Author: Couprie, M.-E.
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MOA01 Riding the FEL Instability (Dedicated to Alberto Renieri) 1
  • G. Dattoli
    ENEA C.R. Frascati, Frascati (Roma), Italy
  • M.-E. Couprie
    SOLEIL, Gif-sur-Yvette, France
  • C. Pellegrini
    SLAC, Menlo Park, California, USA
  The Free Electron Laser (FEL) operation, like that of any Free Electron source of coherent radiation, is associated with the onset of an instability. The interplay between the FEL and other instabilities, affecting the beam, is one of the interesting aspects of the associated dynamics. It involves issues of practical interest (Renieri Limit in Storage Ring FELs, suppression of instabilities like saw-tooth and synchrotron…). The paper reviews these problems and offers an overview of the scientific contribution of Alberto Renieri to the FEL from this perspective.  
slides icon Slides MOA01 [5.143 MB]  
DOI • reference for this paper ※  
About • paper received ※ 26 August 2019       paper accepted ※ 09 September 2019       issue date ※ 05 November 2019  
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MOA02 First Lasing of a Free Electron Laser in the Soft X-Ray Spectral Range with Echo Enabled Harmonic Generation 7
  • E. Allaria, A. Abrami, L. Badano, M. Bossi, N. Bruchon, F. Capotondi, D. Castronovo, M. Cautero, P. Cinquegrana, M. Coreno, I. Cudin, M.B. Danailov, G. De Ninno, A.A. Demidovich, S. Di Mitri, B. Diviacco, W.M. Fawley, M. Ferianis, L. Foglia, G. Gaio, F. Giacuzzo, L. Giannessi, S. Grulja, F. Iazzourene, G. Kurdi, M. Lonza, N. Mahne, M. Malvestuto, M. Manfredda, C. Masciovecchio, N.S. Mirian, I. Nikolov, G. Penco, E. Principi, L. Raimondi, P. Rebernik Ribič, R. Sauro, C. Scafuri, P. Sigalotti, S. Spampinati, C. Spezzani, L. Sturari, M. Svandrlik, M. Trovò, M. Veronese, D. Vivoda, M. Zaccaria, D. Zangrando, M. Zangrando
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  • H.-H. Braun, E. Ferrari, E. Prat, S. Reiche
    PSI, Villigen PSI, Switzerland
  • N. Bruchon
    University of Trieste, Trieste, Italy
  • M. Coreno
    CNR-ISM, Trieste, Italy
  • M.-E. Couprie, A. Ghaith
    SOLEIL, Gif-sur-Yvette, France
  • G. De Ninno
    University of Nova Gorica, Nova Gorica, Slovenia
  • C. Feng
    SARI-CAS, Pudong, Shanghai, People’s Republic of China
  • F. Frassetto, L.P. Poletto
    LUXOR, Padova, Italy
  • D. Garzella
    CEA, Gif-sur-Yvette, France
  • V. Grattoni
    DESY, Hamburg, Germany
  • E. Hemsing
    SLAC, Menlo Park, California, USA
  • P. Miotti
    CNR-IFN, Padova, Italy
  • G. Penn
    LBNL, Berkeley, California, USA
  • M.A. Pop
    MAX IV Laboratory, Lund University, Lund, Sweden
  • E. Roussel
    PhLAM/CERCLA, Villeneuve d’Ascq Cedex, France
  • T. Tanikawa
    EuXFEL, Schenefeld, Germany
  • D. Xiang
    Shanghai Jiao Tong University, Shanghai, People’s Republic of China
  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.  
slides icon Slides MOA02 [5.133 MB]  
DOI • reference for this paper ※  
About • paper received ※ 21 August 2019       paper accepted ※ 28 August 2019       issue date ※ 05 November 2019  
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THP048 Progress Towards Laser Plasma Electron Based Free Electron Laser on COXINEL 684
  • M.-E. Couprie, T. André, F. Blache, F. Bouvet, F. Briquez, Y. Dietrich, J.P. Duval, M. El Ajjouri, A. Ghaith, C. Herbeaux, N. Hubert, M. Khojoyan, C.A. Kitégi, M. Labat, N. Leclercq, A. Lestrade, A. Loulergue, O. Marcouillé, F. Marteau, D. Oumbarek Espinos, P. Rommeluère, M. Sebdaoui, K.T. Tavakoli, M. Valléau
    SOLEIL, Gif-sur-Yvette, France
  • I.A. Andriyash, V. Malka, S. Smartzev
    Weizmann Institute of Science, Physics, Rehovot, Israel
  • C. Benabderrahmane
    ESRF, Grenoble, France
  • S. Bielawski, C. Evain, E. Roussel, C. Szwaj
    PhLAM/CERLA, Villeneuve d’Ascq, France
  • S. Corde, J. Gautier, J.-P. Goddet, O.S. Kononenko, G. Lambert, K. Ta Phuoc, A. Tafzi, C. Thaury
    LOA, Palaiseau, France
  Laser plasma acceleration (LPA) with up to several GeV beam in very short distance appears very promising. The Free Electron Laser (FEL), though very challenging, can be viewed as a qualifying application of these new emerging LPAs. The energy spread and divergence, larger than from conventional accelerators used for FEL, have to be manipulated to fulfil the FEL requirements. On the test experiment COXINEL (ERC340015), the beam is controlled in a manipulation [1,2] line, using permanent magnet quadrupoles of variable strength [3] for emittance handing and a decompression chicane equipped with a slit for the energy selection, enabling FEL amplification for baseline reference parameters [2]. The electron position and dispersion are independently adjusted [4]. The measured spontaneous emission radiated by a 2 m long 18 mm period cryo-ready undulator exhibits the typical undulator spatio-spectral pattern, in agreement with the modelling of the electron beam travelling along the line and of the afferent photon generation. The wavelength is easily tuned with undulator gap variation. A wavelength stability of 2.6% is achieved. The undulator linewidth can be controlled.
[1] A. Loulergue et al., New J. Phys. 17 023028 (2015)
[2] M. E. Couprie et al., PPCF 58, 3 (2016)
[3] F. Marteau et al., APL 111, 253503 (2017)
[4] T. André et al., Nature Comm. 1334 (2018)
DOI • reference for this paper ※  
About • paper received ※ 13 August 2019       paper accepted ※ 16 September 2019       issue date ※ 05 November 2019  
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