1
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Funkner S, Niehues G, Nasse MJ, Bründermann E, Caselle M, Kehrer B, Rota L, Schönfeldt P, Schuh M, Steffen B, Steinmann JL, Weber M, Müller AS. Revealing the dynamics of ultrarelativistic non-equilibrium many-electron systems with phase space tomography. Sci Rep 2023; 13:4618. [PMID: 36944670 PMCID: PMC10030633 DOI: 10.1038/s41598-023-31196-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 03/07/2023] [Indexed: 03/23/2023] Open
Abstract
The description of physical processes with many-particle systems is a key approach to the modeling of numerous physical systems. For example in storage rings, where ultrarelativistic particles are agglomerated in dense bunches, the modeling and measurement of their phase-space distribution is of paramount importance: at any time the phase-space distribution not only determines the complete space-time evolution but also provides fundamental performance characteristics for storage ring operation. Here, we demonstrate a non-destructive tomographic imaging technique for the 2D longitudinal phase-space distribution of ultrarelativistic electron bunches. For this purpose, we utilize a unique setup, which streams turn-by-turn near-field measurements of bunch profiles at MHz repetition rates. To demonstrate the feasibility of our method, we induce a non-equilibrium state and show that the phase-space distribution microstructuring as well as the phase-space distribution dynamics can be observed in great detail. Our approach offers a pathway to control ultrashort bunches and supports, as one example, the development of compact accelerators with low energy footprints.
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Affiliation(s)
- Stefan Funkner
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany.
| | - Gudrun Niehues
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Michael J Nasse
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Erik Bründermann
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Michele Caselle
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Benjamin Kehrer
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Lorenzo Rota
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
- SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Patrik Schönfeldt
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
- DLR (Deutsches Zentrum für Luft und Raumfahrt) Institute of Networked Energy Systems, Carl-von-Ossietzky-Str.15, 26129, Oldenburg, Germany
| | - Marcel Schuh
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Bernd Steffen
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany
| | | | - Marc Weber
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
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2
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Grigoryan L, Mkrtchyan A, Dabagov S, Saharian A, Kocharyan V, Kotanjyan V, Harutyunyan H, Khachatryan H. Coherent radiation from a chain of charged particles on a circular orbit around a dielectric ball. Radiat Phys Chem Oxf Engl 1993 2023. [DOI: 10.1016/j.radphyschem.2023.110791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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3
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Rössle M, Leitenberger W, Reinhardt M, Koç A, Pudell J, Kwamen C, Bargheer M. The time-resolved hard X-ray diffraction endstation KMC-3 XPP at BESSY II. JOURNAL OF SYNCHROTRON RADIATION 2021; 28:948-960. [PMID: 33950003 PMCID: PMC8127367 DOI: 10.1107/s1600577521002484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 03/05/2021] [Indexed: 06/07/2023]
Abstract
The time-resolved hard X-ray diffraction endstation KMC-3 XPP for optical pump/X-ray probe experiments at the electron storage ring BESSY II is dedicated to investigating the structural response of thin film samples and heterostructures after their excitation with ultrashort laser pulses and/or electric field pulses. It enables experiments with access to symmetric and asymmetric Bragg reflections via a four-circle diffractometer and it is possible to keep the sample in high vacuum and vary the sample temperature between ∼15 K and 350 K. The femtosecond laser system permanently installed at the beamline allows for optical excitation of the sample at 1028 nm. A non-linear optical setup enables the sample excitation also at 514 nm and 343 nm. A time-resolution of 17 ps is achieved with the `low-α' operation mode of the storage ring and an electronic variation of the delay between optical pump and hard X-ray probe pulse conveniently accesses picosecond to microsecond timescales. Direct time-resolved detection of the diffracted hard X-ray synchrotron pulses use a gated area pixel detector or a fast point detector in single photon counting mode. The range of experiments that are reliably conducted at the endstation and that detect structural dynamics of samples excited by laser pulses or electric fields are presented.
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Affiliation(s)
- Matthias Rössle
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Wolfram Leitenberger
- Institut für Physik and Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24–25, 14476 Potsdam, Germany
| | - Matthias Reinhardt
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Azize Koç
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Jan Pudell
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Christelle Kwamen
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Matias Bargheer
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
- Institut für Physik and Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24–25, 14476 Potsdam, Germany
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4
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Hwang JG, Schiwietz G, Abo-Bakr M, Atkinson T, Ries M, Goslawski P, Klemz G, Müller R, Schälicke A, Jankowiak A. Generation of intense and coherent sub-femtosecond X-ray pulses in electron storage rings. Sci Rep 2020; 10:10093. [PMID: 32572105 PMCID: PMC7308344 DOI: 10.1038/s41598-020-67027-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 06/02/2020] [Indexed: 11/17/2022] Open
Abstract
Temporally short X-ray pulses are an indispensable tool for the study of electron transitions close to the Fermi energy and structural changes in molecules undergoing chemical reactions which take place on a time-scale of hundreds of femtoseconds. The time resolution of experiments at 3rd generation light sources which produce intense synchrotron radiation is limited fundamentally by the electron-bunch length in the range of tens of picoseconds. Here we propose a new scheme for the generation of intense and coherent sub-femtoseconds soft X-ray pulses in storage rings by applying the Echo-Enabled Harmonic Generation (EEHG) method. Many issues for obtaining the EEHG structure such as two modulators and a radiator are solved by a paradigm shift in an achromatic storage ring cell. Numerical demonstration of the feasibility of the scheme for the BESSY II beam parameters is presented.
