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Giannessi L, Allaria E, Prince KC, Callegari C, Sansone G, Ueda K, Morishita T, Liu CN, Grum-Grzhimailo AN, Gryzlova EV, Douguet N, Bartschat K. Coherent control schemes for the photoionization of neon and helium in the Extreme Ultraviolet spectral region. Sci Rep 2018; 8:7774. [PMID: 29773811 PMCID: PMC5958097 DOI: 10.1038/s41598-018-25833-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 04/25/2018] [Indexed: 12/03/2022] Open
Abstract
The seeded Free-Electron Laser (FEL) FERMI is the first source of short-wavelength light possessing the full coherence of optical lasers, together with the extreme power available from FELs. FERMI provides longitudinally coherent radiation in the Extreme Ultraviolet and soft x-ray spectral regions, and therefore opens up wide new fields of investigation in physics. We first propose experiments exploiting this property to provide coherent control of the photoionization of neon and helium, carry out numerical calculations to find optimum experimental parameters, and then describe how these experiments may be realized. The approach uses bichromatic illumination of a target and measurement of the products of the interaction, analogous to previous Brumer-Shapiro-type experiments in the optical spectral range. We describe operational schemes for the FERMI FEL, and simulate the conditions necessary to produce light at the fundamental and second or third harmonic frequencies, and to control the phase with respect to the fundamental. We conclude that a quantitative description of the phenomena is extremely challenging for present state-of-the-art theoretical and computational methods, and further development is necessary. Furthermore, the intensity available may already be excessive for the experiments proposed on helium. Perspectives for further development are discussed.
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Affiliation(s)
- Luca Giannessi
- Elettra-Sincrotrone Trieste, 34149, Basovizza, Trieste, Italy.,ENEA C.R. Frascati, 00044, Frascati, Italy
| | - Enrico Allaria
- Elettra-Sincrotrone Trieste, 34149, Basovizza, Trieste, Italy
| | - Kevin C Prince
- Elettra-Sincrotrone Trieste, 34149, Basovizza, Trieste, Italy.
| | - Carlo Callegari
- Elettra-Sincrotrone Trieste, 34149, Basovizza, Trieste, Italy
| | - Giuseppe Sansone
- Dipartimento di Fisica, CNR-IFN, Politecnico di Milano, 20133, Milan, Italy.,Physikalisches Institut der Albert-Ludwigs-Universität Freiburg, 79104, Freiburg, Germany
| | - Kiyoshi Ueda
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, 980-8577, Japan
| | - Toru Morishita
- Institute for Advanced Science, The University of Electro-communications, 1-5-1 Chofu-ga-oka, Chofu-shi, Tokyo, 182-8585, Japan
| | - Chien Nan Liu
- Department of Physics, Fu-Jen Catholic University, Taipei, 24205, Taiwan
| | - Alexei N Grum-Grzhimailo
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Elena V Gryzlova
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Nicolas Douguet
- Department of Physics and Astronomy, Drake University, Des Moines, Iowa, 50311, USA.,Department of Physics, University of Central Florida, Orlando, Florida, 32816, USA
| | - Klaus Bartschat
- Department of Physics and Astronomy, Drake University, Des Moines, Iowa, 50311, USA
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Hemsing E, Dunning M, Hast C, Raubenheimer T, Xiang D. First characterization of coherent optical vortices from harmonic undulator radiation. PHYSICAL REVIEW LETTERS 2014; 113:134803. [PMID: 25302894 DOI: 10.1103/physrevlett.113.134803] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Indexed: 06/04/2023]
Abstract
We describe the experimental generation and measurement of coherent light that carries orbital angular momentum from a relativistic electron beam radiating at the second harmonic of a helical undulator. The measured helical phase of the light is shown to be in agreement with predictions of the sign and magnitude of the phase singularity and is more than 2 orders of magnitude greater than the incoherent signal. Our setup demonstrates that such optical vortices can be produced in modern free-electron lasers in a simple afterburner arrangement for novel two-mode pump-probe experiments.
