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1. First Lasing of a Free Electron Laser in the Soft X-Ray Spectral Range with Echo Enabled Harmonic Generation

Author

Allaria, Enrico, Abrami, Alessandro, Badano, Laura, Bossi, Maurizio, Braun, Hans-Heinrich, Bruchon, Niky, Capotondi, Flavio, Castronovo, Davide, Cautero, Marco, Cinquegrana, Paolo, Coreno, Marcello, Couprie, Marie-Emmanuelle, Cudin, Ivan, Danailov, Miltcho, De Ninno, Giovanni, Demidovich, Alexander, Di Mitri, Simone, Diviacco, Bruno, Fawley, William, Feng, Chao, Ferianis, Mario, Ferrari, Eugenio, Foglia, Laura, Frassetto, Fabio, Gaio, Giulio, Garzella, David, Ghaith, Amin, Giacuzzo, Fabio, Giannessi, Luca, Grattoni, Vanessa, Grulja, Sandi, Hemsing, Erik, Iazzourene, Fatma, Kurdi, Gabor, Lonza, Marco, Mahne, Nicola, Malvestuto, Marco, Manfredda, Michele, Masciovecchio, Claudio, Miotti, Paolo, Mirian, Najmeh, Nikolov, Ivaylo, Penco, Giuseppe, Penn, Gregory, Poletto, Luca, Pop, Mihai, Prat, Eduard, Principi, Emiliano, Raimondi, Lorenzo, Rebernik Ribič, Primoz, Reiche, Sven, Roussel, Eléonore, Sauro, Roberto, Scafuri, Claudio, Sigalotti, Paolo, Spampinati, Simone, Spezzani, Carlo, Sturari, Luca, Svandrlik, Michele, Tanikawa, Takanori, Trovò, Mauro, Veronese, Marco, Vivoda, Davide, Xiang, Dao, Zaccaria, Maurizio, Zangrando, Dino, Zangrando, Marco, Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), and Université de Lille-Centre National de la Recherche Scientifique (CNRS)

Subjects
FEL, electron, free-electron laser, experiment, echo enabled harmonic generation, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], free-electron-laser, Accelerator Physics, First Lasing, laser
Abstract

We report on the successful operation of a Free Electron Laser (FEL) in the Echo Enabled Harmonic Generation (EEHG) scheme at the FERMI facility at Sincrotrone Trieste. The experiment required a modification of the FEL-2 undulator line which, in normal operation, uses two stages of high-gain harmonic generation separated by a delay line. In addition to a new seed laser, the dispersion in the delay-line was increased, the second stage modulator changed and a new manipulator installed in the delay-line chicane hosting additional diagnostic components. With this modified setup we have demonstrated the first evidence of strong exponential gain in a free electron laser operated in EEHG mode at wavelengths as short as 5 nm., Proceedings of the 39th Free Electron Laser Conference, FEL2019, Hamburg, Germany