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Affiliation(s)
- J-G Hwang
- Helmholtz-Zentrum Berlin (HZB), Albert-Einstein Straße 15, Berlin, 12489, Germany.
| | - G Schiwietz
- Helmholtz-Zentrum Berlin (HZB), Albert-Einstein Straße 15, Berlin, 12489, Germany
| | - M Abo-Bakr
- Helmholtz-Zentrum Berlin (HZB), Albert-Einstein Straße 15, Berlin, 12489, Germany
| | - T Atkinson
- Helmholtz-Zentrum Berlin (HZB), Albert-Einstein Straße 15, Berlin, 12489, Germany
| | - M Ries
- Helmholtz-Zentrum Berlin (HZB), Albert-Einstein Straße 15, Berlin, 12489, Germany
| | - P Goslawski
- Helmholtz-Zentrum Berlin (HZB), Albert-Einstein Straße 15, Berlin, 12489, Germany
| | - G Klemz
- Helmholtz-Zentrum Berlin (HZB), Albert-Einstein Straße 15, Berlin, 12489, Germany
| | - R Müller
- Helmholtz-Zentrum Berlin (HZB), Albert-Einstein Straße 15, Berlin, 12489, Germany
| | - A Schälicke
- Helmholtz-Zentrum Berlin (HZB), Albert-Einstein Straße 15, Berlin, 12489, Germany
| | - A Jankowiak
- Helmholtz-Zentrum Berlin (HZB), Albert-Einstein Straße 15, Berlin, 12489, Germany
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5
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Abstract
Coherent synchrotron radiation from an electron storage ring is observed in the THz spectral range when the bunch length is shortened down to the sub-mm-range. With increasing stored current, the bunch becomes longitudinally unstable and modulates the THz emission in the time domain. These micro-instabilities are investigated at the electron storage ring BESSY II by means of cross-correlation of the THz fields from successive bunches. The investigations allow deriving the longitudinal length scale of the micro bunch fluctuations and show that it grows faster than the current-dependent bunch length. Our findings will help to set the limits for the possible time resolution for pump-probe experiments achieved with coherent THz synchrotron radiation from a storage ring.
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6
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From self-organization in relativistic electron bunches to coherent synchrotron light: observation using a photonic time-stretch digitizer. Sci Rep 2019; 9:10391. [PMID: 31316080 PMCID: PMC6637151 DOI: 10.1038/s41598-019-45024-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 05/15/2019] [Indexed: 11/16/2022] Open
Abstract
In recent and future synchrotron radiation facilities, relativistic electron bunches with increasingly high charge density are needed for producing brilliant light at various wavelengths, from X-rays to terahertz. In such conditions, interaction of electron bunches with their own emitted electromagnetic fields leads to instabilities and spontaneous formation of complex spatial structures. Understanding these instabilities is therefore key in most electron accelerators. However, investigations suffer from the lack of non-destructive recording tools for electron bunch shapes. In storage rings, most studies thus focus on the resulting emitted radiation. Here, we present measurements of the electric field in the immediate vicinity of the electron bunch in a storage ring, over many turns. For recording the ultrafast electric field, we designed a photonic time-stretch analog-to-digital converter with terasamples/second acquisition rate. We could thus observe the predicted link between spontaneous pattern formation and giant bursts of coherent synchrotron radiation in a storage ring.
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7
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Schoenlein R, Elsaesser T, Holldack K, Huang Z, Kapteyn H, Murnane M, Woerner M. Recent advances in ultrafast X-ray sources. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2019; 377:20180384. [PMID: 30929633 DOI: 10.1098/rsta.2018.0384] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Over more than a century, X-rays have transformed our understanding of the fundamental structure of matter and have been an indispensable tool for chemistry, physics, biology, materials science and related fields. Recent advances in ultrafast X-ray sources operating in the femtosecond to attosecond regimes have opened an important new frontier in X-ray science. These advances now enable: (i) sensitive probing of structural dynamics in matter on the fundamental timescales of atomic motion, (ii) element-specific probing of electronic structure and charge dynamics on fundamental timescales of electronic motion, and (iii) powerful new approaches for unravelling the coupling between electronic and atomic structural dynamics that underpin the properties and function of matter. Most notable is the recent realization of X-ray free-electron lasers (XFELs) with numerous new XFEL facilities in operation or under development worldwide. Advances in XFELs are complemented by advances in synchrotron-based and table-top laser-plasma X-ray sources now operating in the femtosecond regime, and laser-based high-order harmonic XUV sources operating in the attosecond regime. This article is part of the theme issue 'Measurement of ultrafast electronic and structural dynamics with X-rays'.
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Affiliation(s)
- Robert Schoenlein
- 1 SLAC National Accelerator Laboratory , 2575 Sand Hill Road, Menlo Park, CA 94025 , USA
| | - Thomas Elsaesser
- 2 Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie , 12489 Berlin , Germany
| | - Karsten Holldack
- 3 Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Albert-Einstein-Strasse 15, 12489 Berlin , Germany
| | - Zhirong Huang
- 1 SLAC National Accelerator Laboratory , 2575 Sand Hill Road, Menlo Park, CA 94025 , USA
| | - Henry Kapteyn
- 4 Department of Physics and JILA, University of Colorado , Boulder, CO 80309-0440 , USA
| | - Margaret Murnane
- 4 Department of Physics and JILA, University of Colorado , Boulder, CO 80309-0440 , USA
| | - Michael Woerner
- 2 Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie , 12489 Berlin , Germany
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8
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Coherent THz Emission Enhanced by Coherent Synchrotron Radiation Wakefield. Sci Rep 2018; 8:11661. [PMID: 30076346 PMCID: PMC6076281 DOI: 10.1038/s41598-018-30125-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 07/25/2018] [Indexed: 11/08/2022] Open
Abstract
We demonstrate that emission of coherent transition radiation by a ∼1 GeV energy-electron beam passing through an Al foil is enhanced in intensity and extended in frequency spectral range, by the energy correlation established along the beam by coherent synchrotron radiation wakefield, in the presence of a proper electron optics in the beam delivery system. Analytical and numerical models, based on experimental electron beam parameters collected at the FERMI free electron laser (FEL), predict transition radiation with two intensity peaks at ∼0.3 THz and ∼1.5 THz, and extending up to 8.5 THz with intensity above 20 dB w.r.t. the main peak. Up to 80-µJ pulse energy integrated over the full bandwidth is expected at the source, and in agreement with experimental pulse energy measurements. By virtue of its implementation in an FEL beam dump line, this work promises dissemination of user-oriented multi-THz beamlines parasitic and self-synchronized to EUV and x-ray FELs.
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9
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Evain C, Roussel E, Le Parquier M, Szwaj C, Tordeux MA, Brubach JB, Manceron L, Roy P, Bielawski S. Direct Observation of Spatiotemporal Dynamics of Short Electron Bunches in Storage Rings. PHYSICAL REVIEW LETTERS 2017; 118:054801. [PMID: 28211708 DOI: 10.1103/physrevlett.118.054801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Indexed: 05/23/2023]
Abstract
In recent synchrotron radiation facilities, the use of short (picosecond) electron bunches is a powerful method for producing giant pulses of terahertz coherent synchrotron radiation. Here we report on the first direct observation of these pulse shapes with a few picoseconds resolution, and of their dynamics over a long time. We thus confirm in a very direct way the theories predicting an interplay between two physical processes. Below a critical bunch charge, we observe a train of identical THz pulses (a broadband Terahertz comb) stemming from the shortness of the electron bunches. Above this threshold, a large part of the emission is dominated by drifting structures, which appear through spontaneous self-organization. These challenging single-shot THz recordings are made possible by using a recently developed photonic time stretch detector with a high sensitivity. The experiment has been realized at the SOLEIL storage ring.
