show conflicting spin dynamics. We have simulated the broad band transient X-ray absorption and hybrid (broad + narrow band) X-ray stimulated Raman signals at the N and Fe K-edges of the key excited state intermediates involved in the spin crossover process of this complex. We find that these signals are much more sensitive to electron and spin populations than transition absorption and may be useful in the design of photovoltaic and artificial photosynthetic systems.
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Affiliation(s)
- Yu Zhang
- Department of Chemistry , University of California , Irvine , California 92697 , United States
| | - Kochise Bennett
- Department of Chemistry , University of California , Irvine , California 92697 , United States
| | - Shaul Mukamel
- Department of Chemistry , University of California , Irvine , California 92697 , United States
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5
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6
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7
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Plath T, Amstutz P, Bödewadt J, Brenner G, Ekanayake N, Faatz B, Hacker K, Honkavaara K, Lazzarino LL, Lechner C, Maltezopoulos T, Scholz M, Schreiber S, Vogt M, Zemella J, Laarmann T. Free-electron laser multiplex driven by a superconducting linear accelerator. JOURNAL OF SYNCHROTRON RADIATION 2016; 23:1070-1075. [PMID: 27577757 DOI: 10.1107/s1600577516009620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 06/14/2016] [Indexed: 06/06/2023]
Abstract
Free-electron lasers (FELs) generate femtosecond XUV and X-ray pulses at peak powers in the gigawatt range. The FEL user facility FLASH at DESY (Hamburg, Germany) is driven by a superconducting linear accelerator with up to 8000 pulses per second. Since 2014, two parallel undulator beamlines, FLASH1 and FLASH2, have been in operation. In addition to the main undulator, the FLASH1 beamline is equipped with an undulator section, sFLASH, dedicated to research and development of fully coherent extreme ultraviolet photon pulses using external seed lasers. In this contribution, the first simultaneous lasing of the three FELs at 13.4 nm, 20 nm and 38.8 nm is presented.
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Affiliation(s)
- Tim Plath
- Department of Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Philipp Amstutz
- Department of Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Jörn Bödewadt
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Günter Brenner
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Nagitha Ekanayake
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Bart Faatz
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Kirsten Hacker
- Technische Universität Dortmund, Fakultät Physik, Otto-Hahn-Strasse 4, 44227 Dortmund, Germany
| | - Katja Honkavaara
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | | | - Christoph Lechner
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | | | - Matthias Scholz
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Siegfried Schreiber
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Mathias Vogt
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Johann Zemella
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Tim Laarmann
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
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8
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Marinelli A, Coffee R, Vetter S, Hering P, West GN, Gilevich S, Lutman AA, Li S, Maxwell T, Galayda J, Fry A, Huang Z. Optical Shaping of X-Ray Free-Electron Lasers. PHYSICAL REVIEW LETTERS 2016; 116:254801. [PMID: 27391728 DOI: 10.1103/physrevlett.116.254801] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Indexed: 05/23/2023]
Abstract
In this Letter we report the experimental demonstration of a new temporal shaping technique for x-ray free-electron lasers (FELs). This technique is based on the use of a spectrally shaped infrared (IR) laser and allows optical control of the x-ray generation process. By accurately manipulating the spectral amplitude and phase of the IR laser, we can selectively modify the electron bunch longitudinal emittance thus controlling the duration of the resulting x-ray pulse down to the femtosecond time scale. Unlike other methods currently in use, optical shaping is directly applicable to the next generation of high-average power x-ray FELs such as the Linac Coherent Light Source-II or the European X-FEL, and it enables pulse shaping of FELs at the highest repetition rates. Furthermore, this laser-shaping technique paves the way for flexible tailoring of complex multicolor FEL pulse patterns required for nonlinear multidimensional x-ray spectroscopy as well as novel multicolor diffraction imaging schemes.
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Affiliation(s)
- A Marinelli
- SLAC National Accelerator Laboratory,2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - R Coffee
- SLAC National Accelerator Laboratory,2575 Sand Hill Road, Menlo Park, California 94025, USA
- The PULSE Institute, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S Vetter
- SLAC National Accelerator Laboratory,2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - P Hering
- SLAC National Accelerator Laboratory,2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - G N West
- Rose-Hulman Institute of Technology, 5500 Wabash Ave., Terre Haute, Indiana 47803, USA
| | - S Gilevich
- SLAC National Accelerator Laboratory,2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - A A Lutman
- SLAC National Accelerator Laboratory,2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S Li
- SLAC National Accelerator Laboratory,2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - T Maxwell
- SLAC National Accelerator Laboratory,2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - J Galayda
- SLAC National Accelerator Laboratory,2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - A Fry
- SLAC National Accelerator Laboratory,2575 Sand Hill Road, Menlo Park, California 94025, USA
- The PULSE Institute, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Z Huang
- SLAC National Accelerator Laboratory,2575 Sand Hill Road, Menlo Park, California 94025, USA
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9
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Gauthier D, Ribič PR, De Ninno G, Allaria E, Cinquegrana P, Danailov MB, Demidovich A, Ferrari E, Giannessi L. Generation of Phase-Locked Pulses from a Seeded Free-Electron Laser. PHYSICAL REVIEW LETTERS 2016; 116:024801. [PMID: 26824544 DOI: 10.1103/physrevlett.116.024801] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Indexed: 05/19/2023]
Abstract
In a coherent control experiment, light pulses are used to guide the real-time evolution of a quantum system. This requires the coherence and the control of the pulses' electric-field carrier waves. In this work, we use frequency-domain interferometry to demonstrate the mutual coherence of time-delayed pulses generated by an extreme ultraviolet seeded free-electron laser. Furthermore, we use the driving seed laser to lock and precisely control the relative phase between the two free-electron laser pulses. This new capability opens the way to a multitude of coherent control experiments, which will take advantage of the high intensity, short wavelength, and short duration of the pulses generated by seeded free-electron lasers.
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Affiliation(s)
- David Gauthier
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
| | - Primož Rebernik Ribič
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
| | - Giovanni De Ninno
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
- Laboratory of Quantum Optics, University of Nova Gorica, 5001 Nova Gorica, Slovenia
| | - Enrico Allaria
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
| | - Paolo Cinquegrana
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
| | | | - Alexander Demidovich
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
| | - Eugenio Ferrari
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
- Università degli Studi di Trieste, Dipartimento di Fisica, Piazzale Europa 1, 34100 Trieste, Italy
| | - Luca Giannessi
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
- Theory Group ENEA Frascati, Via Enrico Fermi 45, 00044 Frascati, Italy
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