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Affiliation(s)
- E Hemsing
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - M Dunning
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - C Hast
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - T Raubenheimer
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Dao Xiang
- Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
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Spezzani C, Allaria E, Coreno M, Diviacco B, Ferrari E, Geloni G, Karantzoulis E, Mahieu B, Vento M, De Ninno G. Coherent light with tunable polarization from single-pass free-electron lasers. PHYSICAL REVIEW LETTERS 2011; 107:084801. [PMID: 21929170 DOI: 10.1103/physrevlett.107.084801] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2011] [Indexed: 05/31/2023]
Abstract
Tunable polarization over a wide spectral range is a required feature of light sources employed to investigate the properties of local symmetry in matter. In this Letter, we provide the first experimental characterization of the polarization of the harmonic light produced by a free-electron laser and demonstrate a method to obtain free-electron laser harmonics with tunable polarization. Experimental results are successfully compared with theory. Our findings can be expected to have a deep impact on the design and realization of experiments requiring full control of light polarization.
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Affiliation(s)
- C Spezzani
- Sincrotrone Trieste, S.S. 14 km 163.5, Basovizza (Trieste), Italy
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Allaria E, De Ninno G, Spezzani C. Experimental demonstration of frequency pulling in single-pass free-electron lasers. OPTICS EXPRESS 2011; 19:10619-10624. [PMID: 21643316 DOI: 10.1364/oe.19.010619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Frequency pulling is a well-known phenomenon in standard laser physics, leading to a shift of the laser frequency when the cavity and maximum gain frequencies are detuned. In this letter we present the first experimental demonstration of frequency pulling in single-pass free-electron lasers. Measurements are performed using the single-pass free-electron laser installed on the Elettra storage ring.
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Affiliation(s)
- E Allaria
- 1Sincrotrone Trieste, SS 14 km 163.5, Basovizza, Ts, Italy
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Hemsing E, Marinelli A, Rosenzweig JB. Generating optical orbital angular momentum in a high-gain free-electron laser at the first harmonic. PHYSICAL REVIEW LETTERS 2011; 106:164803. [PMID: 21599372 DOI: 10.1103/physrevlett.106.164803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Indexed: 05/30/2023]
Abstract
A scheme to generate intense coherent light that carries orbital angular momentum (OAM) at the fundamental wavelength of an x-ray free-electron laser (FEL) is described. The OAM light is emitted as the dominant mode of the system until saturation provided that the helical microbunching imposed on the electron beam is larger than the shot-noise bunching that leads to self-amplified emission. Operating at the fundamental, this scheme is more efficient than alternate schemes that rely on harmonic emission, and can be applied to x-ray FELs without using external optical mode conversion elements.
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Affiliation(s)
- E Hemsing
- Particle Beam Physics Laboratory, Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095, USA
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Hemsing E, Musumeci P, Reiche S, Tikhoplav R, Marinelli A, Rosenzweig JB, Gover A. Helical electron-beam microbunching by harmonic coupling in a helical undulator. PHYSICAL REVIEW LETTERS 2009; 102:174801. [PMID: 19518787 DOI: 10.1103/physrevlett.102.174801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2008] [Indexed: 05/27/2023]
Abstract
Microbunching of a relativistic electron beam into a helix is examined analytically and in simulation. Helical microbunching is shown to occur naturally when an e beam interacts resonantly at the harmonics of the combined field of a helical magnetic undulator and an axisymmetric input laser beam. This type of interaction is proposed as a method to generate a strongly prebunched e beam for coherent emission of light with orbital angular momentum at virtually any wavelength. The results from the linear microbunching theory show excellent agreement with three-dimensional numerical simulations.
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Affiliation(s)
- E Hemsing
- Particle Beam Physics Laboratory, Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095, USA
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