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Affiliation(s)
- C Evain
- Laboratoire de Physique des Lasers, Atomes et Molécules, UMR CNRS 8523 Centre d'Études et de Recherches Lasers et Applications, FR CNRS 2416, Université des Sciences et Technologies de Lille, F-59655 Villeneuve d'Ascq Cedex, France
| | - E Roussel
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5 in AREA Science Park,34149 Basovizza, Trieste, Italy
| | - M Le Parquier
- Laboratoire de Physique des Lasers, Atomes et Molécules, UMR CNRS 8523 Centre d'Études et de Recherches Lasers et Applications, FR CNRS 2416, Université des Sciences et Technologies de Lille, F-59655 Villeneuve d'Ascq Cedex, France
| | - C Szwaj
- Laboratoire de Physique des Lasers, Atomes et Molécules, UMR CNRS 8523 Centre d'Études et de Recherches Lasers et Applications, FR CNRS 2416, Université des Sciences et Technologies de Lille, F-59655 Villeneuve d'Ascq Cedex, France
| | - M-A Tordeux
- Synchrotron SOLEIL, Saint Aubin, BP 34, 91192 Gif-sur-Yvette, France
| | - J-B Brubach
- Synchrotron SOLEIL, Saint Aubin, BP 34, 91192 Gif-sur-Yvette, France
| | - L Manceron
- Synchrotron SOLEIL, Saint Aubin, BP 34, 91192 Gif-sur-Yvette, France
| | - P Roy
- Synchrotron SOLEIL, Saint Aubin, BP 34, 91192 Gif-sur-Yvette, France
| | - S Bielawski
- Laboratoire de Physique des Lasers, Atomes et Molécules, UMR CNRS 8523 Centre d'Études et de Recherches Lasers et Applications, FR CNRS 2416, Université des Sciences et Technologies de Lille, F-59655 Villeneuve d'Ascq Cedex, France
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10
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Low frequency piezoresonance defined dynamic control of terahertz wave propagation. Sci Rep 2016; 6:38041. [PMID: 27901070 PMCID: PMC5128798 DOI: 10.1038/srep38041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 11/04/2016] [Indexed: 12/02/2022] Open
Abstract
Phase modulators are one of the key components of many applications in electromagnetic and opto-electric wave propagations. Phase-shifters play an integral role in communications, imaging and in coherent material excitations. In order to realize the terahertz (THz) electromagnetic spectrum as a fully-functional bandwidth, the development of a family of efficient THz phase modulators is needed. Although there have been quite a few attempts to implement THz phase modulators based on quantum-well structures, liquid crystals, or meta-materials, significantly improved sensitivity and dynamic control for phase modulation, as we believe can be enabled by piezoelectric-resonance devices, is yet to be investigated. In this article we provide an experimental demonstration of phase modulation of THz beam by operating a ferroelectric single crystal LiNbO3 film device at the piezo-resonance. The piezo-resonance, excited by an external a.c. electric field, develops a coupling between electromagnetic and lattice-wave and this coupling governs the wave propagation of the incident THz beam by modulating its phase transfer function. We report the understanding developed in this work can facilitate the design and fabrication of a family of resonance-defined highly sensitive and extremely low energy sub-millimeter wave sensors and modulators.
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11
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Stepanov AG, Hauri CP. Short X-ray pulses from third-generation light sources. JOURNAL OF SYNCHROTRON RADIATION 2016; 23:141-151. [PMID: 26698056 DOI: 10.1107/s1600577515019281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 10/12/2015] [Indexed: 06/05/2023]
Abstract
High-brightness X-ray radiation produced by third-generation synchrotron light sources (TGLS) has been used for numerous time-resolved investigations in many different scientific fields. The typical time duration of X-ray pulses delivered by these large-scale machines is about 50-100 ps. A growing number of time-resolved studies would benefit from X-ray pulses with two or three orders of magnitude shorter duration. Here, techniques explored in the past for shorter X-ray pulse emission at TGLS are reviewed and the perspective towards the realisation of picosecond and sub-picosecond X-ray pulses are discussed.
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Affiliation(s)
- A G Stepanov
- Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - C P Hauri
- Paul Scherrer Institute, 5232 Villigen, Switzerland
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12
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Roussel E, Evain C, Le Parquier M, Szwaj C, Bielawski S, Manceron L, Brubach JB, Tordeux MA, Ricaud JP, Cassinari L, Labat M, Couprie ME, Roy P. Observing microscopic structures of a relativistic object using a time-stretch strategy. Sci Rep 2015; 5:10330. [PMID: 26020859 PMCID: PMC4446994 DOI: 10.1038/srep10330] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 04/08/2015] [Indexed: 11/23/2022] Open
Abstract
Emission of light by a single electron moving on a curved trajectory (synchrotron radiation) is one of the most well-known fundamental radiation phenomena. However experimental situations are more complex as they involve many electrons, each being exposed to the radiation of its neighbors. This interaction has dramatic consequences, one of the most spectacular being the spontaneous formation of spatial structures inside electrons bunches. This fundamental effect is actively studied as it represents one of the most fundamental limitations in electron accelerators, and at the same time a source of intense terahertz radiation (Coherent Synchrotron Radiation, or CSR). Here we demonstrate the possibility to directly observe the electron bunch microstructures with subpicosecond resolution, in a storage ring accelerator. The principle is to monitor the terahertz pulses emitted by the structures, using a strategy from photonics, time-stretch, consisting in slowing-down the phenomena before recording. This opens the way to unpreceeded possibilities for analyzing and mastering new generation high power coherent synchrotron sources.