Published
2019

2. Widely tunable two-colour seeded free-electron laser source for resonant-pump resonant-probe magnetic scattering

Author

Ferrari, Eugenio, Spezzani, Carlo, Fortuna, Franck, Delaunay, Renaud, Vidal, Franck, Nikolov, Ivaylo, Cinquegrana, Paolo, Diviacco, Bruno, Gauthier, David, Penco, Giuseppe, Ribic, Primoz Rebernik, Roussel, Eleonore, Trovo, Marco, Moussy, Jean Baptiste, Pincelli, Tommaso, Lounis, Lounès, Manfredda, Michele, Pedersoli, Emanuele, Capotondi, Flavio, Svetina, Cristian, Mahne, Nicola, Zangrando, Marco, Raimondi, Lorenzo, Demidovich, Alexander, Giannessi, Luca, De Ninno, Giovanni, Danailov, Miltcho Boyanov, Allaria, Enrico, Sacchi, Maurizio, Elettra Sincrotrone Trieste, ELETTRA Sincrotrone Trieste, Dipartimento di Fisica ( DIPARTIMENTO DI FISICA ), Università degli studi di Trieste, Laboratoire de Physique des Solides ( LPS ), Université Paris-Sud - Paris 11 ( UP11 ) -Centre National de la Recherche Scientifique ( CNRS ), Centre de Sciences Nucléaires et de Sciences de la Matière ( CSNSM ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Chimie Physique - Matière et Rayonnement ( LCPMR ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS ), Croissance et propriétés de systèmes hybrides en couches minces ( INSP-E8 ), Institut des Nanosciences de Paris ( INSP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS ), Service de physique de l'état condensé ( SPEC - UMR3680 ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Centre National de la Recherche Scientifique ( CNRS ), Dipartimento di Fisica (Milano), Università degli studi di Milano [Milano], École normale supérieure - Paris ( ENS Paris ), Graduate School of Nanotechnology, CNR - Istituto Officina dei Materiali ( IOM ), Consiglio Nazionale delle Ricerche [Roma] ( CNR ), Italian National agency for new technologies, Energy and sustainable economic development [Frascati] ( ENEA ), Laboratory of Quantum Optics, University of Nova Gorica, Synchrotron SOLEIL ( SSOLEIL ), Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Physique des Solides (LPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), CSNSM PS2, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie Physique - Matière et Rayonnement (LCPMR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Croissance et propriétés de systèmes hybrides en couches minces (INSP-E8), Institut des Nanosciences de Paris (INSP), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire Nano-Magnétisme et Oxydes (LNO), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, PSL Research University (PSL), CNR Istituto Officina dei Materiali (IOM), Consiglio Nazionale delle Ricerche [Roma] (CNR), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Dipartimento di Fisica [Trieste], Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Milano [Milano] (UNIMI), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL), Italian National agency for new technologies, Energy and sustainable economic development [Frascati] (ENEA), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Science, General Physics and Astronomy, Physics::Optics, 02 engineering and technology, Electron, 01 natural sciences, 7. Clean energy, Article, General Biochemistry, Genetics and Molecular Biology, law.invention, Optics, Optical physics, law, 0103 physical sciences, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 010306 general physics, Physics, [PHYS]Physics [physics], Range (particle radiation), Multidisciplinary, [ PHYS ] Physics [physics], business.industry, Scattering, Free-electron laser, General Chemistry, 021001 nanoscience & nanotechnology, Laser, Physical sciences, Applied physics, Wavelength, Extreme ultraviolet, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Optoelectronics, Physics::Accelerator Physics, 0210 nano-technology, business
Abstract

The advent of free-electron laser (FEL) sources delivering two synchronized pulses of different wavelengths (or colours) has made available a whole range of novel pump–probe experiments. This communication describes a major step forward using a new configuration of the FERMI FEL-seeded source to deliver two pulses with different wavelengths, each tunable independently over a broad spectral range with adjustable time delay. The FEL scheme makes use of two seed laser beams of different wavelengths and of a split radiator section to generate two extreme ultraviolet pulses from distinct portions of the same electron bunch. The tunability range of this new two-colour source meets the requirements of double-resonant FEL pump/FEL probe time-resolved studies. We demonstrate its performance in a proof-of-principle magnetic scattering experiment in Fe–Ni compounds, by tuning the FEL wavelengths to the Fe and Ni 3p resonances., Two-colour X-ray free electron laser is a powerful tool for pump–probe measurements, but currently constrained by limited tunability. Here, Ferrari et al. develop a configuration that allows tuning both the pump and the probe to specific electronic excitations, providing element selectivity.

Published
2016

3. Photon transport of the superradiant TeraFERMI THz beamline at the FERMI free-electron laser

Author

Svetina, Cristian, Mahne, Nicola, Raimondi, Lorenzo, Perucchi, Andrea, Di Pietro, Paola, Lupi, Stefano, Schmidt, Bernhard, and Zangrando, Marco

Subjects
Nuclear and High Energy Physics, Photon, Terahertz radiation, Physics::Optics, 02 engineering and technology, 01 natural sciences, free electron laser (FEL), law.invention, Optics, law, 0103 physical sciences, 010306 general physics, Instrumentation, TeraFERMI, Physics, Radiation, business.industry, Free-electron laser, Undulator, 021001 nanoscience & nanotechnology, Laser, Beamline, coherent transition radiation (CTR), FERMI free-electron laser, terahertz beamline, Femtosecond, ddc:540, Optoelectronics, Physics::Accelerator Physics, 0210 nano-technology, business, Beam (structure)
Abstract

TeraFERMI is the new terahertz (THz) beamline for pump–probe studies on the femtosecond time-scale, under construction at the FERMI free-electron laser (FEL) facility in Trieste, Italy. The beamline will take advantage of the coherent radiation emitted by the spent electrons from the FEL undulators, before being dumped. This will result in short, coherent, high-power THz pulses to be used as a pump beam, in order to modulate structural properties of matter, thereby inducing phase transitions. The TeraFERMI beamline collects THz radiation in the undulator hall and guides it along a beam pipe which is approximately 30 m long, extending across the safety hutch and two shielding walls. Here the optical design, which will allow the efficient transport of the emitted THz radiation in the experimental hall, is presented.

