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Lutman, A.A.

Paper Title Page
MOPA02 Recent Commissioning Experience on the FERMI@Elettra First Bunch Compressor Area: Investigations of Beam Dynamics, Modeling and Control Software 26
 
  • S. Di Mitri, E. Allaria, R. Appio, L. Badano, D. Castronovo, M. Cornacchia, P. Craievich, S. Ferry, L. Froehlich, S.V. Milton, G. Penco, C. Scafuri, C. Spezzani, M. Trovò, M. Veronese
    ELETTRA, Basovizza
  • R. Bartolini
    Diamond, Oxfordshire
  • G. De Ninno, S. Spampinati
    University of Nova Gorica, Nova Gorica
  • P. Evtushenko
    JLAB, Newport News, Virginia
  • W.M. Fawley
    LBNL, Berkeley, California
  • L. Giannessi
    ENEA C.R. Frascati, Frascati (Roma)
  • A.A. Lutman
    DEEI, Trieste
  • M. Sjöström
    MAX-lab, Lund
  
 

Some experiences have recently been collected from the FERMI@elettra Free Electron Laser first bunch compressor area. This includes a magnetic compressor, diagnostics for the characterization of the longitudinal and transverse phase space and suitable optics for matching to the downstream part of the linac. We report on the beam dynamics investigations in comparison with the modeling as well as the high level software control that has allowed this experience.

  
MOPB27 The Imperfectness of Electron Bunch Initial Longitudinal Phase Space on a Seeded Free Electron Laser Performance 87
 
  • J. Wu, J.J. Welch
    SLAC, Menlo Park, California
  • R.A. Bosch
    UW-Madison/SRC, Madison, Wisconsin
  • B. Jia
    FEL/Duke University, Durham, North Carolina
  • A.A. Lutman
    DEEI, Trieste
  
 

A single-pass high-gain x-ray free electron laser (FEL) calls for a high quality electron bunch. In particular, for a seeded FEL amplifier and for a harmonic generation FEL, the electron bunch initial energy profile uniformity and peak current uniformity are crucial for generating an FEL with a narrow bandwidth. After the acceleration, compression, and transportation, the electron bunch energy profile entering the undulator can acquire temporal non-uniformity both in energy and local density. We study the effects of the electron bunch initial energy profile non-uniformity and local density variation on the FEL performance. Intrinsically, for a harmonic generation FEL, the harmonic generation starts with an electron bunch having energy modulation as well as density bunching at the previous stage FEL wavelength and its harmonics. Its effect on the harmonic generation FEL in the radiator is then studied.