Author: Feng, C.
Paper Title Page
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 ※ https://doi.org/10.18429/JACoW-FEL2019-MOA02  
About • paper received ※ 21 August 2019       paper accepted ※ 28 August 2019       issue date ※ 05 November 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUP087 Start-to-end Simulations of the Reflection Hard X-Ray Self-Seeding at the SHINE Project 254
 
  • T. Liu, X. Dong, C. Feng
    SARI-CAS, Pudong, Shanghai, People’s Republic of China
  
  The Shanghai high repetition rate XFEL and extreme light Facility (SHINE) project is designed to produce fully coherent X-ray photons covering the photon energy from 3 keV to 25 keV. We have reported our FEL proposal and schemes in the hard X-ray regime which is self-seeding based on the crystal monochromator previously. Comparing to the transmission self-seeding scheme, the reflection one has several advantages and might be the base proposal. Start-to-end (S2E) simulations from the beam generation by Astra, the linac accelerating by Elegant to the FEL simulation by Genesis are performed. In this manuscript, the FEL simulations based on the S2E beam will be presented mainly. The results demonstrate the feasibility of the reflection hard X-ray self-seeding at the SHINE project.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-TUP087  
About • paper received ※ 20 August 2019       paper accepted ※ 29 August 2019       issue date ※ 05 November 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEP089 Pulse Energy Measurement at the SXFEL 521
 
  • Z.P. Liu, H.X. Deng, C. Feng, B. Liu, D. Wang, L.Y. Yu
    SINAP, Shanghai, People’s Republic of China
  
  The test facility is going to generate 8.8 nm FEL radiation using an 840 MeV electron linac passing through the two-stage cascaded HGHG-HGHG or EEHG-HGHG (high-gain harmonic generation, echo-enabled harmonic generation) scheme. Several methods have been developed to measure the power of pulse. The responsivity of silicon photodiode having no loss in the entrance window. Silicon photodiode reach saturates at the SXFEL. In this work, we simulated the attenuator transmittance for different thicknesses. We also show the preparations of the experiment results at the SXFEL .  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-WEP089  
About • paper received ※ 20 August 2019       paper accepted ※ 28 August 2019       issue date ※ 05 November 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)