Published
2016

4. Ultrafast Adsorbate Excitation Probed with Subpicosecond-Resolution X-Ray Absorption Spectroscopy

Author

Denys Naumenko, Filippo Cavalca, Jörgen Gladh, Piter S. Miedema, Elias Diesen, Martina Dell'Angela, Fivos Perakis, Luca Giannessi, Hirohito Ogasawara, Boyang Liu, Tony F. Heinz, Jerry LaRue, Lorenzo Raimondi, Frank Abild-Pedersen, Roberto Costantini, Ivaylo Nikolov, Martin Beye, Emanuele Pedersoli, Sergey Koroidov, Carlo Spezzani, Matthew Weston, Simon Schreck, Flavio Capotondi, Hsin-Yi Wang, Anders Nilsson, Alan C. Luntz, Johannes Voss, Diesen, Elia, Wang, Hsin-Yi, Schreck, Simon, Weston, Matthew, Ogasawara, Hirohito, Larue, Jerry, Perakis, Fivo, Dell'Angela, Martina, Capotondi, Flavio, Giannessi, Luca, Pedersoli, Emanuele, Naumenko, Deny, Nikolov, Ivaylo, Raimondi, Lorenzo, Spezzani, Carlo, Beye, Martin, Cavalca, Filippo, Liu, Boyang, Gladh, Jörgen, Koroidov, Sergey, Miedema, Piter S, Costantini, Roberto, Heinz, Tony F, Abild-Pedersen, Frank, Voss, Johanne, Luntz, Alan C, and Nilsson, Anders

Subjects
Reactions at surfaces, education.field_of_study, Materials science, Absorption spectroscopy, Reactions at surface, Population, Time evolution, General Physics and Astronomy, X-ray absorption spectroscopy, Ultrafast phenomena, Laser, dynamics & catalysis, law.invention, Vibronic coupling, law, Chemical kineticsM, dynamics & catalysi, Picosecond, ddc:530, Chemical kineticsM, dynamics & catalysis, Atomic physics, education, Ultrashort pulse, Excitation, Chemical kineticsM
Abstract

Physical review letters 127(1), 016802 (2021). doi:10.1103/PhysRevLett.127.016802, We use a pump-probe scheme to measure the time evolution of the C K-edge x-ray absorption spectrum from CO/Ru(0001) after excitation by an ultrashort high-intensity optical laser pulse. Because of the short duration of the x-ray probe pulse and precise control of the pulse delay, the excitation-induced dynamics during the first picosecond after the pump can be resolved with unprecedented time resolution. By comparing with density functional theory spectrum calculations, we find high excitation of the internal stretch and frustrated rotation modes occurring within 200 fs of laser excitation, as well as thermalization of the system in the picosecond regime. The ���100 fs initial excitation of these CO vibrational modes is not readily rationalized by traditional theories of nonadiabatic coupling of adsorbates to metal surfaces, e.g., electronic frictions based on first order electron-phonon coupling or transient population of adsorbate resonances. We suggest that coupling of the adsorbate to nonthermalized electron-hole pairs is responsible for the ultrafast initial excitation of the modes., Published by APS, College Park, Md.