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Affiliation(s)
- E Roussel
- 1] Laboratoire PhLAM, UMR CNRS 8523, Université Lille 1, Sciences et Technologies, 59655 Villeneuve d'Ascq, France [2] Centre d'Etudes et de Recherches Lasers et Applications (CERLA), 59655 Villeneuve d'Ascq, France
| | - C Evain
- 1] Laboratoire PhLAM, UMR CNRS 8523, Université Lille 1, Sciences et Technologies, 59655 Villeneuve d'Ascq, France [2] Centre d'Etudes et de Recherches Lasers et Applications (CERLA), 59655 Villeneuve d'Ascq, France
| | - M Le Parquier
- Centre d'Etudes et de Recherches Lasers et Applications (CERLA), 59655 Villeneuve d'Ascq, France
| | - C Szwaj
- 1] Laboratoire PhLAM, UMR CNRS 8523, Université Lille 1, Sciences et Technologies, 59655 Villeneuve d'Ascq, France [2] Centre d'Etudes et de Recherches Lasers et Applications (CERLA), 59655 Villeneuve d'Ascq, France
| | - S Bielawski
- 1] Laboratoire PhLAM, UMR CNRS 8523, Université Lille 1, Sciences et Technologies, 59655 Villeneuve d'Ascq, France [2] Centre d'Etudes et de Recherches Lasers et Applications (CERLA), 59655 Villeneuve d'Ascq, France
| | - L Manceron
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - J-B Brubach
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - M-A Tordeux
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - J-P Ricaud
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - L Cassinari
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - M Labat
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - M-E Couprie
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - P Roy
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
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13
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Roussel E, Evain C, Szwaj C, Bielawski S, Raasch J, Thoma P, Scheuring A, Hofherr M, Ilin K, Wünsch S, Siegel M, Hosaka M, Yamamoto N, Takashima Y, Zen H, Konomi T, Adachi M, Kimura S, Katoh M. Microbunching instability in relativistic electron bunches: direct observations of the microstructures using ultrafast YBCO detectors. PHYSICAL REVIEW LETTERS 2014; 113:094801. [PMID: 25215987 DOI: 10.1103/physrevlett.113.094801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Indexed: 06/03/2023]
Abstract
Relativistic electron bunches circulating in accelerators are subjected to a dynamical instability leading to microstructures at millimeter to centimeter scale. Although this is a well-known fact, direct experimental observations of the structures, or the field that they emit, remained up to now an open problem. Here, we report the direct, shot-by-shot, time-resolved recording of the shapes (including envelope and carrier) of the pulses of coherent synchrotron radiation that are emitted, and that are a "signature" of the electron bunch microstructure. The experiments are performed on the UVSOR-III storage ring, using electrical field sensitive YBa2Cu3O(7-x) thin-film ultrafast detectors. The observed patterns are subjected to permanent drifts, that can be explained from a reasoning in phase space, using macroparticle simulations.
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Affiliation(s)
- E Roussel
- Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), UMR CNRS 8523, Centre d'Études et de Recherches Lasers et Applications (CERLA), Université Lille 1, F-59655 Villeneuve d'Ascq Cedex, France
| | - C Evain
- Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), UMR CNRS 8523, Centre d'Études et de Recherches Lasers et Applications (CERLA), Université Lille 1, F-59655 Villeneuve d'Ascq Cedex, France
| | - C Szwaj
- Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), UMR CNRS 8523, Centre d'Études et de Recherches Lasers et Applications (CERLA), Université Lille 1, F-59655 Villeneuve d'Ascq Cedex, France
| | - S Bielawski
- Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), UMR CNRS 8523, Centre d'Études et de Recherches Lasers et Applications (CERLA), Université Lille 1, F-59655 Villeneuve d'Ascq Cedex, France
| | - J Raasch
- Institute of Micro- and Nanoelectronic Systems, Karlsruhe Institute of Technology (KIT), 76187 Karlsruhe, Germany
| | - P Thoma
- Institute of Micro- and Nanoelectronic Systems, Karlsruhe Institute of Technology (KIT), 76187 Karlsruhe, Germany
| | - A Scheuring
- Institute of Micro- and Nanoelectronic Systems, Karlsruhe Institute of Technology (KIT), 76187 Karlsruhe, Germany
| | - M Hofherr
- Institute of Micro- and Nanoelectronic Systems, Karlsruhe Institute of Technology (KIT), 76187 Karlsruhe, Germany
| | - K Ilin
- Institute of Micro- and Nanoelectronic Systems, Karlsruhe Institute of Technology (KIT), 76187 Karlsruhe, Germany
| | - S Wünsch
- Institute of Micro- and Nanoelectronic Systems, Karlsruhe Institute of Technology (KIT), 76187 Karlsruhe, Germany
| | - M Siegel
- Institute of Micro- and Nanoelectronic Systems, Karlsruhe Institute of Technology (KIT), 76187 Karlsruhe, Germany
| | - M Hosaka
- Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - N Yamamoto
- Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Y Takashima
- Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - H Zen
- Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan
| | - T Konomi
- UVSOR Facility, Institute for Molecular Science, National Institutes of Natural Sciences, Okazaki 444-8585, Japan
| | - M Adachi
- UVSOR Facility, Institute for Molecular Science, National Institutes of Natural Sciences, Okazaki 444-8585, Japan
| | - S Kimura
- UVSOR Facility, Institute for Molecular Science, National Institutes of Natural Sciences, Okazaki 444-8585, Japan
| | - M Katoh
- UVSOR Facility, Institute for Molecular Science, National Institutes of Natural Sciences, Okazaki 444-8585, Japan
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15
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Gaal P, Schick D, Herzog M, Bojahr A, Shayduk R, Goldshteyn J, Leitenberger W, Vrejoiu I, Khakhulin D, Wulff M, Bargheer M. Ultrafast switching of hard X-rays. JOURNAL OF SYNCHROTRON RADIATION 2014; 21:380-385. [PMID: 24562559 DOI: 10.1107/s1600577513031949] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Accepted: 11/22/2013] [Indexed: 06/03/2023]
Abstract
A new concept for shortening hard X-ray pulses emitted from a third-generation synchrotron source down to few picoseconds is presented. The device, called the PicoSwitch, exploits the dynamics of coherent acoustic phonons in a photo-excited thin film. A characterization of the structure demonstrates switching times of ≤ 5 ps and a peak reflectivity of ∼10(-3). The device is tested in a real synchrotron-based pump-probe experiment and reveals features of coherent phonon propagation in a second thin film sample, thus demonstrating the potential to significantly improve the temporal resolution at existing synchrotron facilities.