Published
2021

5. Experimental setups for FEL-based four-wave mixing experiments at FERMI

Author

Paolo Sigalotti, R. Godnig, Giulio Gaio, G. Kurdi, C. Fava, Emanuele Pedersoli, L. Pivetta, Roberto Passuello, Alessandro Gessini, Filippo Bencivenga, Marco Lonza, Miltcho B. Danailov, Pietro Parisse, Riccardo Cucini, Martin Scarcia, G. Loda, Marco Zangrando, Riccardo Mincigrucci, R. Gobessi, Emiliano Principi, Michele Manfredda, M. Zaccaria, F. Giacuzzo, Simone Gerusina, Cristian Svetina, Andrea Battistoni, Flavio Capotondi, Alexander Demidovich, Roberto Sauro, A. Abrami, Milan Prica, Riccardo Grisonich, Ilaria Rago, G. Pangon, Nicola Mahne, Lorenzo Raimondi, Roberto Borghes, Maya Kiskinova, F. Dallari, Claudio Masciovecchio, Bencivenga, Filippo, Zangrando, Marco, Svetina, Cristian, Abrami, Alessandro, Battistoni, Andrea, Borghes, Roberto, Capotondi, Flavio, Cucini, Riccardo, Dallari, Francesco, Danailov, Miltcho, Demidovich, Alexander, Fava, Claudio, Gaio, Giulio, Gerusina, Simone, Gessini, Alessandro, Giacuzzo, Fabio, Gobessi, Riccardo, Godnig, Roberto, Grisonich, Riccardo, Kiskinova, Maya, Kurdi, Gabor, Loda, Giorgio, Lonza, Marco, Mahne, Nicola, Manfredda, Michele, Mincigrucci, Riccardo, Pangon, Gianpiero, Parisse, Pietro, Passuello, Roberto, Pedersoli, Emanuele, Pivetta, Lorenzo, Prica, Milan, Principi, Emiliano, Rago, ILARIA, CARMELA, Raimondi, Lorenzo, Sauro, Roberto, Scarcia, Martin, Sigalotti, Paolo, Zaccaria, Maurizio, and Masciovecchio, Claudio

Subjects
Nuclear and High Energy Physics, 02 engineering and technology, Grating, Inelastic scattering, 01 natural sciences, law.invention, Four-wave mixing, Optics, free-electron laser, law, 0103 physical sciences, non-linear optic, 010306 general physics, Instrumentation, Nuclear and High Energy Physic, Physics, Radiation, business.industry, four-wave-mixing, free-electron lasers, non-linear optics, transient grating, Nonlinear optics, 021001 nanoscience & nanotechnology, Laser, Beamline, Transient (oscillation), 0210 nano-technology, business, Fermi Gamma-ray Space Telescope
Abstract

The recent advent of free-electron laser (FEL) sources is driving the scientific community to extend table-top laser research to shorter wavelengths adding elemental selectivity and chemical state specificity. Both a compact setup (mini-TIMER) and a separate instrument (EIS-TIMER) dedicated to four-wave-mixing (FWM) experiments has been designed and constructed, to be operated as a branch of the Elastic and Inelastic Scattering beamline: EIS. The FWM experiments that are planned at EIS-TIMER are based on the transient grating approach, where two crossed FEL pulses create a controlled modulation of the sample excitations while a third time-delayed pulse is used to monitor the dynamics of the excited state. This manuscript describes such experimental facilities, showing the preliminary results of the commissioning of the EIS-TIMER beamline, and discusses original experimental strategies being developed to study the dynamics of matter at the fs-nm time-length scales. In the near future such experimental tools will allow more sophisticated FEL-based FWM applications, that also include the use of multiple and multi-color FEL pulses. © 2016 International Union of Crystallography.

Published
2015

6. The Low Density Matter (LDM) beamline at FERMI: optical layout and first commissioning

Author

C. Fava, M. Devetta, R. Katzy, Vitaliy Feyer, Viktor Lyamayev, Lorenzo Avaldi, R. Sergo, Monica de Simone, Stefano Stranges, Paola Finetti, Y. Ovcharenko, Simone Gerusina, Cristian Svetina, Michele Di Fraia, Michele Alagia, Cesare Grazioli, Kevin C. Prince, Lorenzo Raimondi, Thomas Möller, Frank Stienkemeier, Marcel Drabbels, Oksana Plekan, Marco Zangrando, A. Moise, Antti Kivimäki, Nicola Mahne, Paolo Piseri, Patrick O'Keeffe, Tommaso Mazza, Carlo Callegari, Marcello Coreno, Giuseppe Cautero, Svetina, Cristian, Grazioli, Cesare, Mahne, Nicola, Raimondi, Lorenzo, Fava, Claudio, Zangrando, Marco, Gerusina, Simone, Alagia, Michele, Avaldi, Lorenzo, Cautero, Giuseppe, de Simone, Monica, Devetta, Michele, DI FRAIA, Michele, Drabbels, Marcel, Feyer, Vitaliy, Finetti, Paola, Katzy, Raphael, Kivimäki, Antti, Lyamayev, Viktor, Mazza, Tommaso, Moise, Angelica, Möller, Thoma, O'Keeffe, Patrick, Ovcharenko, Yevheniy, Piseri, Paolo, Plekan, Oksana, Prince, Kevin C., Sergo, Rudi, Stienkemeier, Frank, Stranges, Stefano, Coreno, Marcello, and Callegari, Carlo

Subjects
Nuclear and High Energy Physics, Photon, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, beamline, free-electron laser, low-density matter, metrology Special issue on X-ray Free-Electron Lasers, photon transport, Instrumentation, Radiation, Physics::Medical Physics, Phase (waves), free electron laser, 02 engineering and technology, 01 natural sciences, law.invention, Optics, metrology Special issue on X-ray Free-Electron Laser, law, 0103 physical sciences, ddc:550, molecules, clusters, FERMI project, 010306 general physics, Free-Electron Lasers, Nuclear and High Energy Physic, Physics, Condensed Matter::Quantum Gases, atoms, business.industry, Free-electron laser, fase gassosa, 021001 nanoscience & nanotechnology, Laser, Metrology, metrology, Beamline, ddc:540, Physics::Accelerator Physics, 0210 nano-technology, business, Fermi Gamma-ray Space Telescope
Abstract

A description of the LDM beamline of FERMI is given, with a detailed description of the photon transport., The Low Density Matter (LDM) beamline has been built as part of the FERMI free-electron laser (FEL) facility to serve the atomic, molecular and cluster physics community. After the commissioning phase, it received the first external users at the end of 2012. The design and characterization of the LDM photon transport system is described, detailing the optical components of the beamline.

Published
2015

7. Control of the Polarization of a Vacuum-Ultraviolet, High-Gain, Free-Electron Laser

Author

Joern Seltmann, Jens Buck, Miltcho B. Danailov, Cesare Grazioli, Jens Viefhaus, David Gauthier, W. M. Fawley, P. Rebernik, Eugenio Ferrari, Giuseppe Penco, P. Gessler, Luca Giannessi, Marco Zangrando, Simone Di Mitri, Guillaume Lambert, Paola Finetti, Oksana Plekan, Giovanni De Ninno, Antti Kivimäki, Alberto De Fanis, Enrico Allaria, Michael Meyer, Bruno Diviacco, Flavio Capotondi, Stefan Moeller, Philippe Zeitoun, Markus Ilchen, Jan Lüning, Frank Scholz, Alexander Demidovich, André Knie, Lorenzo Raimondi, Boris Vodungbo, Nicola Mahne, Jan Grünert, Mauro Trovò, Julien Gautier, Tommaso Mazza, Barbara Ressel, Benoît Mahieu, Emanuele Pedersoli, A. Abrami, Ivaylo Nikolov, Cristian Svetina, Carlo Callegari, Marcello Coreno, Leif Glaser, Carlo Spezzani, Sincrotrone Trieste, Centre de Recherche en Cancérologie de Marseille (CRCM), Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Paoli-Calmettes, Fédération nationale des Centres de lutte contre le Cancer (FNCLCC)-Fédération nationale des Centres de lutte contre le Cancer (FNCLCC)-Aix Marseille Université (AMU), Laboratorio TASC, Istituto Nazionale di Fisica Nucleare (INFN), School of Applied Sciences, University of Nova Gorica, Laboratoire de Sociologie et d'Anthropologie - UFC (EA 3189) (LASA), Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), CNR Istituto Officina dei Materiali (IOM), Consiglio Nazionale delle Ricerche [Roma] (CNR), Synchrotron ELETTRA, Elettra Sincrotrone Trieste, Infectious Diseases, Ospedali Galliera, EDF (EDF), CNR-IMIP, CNR-IOM, Institute for Forest Genetics and Forest Tree Breeding, Federal Research Centre for Forestry and Forest Products, German Weather Service, European XFEL GmbH, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University [Sendai], Institute of Physics and CINSaT, University of Kassel, Center for Magnetic Resonance Research [Minneapolis] (CMRR), University of Minnesota Medical School, University of Minnesota System-University of Minnesota System, NEST-INFM (INFM), Dipartimento di Scienze Fisiche, Informatiche e Matematiche [Modena], Università degli Studi di Modena e Reggio Emilia (UNIMORE), Institute of Psychological Medicine and Clinical Neurosciences, Cardiff University, MRC Centre for Neuropsychiatric Genetics and Genomics, Medical Research Council (MRC)-School of Medicine [Cardiff], Institute of Medical Genetics [Cardiff]-Cardiff University-Institute of Medical Genetics [Cardiff]-Cardiff University, Centre de Recherche des Cordeliers (CRC), Université Paris Diderot - Paris 7 (UPD7)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de Chimie Physique - Matière et Rayonnement (LCPMR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Italian National agency for new technologies, Energy and sustainable economic development [Frascati] (ENEA), Centre de Recherche en Cancérologie de Marseille ( CRCM ), Aix Marseille Université ( AMU ) -Institut Paoli-Calmettes, Fédération nationale des Centres de lutte contre le Cancer (FNCLCC)-Fédération nationale des