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Affiliation(s)
- Peter Gaal
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Daniel Schick
- Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - Marc Herzog
- Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - André Bojahr
- Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - Roman Shayduk
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Jevgeni Goldshteyn
- Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - Wolfram Leitenberger
- Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - Ionela Vrejoiu
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany
| | - Dmitry Khakhulin
- European Synchrotron Radiation Facility (ESRF), 6 rue Jules Horowitz, 38000 Grenoble, France
| | - Michael Wulff
- European Synchrotron Radiation Facility (ESRF), 6 rue Jules Horowitz, 38000 Grenoble, France
| | - Matias Bargheer
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
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16
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Jankowiak A, Wüstefeld G. Low-α Operation of BESSY II and Future Plans for an Alternating Bunch Length Scheme BESSYVSR. ACTA ACUST UNITED AC 2013. [DOI: 10.1080/08940886.2013.791212] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Issenmann D, Ibrahimkutty S, Steininger R, Göttlicher J, Baumbach T, Hiller N, Müller AS, Plech A. Ultrafast laser pump X-ray probe experiments by means of asynchronous sampling. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/425/9/092007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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18
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Barros J, Evain C, Manceron L, Brubach JB, Tordeux MA, Brunelle P, Nadolski L, Loulergue A, Couprie ME, Bielawski S, Szwaj C, Roy P. Coherent synchrotron radiation for broadband terahertz spectroscopy. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:033102. [PMID: 23556802 DOI: 10.1063/1.4793558] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We present the first high resolution (10(-3) cm(-1)) interferometric measurements in the 200-750 GHz range using coherent synchrotron radiation, achieved with a low momentum compaction factor. The effect of microbunching on spectra is shown, depending on the bunch current. A high signal-to-noise ratio is reached thanks to an artifact correction system based on a double detection scheme. Combined to the broad emitted spectral range and high flux (up to 10(5) times the incoherent radiation), this study demonstrates that coherent synchrotron radiation can now be used for stability-demanding applications, such as gas-phase studies of unstable molecules.
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Affiliation(s)
- J Barros
- Synchrotron SOLEIL, Saint Aubin, BP 48, 91192 Gif-sur-Yvette, Cedex, France
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19
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Chiadroni E, Bellaveglia M, Calvani P, Castellano M, Catani L, Cianchi A, Di Pirro G, Ferrario M, Gatti G, Limaj O, Lupi S, Marchetti B, Mostacci A, Pace E, Palumbo L, Ronsivalle C, Pompili R, Vaccarezza C. Characterization of the THz radiation source at the Frascati linear accelerator. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:022703. [PMID: 23464185 DOI: 10.1063/1.4790429] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The linac driven coherent THz radiation source at the SPARC-LAB test facility is able to deliver broadband THz pulses with femtosecond shaping. In addition, high peak power, narrow spectral bandwidth THz radiation can be also generated, taking advantage of advanced electron beam manipulation techniques, able to generate an adjustable train of electron bunches with a sub-picosecond length and with sub-picosecond spacing. The paper reports on the manipulation, characterization, and transport of the electron beam in the bending line transporting the beam down to the THz station, where different coherent transition radiation spectra have been measured and studied with the aim to optimize the THz radiation performances.
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Far-IR/THz spectral characterization of the coherent synchrotron radiation emission at diamond IR beamline B22. RENDICONTI LINCEI-SCIENZE FISICHE E NATURALI 2011. [DOI: 10.1007/s12210-011-0149-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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22
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Arenas DJ, Shim D, Koukis DI, Seok E, Tanner DB, O KK. Characterization of near-terahertz complementary metal-oxide semiconductor circuits using a Fourier-transform interferometer. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2011; 82:103106. [PMID: 22047279 DOI: 10.1063/1.3647223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Optical methods for measuring of the emission spectra of oscillator circuits operating in the 400-600 GHz range are described. The emitted power from patch antennas included in the circuits is measured by placing the circuit in the source chamber of a Fourier-transform interferometric spectrometer. The results show that this optical technique is useful for measuring circuits pushing the frontier in operating frequency. The technique also allows the characterization of the circuit by measuring the power radiated in the fundamental and in the harmonics. This capability is useful for oscillator architectures designed to cancel the fundamental and use higher harmonics. The radiated power was measured using two techniques: direct measurement of the power by placing the device in front of a bolometer of known responsivity, and by comparison to the estimated power from blackbody sources. The latter technique showed that these circuits have higher emission than blackbody sources at the operating frequencies, and, therefore, offer potential spectroscopy applications.
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Affiliation(s)
- D J Arenas
- Department of Physics, University of North Florida, Jacksonville, Florida 32254, USA
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23
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Ibrahimkutty S, Issenmann D, Schleef S, Müller AS, Mathis YL, Gasharova B, Huttel E, Steininger R, Göttlicher J, Baumbach T, Bartels A, Janke C, Plech A. Asynchronous sampling for ultrafast experiments with low momentum compaction at the ANKA ring. JOURNAL OF SYNCHROTRON RADIATION 2011; 18:539-545. [PMID: 21685668 DOI: 10.1107/s0909049511018267] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Accepted: 05/13/2011] [Indexed: 05/30/2023]
Abstract
A high-repetition-rate pump-probe experiment is presented, based on the asynchronous sampling approach. The low-α mode at the synchrotron ANKA can be used for a time resolution down to the picosecond limit for the time-domain sampling of the coherent THz emission as well as for hard X-ray pump-probe experiments, which probe structural dynamics in the condensed phase. It is shown that a synchronization of better than 1 ps is achieved, and examples of phonon dynamics of semiconductors are presented.
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Affiliation(s)
- Shyjumon Ibrahimkutty
- Institute for Synchrotron Radiation, Karlsruhe Institute of Technology, Karlsruhe, Germany
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24
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Dreiser J, Schnegg A, Holldack K, Pedersen KS, Schau-Magnussen M, Nehrkorn J, Tregenna-Piggott P, Mutka H, Weihe H, Bendix J, Waldmann O. Frequency-Domain Fourier-Transform Terahertz Spectroscopy of the Single-Molecule Magnet (NEt4)[Mn2(5-Brsalen)2(MeOH)2Cr(CN)6]. Chemistry 2011; 17:7492-8. [DOI: 10.1002/chem.201100581] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Indexed: 11/08/2022]
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25
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Wietstruk M, Melnikov A, Stamm C, Kachel T, Pontius N, Sultan M, Gahl C, Weinelt M, Dürr HA, Bovensiepen U. Hot-electron-driven enhancement of spin-lattice coupling in Gd and Tb 4f ferromagnets observed by femtosecond x-ray magnetic circular dichroism. PHYSICAL REVIEW LETTERS 2011; 106:127401. [PMID: 21517350 DOI: 10.1103/physrevlett.106.127401] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2010] [Indexed: 05/30/2023]
Abstract
Femtosecond x-ray magnetic circular dichroism was used to study the time-dependent magnetic moment of 4f electrons in the ferromagnets Gd and Tb, which are known for their different spin-lattice coupling. We observe a two-step demagnetization with an ultrafast demagnetization time of 750 fs identical for both systems and slower times which differ sizeably with 40 ps for Gd and 8 ps for Tb. We conclude that spin-lattice coupling in the electronically excited state is enhanced up to 50 times compared to equilibrium.