Centres de lutte contre le Cancer (FNCLCC)-Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Centre National de la Recherche Scientifique ( CNRS ), National Institute for Nuclear Physics ( INFN ), Laboratoire de Sociologie et d'Anthropologie - UFC (EA 3189) ( LASA ), Université Bourgogne Franche-Comté [COMUE] ( UBFC ) -Université de Franche-Comté ( UFC ), Laboratoire d'optique appliquée ( LOA ), École Nationale Supérieure de Techniques Avancées ( Univ. Paris-Saclay, ENSTA ParisTech ) -École polytechnique ( X ) -Centre National de la Recherche Scientifique ( CNRS ), CNR - Istituto Officina dei Materiali ( IOM ), Consiglio Nazionale delle Ricerche [Roma] ( CNR ), ELETTRA Sincrotrone Trieste, EDF ( EDF ), Center for Magnetic Resonance Research [Minneapolis] ( CMRR ), NEST-INFM ( INFM ), Dipartimento di Fisica, Universit`a di Modena e Reggio Emilia, Cardiff University School of Medicine, Cardiff University-Medical Research Council (MRC), Centre de Recherche des Cordeliers ( CRC ), Université Paris Diderot - Paris 7 ( UPD7 ) -École pratique des hautes études ( EPHE ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Université Paris Descartes - Paris 5 ( UPD5 ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Laboratoire de Chimie Physique - Matière et Rayonnement ( LCPMR ), Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ), Italian National agency for new technologies, Energy and sustainable economic development [Frascati] ( ENEA ), Giannessi, L., Deutsches Elektronen-Synchrotron [Hamburg] (DESY), Laboratorio TASC (IOM CNR), Consiglio Nazionale delle Ricerche (CNR), Laboratory of Quantum Optics, Dipartimento di Fisica [Trieste], Università degli studi di Trieste = University of Trieste, European XFEL Gmbh, Stanford Pulse Institute, Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Graduate School of Nanotechnology, Instituto di Struttura della Materia (ISM), SLAC National Accelerator Laboratory (SLAC), Stanford University, National Institute for Nuclear Physics (INFN), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université de Franche-Comté (UFC), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-École Nationale Supérieure de Techniques Avancées (ENSTA Paris), Université Paris Diderot - Paris 7 (UPD7)-École pratique des hautes études (EPHE)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Allaria, Enrico, Diviacco, Bruno, Callegari, Carlo, Finetti, Paola, Mahieu, Benoît, Viefhaus, Jen, Zangrando, Marco, DE NINNO, Giovanni, Lambert, Guillaume, Ferrari, Eugenio, Buck, Jen, Ilchen, Marku, Vodungbo, Bori, Mahne, Nicola, Svetina, Cristian, Spezzani, Carlo, Di Mitri, Simone, Penco, Giuseppe, Trovò, Mauro, Fawley, William M., Rebernik, Primoz R., Gauthier, David, Grazioli, Cesare, Coreno, Marcello, Ressel, Barbara, Kivimäki, Antti, Mazza, Tommaso, Glaser, Leif, Scholz, Frank, Seltmann, Joern, Gessler, Patrick, Grünert, Jan, De Fanis, Alberto, Meyer, Michael, Knie, André, Moeller, Stefan P., Raimondi, Lorenzo, Capotondi, Flavio, Pedersoli, Emanuele, Plekan, Oksana, Danailov, Miltcho B., Demidovich, Alexander, Nikolov, Ivaylo, Abrami, Alessandro, Gautier, Julien, Lüning, Jan, Zeitoun, Philippe, Giannessi, Luca, Aix Marseille Université ( AMU ) -Institut Paoli-Calmettes-Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Sociologie et d'Anthropologie - UFC ( LASA ), Université Bourgogne Franche-Comté ( UBFC ) -Université de Franche-Comté ( UFC ), Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Université Paris Descartes - Paris 5 ( UPD5 ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -École pratique des hautes études ( EPHE ) -Université Paris Diderot - Paris 7 ( UPD7 ), and Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
Particles and field, QC1-999, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], General Physics and Astronomy, Radiation, law.invention, Physics and Astronomy (all), Optics, law, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], ddc:530, [ PHYS.PHYS.PHYS-ACC-PH ] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Photonics, Particles and fields, Interdisciplinary physics, Physics, [PHYS]Physics [physics], Interdisciplinary physic, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS ] Physics [physics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Free-electron laser, Photonic, Polarimeter, [ PHYS.PHYS.PHYS-PLASM-PH ] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], Polarization (waves), Laser, Wavelength, business, Fermi Gamma-ray Space Telescope
Abstract