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Affiliation(s)
- Marko Wietstruk
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
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26
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Marcelli A, Cinque G. Infrared Synchrotron Radiation Beamlines: High Brilliance Tools for IR Spectromicroscopy. BIOMEDICAL APPLICATIONS OF SYNCHROTRON INFRARED MICROSPECTROSCOPY 2010. [DOI: 10.1039/9781849731997-00067] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Augusto Marcelli
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati Via Enrico Fermi 40, I-00044 Frascati Italy
| | - Gianfelice Cinque
- Diamond Light Source, Harwell Science and Innovation Campus Chilton Didcot Oxon OX11 ODE UK
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27
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Shimada M, Katoh M, Adachi M, Tanikawa T, Kimura S, Hosaka M, Yamamoto N, Takashima Y, Takahashi T. Transverse-longitudinal coupling effect in laser bunch slicing. PHYSICAL REVIEW LETTERS 2009; 103:144802. [PMID: 19905574 DOI: 10.1103/physrevlett.103.144802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2009] [Indexed: 05/28/2023]
Abstract
We report turn-by-turn observation of coherent synchrotron radiation (CSR) produced by the laser bunch slicing technique at an electron storage ring operated with a small momentum compaction factor. CSR emission was intermittent, and its interval depended strongly on the betatron tune. This peculiar behavior of the CSR could be interpreted as a result of coupling between the transverse and longitudinal motion of the electrons. This is the first observation of such an effect, which would be important not only for controlling the CSR emission but also for generating and transporting ultrashort electron bunches or electron bunches with microdensity structures in advanced accelerators.
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Affiliation(s)
- M Shimada
- High Energy Accelerator Research Organization, KEK, Tsukuba, 305-0801, Japan.
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28
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Innocenzi P, Malfatti L, Piccinini M, Sali D, Schade U, Marcelli A. Application of Terahertz Spectroscopy to Time-Dependent Chemical-Physical Phenomena. J Phys Chem A 2009; 113:9418-23. [DOI: 10.1021/jp902502z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Plinio Innocenzi
- Laboratorio di Scienza dei Materiali e Nanotecnologie, D.A.P., Università di Sassari, CR-INSTM, Palazzo Pou Salid, Piazza Duomo 6, 07041 Alghero (Sassari), Italy; Bruker Optics, s.r.l., Via Pascoli 70/3, 20133 Milano, Italy; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Elektronenspeicherring BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany; and INFN-Laboratori Nazionali di Frascati, Via E. Fermi 40, 00044, Frascati, Italy
| | - Luca Malfatti
- Laboratorio di Scienza dei Materiali e Nanotecnologie, D.A.P., Università di Sassari, CR-INSTM, Palazzo Pou Salid, Piazza Duomo 6, 07041 Alghero (Sassari), Italy; Bruker Optics, s.r.l., Via Pascoli 70/3, 20133 Milano, Italy; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Elektronenspeicherring BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany; and INFN-Laboratori Nazionali di Frascati, Via E. Fermi 40, 00044, Frascati, Italy
| | - Massimo Piccinini
- Laboratorio di Scienza dei Materiali e Nanotecnologie, D.A.P., Università di Sassari, CR-INSTM, Palazzo Pou Salid, Piazza Duomo 6, 07041 Alghero (Sassari), Italy; Bruker Optics, s.r.l., Via Pascoli 70/3, 20133 Milano, Italy; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Elektronenspeicherring BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany; and INFN-Laboratori Nazionali di Frascati, Via E. Fermi 40, 00044, Frascati, Italy
| | - Diego Sali
- Laboratorio di Scienza dei Materiali e Nanotecnologie, D.A.P., Università di Sassari, CR-INSTM, Palazzo Pou Salid, Piazza Duomo 6, 07041 Alghero (Sassari), Italy; Bruker Optics, s.r.l., Via Pascoli 70/3, 20133 Milano, Italy; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Elektronenspeicherring BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany; and INFN-Laboratori Nazionali di Frascati, Via E. Fermi 40, 00044, Frascati, Italy
| | - Ulrich Schade
- Laboratorio di Scienza dei Materiali e Nanotecnologie, D.A.P., Università di Sassari, CR-INSTM, Palazzo Pou Salid, Piazza Duomo 6, 07041 Alghero (Sassari), Italy; Bruker Optics, s.r.l., Via Pascoli 70/3, 20133 Milano, Italy; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Elektronenspeicherring BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany; and INFN-Laboratori Nazionali di Frascati, Via E. Fermi 40, 00044, Frascati, Italy
| | - Augusto Marcelli
- Laboratorio di Scienza dei Materiali e Nanotecnologie, D.A.P., Università di Sassari, CR-INSTM, Palazzo Pou Salid, Piazza Duomo 6, 07041 Alghero (Sassari), Italy; Bruker Optics, s.r.l., Via Pascoli 70/3, 20133 Milano, Italy; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Elektronenspeicherring BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany; and INFN-Laboratori Nazionali di Frascati, Via E. Fermi 40, 00044, Frascati, Italy
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29
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Lee SY, Jing YC, Luo T, Pang X, Wang X, Ng KY. Diffractive grating structure for coherent light source production. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2009; 80:066102. [PMID: 19566230 DOI: 10.1063/1.3142483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A diffractive structure of cavities is designed to produce resonances at very high frequencies. This type of cavity structure may be useful for producing controllable coherent synchrotron radiation by microbunching the particle beam.
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Affiliation(s)
- S Y Lee
- Department of Physics, Indiana University, Bloomington, Indiana 47405, USA
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30
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31
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Schade U, Ortolani M, Lee J. Technical Report: THz Experiments with Coherent Synchrotron Radiation from BESSY II. ACTA ACUST UNITED AC 2007. [DOI: 10.1080/08940880701631351] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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32
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Shen Y, Watanabe T, Arena DA, Kao CC, Murphy JB, Tsang TY, Wang XJ, Carr GL. Nonlinear cross-phase modulation with intense single-cycle terahertz pulses. PHYSICAL REVIEW LETTERS 2007; 99:043901. [PMID: 17678365 DOI: 10.1103/physrevlett.99.043901] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2006] [Indexed: 05/16/2023]
Abstract
We have demonstrated nonlinear cross-phase modulation in electro-optic crystals using intense, single-cycle terahertz (THz) radiation. Individual THz pulses, generated by coherent transition radiation emitted by subpicosecond electron bunches, have peak energies of up to 100 microJ per pulse. The time-dependent electric field of the intense THz pulses induces cross-phase modulation in electro-optic crystals through the Pockels effect, leading to spectral shifting, broadening, and modulation of copropagating laser pulses. The observed THz-induced cross-phase modulation agrees well with a time-dependent phase-shift model.
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Affiliation(s)
- Y Shen
- National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
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33
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Byrd JM, Hao Z, Martin MC, Robin DS, Sannibale F, Schoenlein RW, Zholents AA, Zolotorev MS. Laser seeding of the storage-ring microbunching instability for high-power coherent terahertz radiation. PHYSICAL REVIEW LETTERS 2006; 97:074802. [PMID: 17026236 DOI: 10.1103/physrevlett.97.074802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2006] [Indexed: 05/12/2023]
Abstract
We report the first observation of laser seeding of the storage-ring microbunching instability. Above a threshold bunch current, the interaction of the beam and its radiation results in a coherent instability, observed as a series of stochastic bursts of coherent synchrotron radiation (CSR) at terahertz frequencies initiated by fluctuations in the beam density. We have observed that this effect can be seeded by imprinting an initial density modulation on the beam by means of laser "slicing." In such a situation, most of the bursts of CSR become synchronous with the pulses of the modulating laser and their average intensity scales exponentially with the current per bunch. We present detailed experimental observations of the seeding effect and a model of the phenomenon. This seeding mechanism also creates potential applications as a high-power source of CSR at terahertz frequencies.
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Affiliation(s)
- J M Byrd
- Ernest Orlando Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA
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34
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Wang F, Cheever D, Farkhondeh M, Franklin W, Ihloff E, van der Laan J, McAllister B, Milner R, Tschalaer C, Wang D, Wang DF, Zolfaghari A, Zwart T, Carr GL, Podobedov B, Sannibale F. Coherent THz synchrotron radiation from a storage ring with high-frequency RF system. PHYSICAL REVIEW LETTERS 2006; 96:064801. [PMID: 16606000 DOI: 10.1103/physrevlett.96.064801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2005] [Indexed: 05/08/2023]
Abstract
The generation of brilliant, stable, and broadband coherent synchrotron radiation (CSR) in electron storage rings depends strongly on ring rf system properties such as frequency and gap voltage. We have observed intense coherent radiation at frequencies approaching the THz regime produced by the MIT-Bates South Hall Ring, which employs a high-frequency S-band rf system. The measured CSR spectral intensity enhancement with 2 mA stored current was up to 10,000 times above background for wave numbers near 3 cm(-1). The measurements also uncovered strong beam instabilities that must be suppressed if such a very high rf frequency electron storage ring is to become a viable coherent THz source.
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Affiliation(s)
- F Wang
- MIT-Bates Linear Accelerator Center, Middleton, Massachusetts 01949, USA
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35
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Holldack K, Khan S, Mitzner R, Quast T. Femtosecond terahertz radiation from femtoslicing at BESSY. PHYSICAL REVIEW LETTERS 2006; 96:054801. [PMID: 16486938 DOI: 10.1103/physrevlett.96.054801] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2005] [Indexed: 05/06/2023]
Abstract
Femtosecond far-infrared radiation pulses in the THz spectral range were observed as a consequence of the energy modulation of 1.7 GeV electrons by femtosecond laser pulses in the BESSY storage ring in order to generate femtosecond x-ray pulses ("femtoslicing"). In addition to being crucial for diagnostics of the laser-electron interaction, the THz radiation itself is useful for experiments where intense ultrashort THz pulses of well-defined temporal and spectral characteristics are required.
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Affiliation(s)
- K Holldack
- Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung m.b.H. (BESSY), Albert-Einstein-Strasse 15, 12489 Berlin, Germany.
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36
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Guidi MC, Piccinini M, Marcelli A, Nucara A, Calvani P, Burattini E. Optical performances of SINBAD, the synchrotron infrared beamline at DAphiNE. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. A, OPTICS, IMAGE SCIENCE, AND VISION 2005; 22:2810-7. [PMID: 16396043 DOI: 10.1364/josaa.22.002810] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
SINBAD (Synchrotron Infrared Beamline At DAphiNE) is the first Italian synchrotron radiation beamline operating in the infrared range. It collects the radiation emitted by DANE, an electron-positron collider designed to work at 0.51 GeV with a beam current I> 1 A. The actual performances of the beamline, in terms of brilliance gain with respect to blackbodies and polarization properties, are presented and discussed. Finally, the stability of the SINBAD source, a critical issue for Fourier-transform infrared spectroscopy, is discussed.
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Affiliation(s)
- Mariangela Cestelli Guidi
- Laboratori Nazionali di Frascati-Istituto Nazionale di Fisica Nucleare, Via E. Fermi 40, 00044 Frascati, Italy.
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37
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Wu YK, Li J, Wu J. Anomalous hollow electron beams in a storage ring. PHYSICAL REVIEW LETTERS 2005; 94:134802. [PMID: 15903998 DOI: 10.1103/physrevlett.94.134802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2004] [Indexed: 05/02/2023]
Abstract
This Letter reports the first observations of an anomalous hollow electron beam in the Duke storage ring. Created by exciting the single-bunch beam in a lattice with a negative chromaticity, the hollow beam consists of a solid core inside and a large ring outside. We report the detailed measurements of the hollow beam phenomenon, including its distinct image pattern, spectrum signature, and its evolution with time. By capturing the postinstability bursting beam, the hollow beam is a unique model system for studying the transverse instabilities, in particular, the interplay of the wakefield and the lattice nonlinearity. In addition, the hollow beam can be used as a powerful tool to study the linear and nonlinear particle dynamics in the storage ring.
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Affiliation(s)
- Y K Wu
- Department of Physics, Duke University, Durham, North Carolina 27708-0319, USA.