International audience; The two single-pass, externally seeded free-electron lasers (FELs) of the FERMI user facility are designed around Apple-II-type undulators that can operate at arbitrary polarization in the vacuum ultraviolet-to-soft x-ray spectral range. Furthermore, within each FEL tuning range, any output wavelength and polarization can be set in less than a minute of routine operations. We report the first demonstration of the full output polarization capabilities of FERMI FEL-1 in a campaign of experiments where the wavelength and nominal polarization are set to a series of representative values, and the polarization of the emitted intense pulses is thoroughly characterized by three independent instruments and methods, expressly developed for the task. The measured radiation polarization is consistently >90% and is not significantly spoiled by the transport optics; differing, relative transport losses for horizontal and vertical polarization become more prominent at longer wavelengths and lead to a non-negligible ellipticity for an originally circularly polarized state. The results from the different polarimeter setups validate each other, allow a cross-calibration of the instruments, and constitute a benchmark for user experiments.

Published
2014

8. Two-colour generation in a chirped seeded free-electron laser: a close look

Author

William M. Fawley, Cristian Svetina, Luca Giannessi, Marco Zangrando, M. B. Danailov, Giuseppe Penco, M. Trovo, S. Di Mitri, D. Castronovo, C. Spezzani, Enrico Allaria, Lars Fröhlich, Benoît Mahieu, Lorenzo Raimondi, D. Gauthier, Simone Spampinati, Alexander Demidovich, Eugenio Ferrari, Nicola Mahne, G. De Ninno, Elettra Sincrotrone Trieste, Laboratory of Quantum Optics, University of Nova Gorica, Service des Photons, Atomes et Molécules (SPAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Agenzia Nazionale per le nuove Tecnologie, l’energia e lo sviluppo economico sostenibile (ENEA), Graduate School of Nanotechnology, Università degli studi di Trieste, CNR Istituto Officina dei Materiali (IOM), Consiglio Nazionale delle Ricerche [Roma] (CNR), Agenzia Nazionale per le nuove Tecnologie, l’energia e lo sviluppo economico sostenibile = Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Università degli studi di Trieste = University of Trieste, National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Mahieu, Benoît, Allaria, Enrico, Castronovo, Davide, Danailov, Miltcho B., Demidovich, Alexander, DE NINNO, Giovanni, Di Mitri, Simone, Fawley, William M., Ferrari, Eugenio, Fröhlich, Lar, Gauthier, David, Giannessi, Luca, Mahne, Nicola, Penco, Giuseppe, Raimondi, Lorenzo, Spampinati, Simone, Spezzani, Carlo, Svetina, Cristian, Trovò, Mauro, Zangrando, Marco, and Giannessi, L.

Subjects
Free-electron lasers (FELs), OCIS: 140.2600, 320.1590, 320.5540, Materials science, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 7. Clean energy, 01 natural sciences, Lasers and laser optics, law.invention, Ultrafast optics, 010309 optics, Optics, Light source, law, Atomic and Molecular Physics, 0103 physical sciences, Chirp, 010306 general physics, Range (particle radiation), Pulse shaping, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Free-electron laser, Laser, Atomic and Molecular Physics, and Optics, Seeding, and Optics, business
Abstract

We present the experimental demonstration of a method for generating two spectrally and temporally separated pulses by an externally seeded, single-pass free-electron laser operating in the extreme-ultraviolet spectral range. Our results, collected on the FERMI@Elettra facility and confirmed by numerical simulations, demonstrate the possibility of controlling both the spectral and temporal features of the generated pulses. A free-electron laser operated in this mode becomes a suitable light source for jitter-free, two-colour pump-probe experiments. (c) 2013 Optical Society of America

Published
2013

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