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Sannibale F, Byrd JM, Loftsdóttir A, Venturini M, Abo-Bakr M, Feikes J, Holldack K, Kuske P, Wüstefeld G, Hübers HW, Warnock R. A model describing stable coherent synchrotron radiation in storage rings. PHYSICAL REVIEW LETTERS 2004; 93:094801. [PMID: 15447107 DOI: 10.1103/physrevlett.93.094801] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2003] [Indexed: 05/24/2023]
Abstract
We present a model describing high power stable broadband coherent synchrotron radiation (CSR) in the terahertz frequency region in an electron storage ring. The model includes distortion of bunch shape from the synchrotron radiation (SR), which enhances higher frequency coherent emission, and limits to stable emission due to an instability excited by the SR wakefield. It gives a quantitative explanation of several features of the recent observations of CSR at the BESSY II storage ring. We also use this model to optimize the performance of a source for stable CSR emission.
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Affiliation(s)
- F Sannibale
- Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA.
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Kira M, Koch SW. Exciton-population inversion and terahertz gain in semiconductors excited to resonance. PHYSICAL REVIEW LETTERS 2004; 93:076402. [PMID: 15324255 DOI: 10.1103/physrevlett.93.076402] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2004] [Indexed: 05/24/2023]
Abstract
The buildup of exciton populations in resonantly laser excited semiconductors is studied microscopically. For excitation around the 2s-exciton resonance, it is shown that polarization with a strict s-type radial symmetry can be efficiently converted into an incoherent p-type population. As a consequence, inversion between the 2p and 1s exciton states can be obtained leading to the appearance of significant terahertz gain.
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Affiliation(s)
- M Kira
- Fachbereich Physik and Material Sciences Center, Philipps Universität, Renthof 5, 35032 Marburg, Germany
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40
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Williams GP. High-power terahertz synchrotron sources. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2004; 362:403-13; discussion 413-4. [PMID: 15306529 DOI: 10.1098/rsta.2003.1325] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Electromagnetic waves, or light, are produced by accelerating electrons according to the formula assigned the name of Sir Joseph Larmor, who was secretary of The Royal Society from 1901 to 1912. For relativistic electrons the emission is enhanced by the fourth power of the increase in mass. Thus for 10 MeV electrons, for which the mass increases by a factor of 21, the enhancement is a factor of 200000. We have generated high-power broadband THz light using relativistic electrons and demonstrated that ca. 100 W can readily be produced in a band from 0.1 to 3 THz with possible extensions to 6 THz. The experiments use a new generation of light source in which bunches of electrons circulate once, but in which their energy is recovered. In such a machine the electron bunches can be very much shorter than those, say, in storage rings or synchrotrons.
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Affiliation(s)
- G P Williams
- Free Electron Laser Facility, Jefferson Lab, 12000 Jefferson Avenue, Newport News, VA 23606, USA.
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41
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Carr GL, Martin MC, McKinney WR, Jordan K, Neil GR, Williams GP. Very High Power THz Radiation Sources. J Biol Phys 2003; 29:319-25. [PMID: 23345851 DOI: 10.1023/a:1024481818029] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We report the production of high power (20watts average, ∼ 1 Megawatt peak) broadbandTHz light based on coherent emission fromrelativistic electrons. Such sources areideal for imaging, for high power damagestudies and for studies of non-linearphenomena in this spectral range. Wedescribe the source, presenting theoreticalcalculations and their experimentalverification. For clarity we compare thissource with one based on ultrafast lasertechniques.
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Affiliation(s)
- G L Carr
- Brookhaven National Laboratory, National Synchrotron Light Source, Upton, NY 11973 USA
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Abo-Bakr M, Feikes J, Holldack K, Kuske P, Peatman WB, Schade U, Wüstefeld G, Hübers HW. Brilliant, coherent far-infrared (THz) synchrotron radiation. PHYSICAL REVIEW LETTERS 2003; 90:094801. [PMID: 12689227 DOI: 10.1103/physrevlett.90.094801] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2002] [Indexed: 05/24/2023]
Abstract
A new technology for generating steady state, brilliant, broadband, coherent, far-infrared (FIR) radiation in electron storage rings is presented, suitable for FIR spectroscopy. An FIR power increase of up to 100 000 compared to the normal, incoherent synchrotron radiation in the range of approximately 5 to approximately 40 cm(-1) could be achieved. The source is up to 1000 times more brillant compared to a standard Hg arc lamp. The coherent synchrotron radiation is produced in a "low alpha" optics mode of the synchrotron light source BESSY, by bunch shortening and non-Gaussian bunch deformation.
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Affiliation(s)
- M Abo-Bakr
- BESSY mbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
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Venturini M, Warnock R. Bursts of coherent synchrotron radiation in electron storage rings: a dynamical model. PHYSICAL REVIEW LETTERS 2002; 89:224802. [PMID: 12485073 DOI: 10.1103/physrevlett.89.224802] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2002] [Revised: 10/14/2002] [Indexed: 05/24/2023]
Abstract
Evidence of coherent synchrotron radiation has been reported recently at the electron storage rings of several light source facilities. The main features of the observations are (i) a radiation wavelength short compared to the nominal bunch length, and (ii) a coherent signal showing recurrent bursts of duration much shorter than the radiation damping time, but with spacing equal to a substantial fraction of the damping time. We present a model of beam longitudinal dynamics that reproduces these features.
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Affiliation(s)
- M Venturini
- Stanford Linear Accelerator Center, Stanford University, California 94309, USA.
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Byrd JM, Leemans WP, Loftsdottir A, Marcelis B, Martin MC, McKinney WR, Sannibale F, Scarvie T, Steier C. Observation of broadband self-amplified spontaneous coherent terahertz synchrotron radiation in a storage ring. PHYSICAL REVIEW LETTERS 2002; 89:224801. [PMID: 12485072 DOI: 10.1103/physrevlett.89.224801] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2002] [Indexed: 05/24/2023]
Abstract
Bursts of coherent synchrotron radiation at far-infrared and millimeter wavelengths have been observed at several storage rings. A microbunching instability has been proposed as the source for the bursts. However, the microbunching mechanism has yet to be elucidated. We provide the first evidence that the bursts are due to a microbunching instability driven by the emission of synchrotron radiation in the bunch. Observations made at the Advanced Light Source are consistent with the values predicted by the proposed microbunching model. These results demonstrate a new instability regime for high energy synchrotron radiation sources and could impact the design of future sources.
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Affiliation(s)
- J M Byrd
- Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA
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