Author: Barros, J.
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THPME088 Study of Phase Reconstruction Techniques applied to Smith-Purcell Radiation Measurements 3436
 
  • N. Delerue, J. Barros, M. Vieille Grosjean
    LAL, Orsay, France
  • O.A. Bezshyyko, V. Khodnevych
    National Taras Shevchenko University of Kyiv, The Faculty of Physics, Kyiv, Ukraine
 
  Funding: Work supported by the France-Ukraine high energy physics laboratory and by the Université Paris-Sud (programme “attractivité") and the French ANR (contract ANR-12-JS05-0003-01).
Measurements of coherent radiation at accelerators typically give the absolute value of the beam profile Fourier transform but not its phase. Phase reconstruction techniques such as Hilbert transform or Kramers Kronig reconstruction are used to recover such phase. We report a study of the performances of these methods and how to optimize the reconstructed profiles.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME088  
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THPME089 On the Suitability of Longitudinal Profile Measurements using Smith-Purcell Radiation for Short High Current Proton Beams 3439
 
  • J. Barros, N. Delerue, M. Vieille Grosjean
    LAL, Orsay, France
  • I. Dolenc Kittelmann
    ESS, Lund, Sweden
  • C.A. Thomas
    Lund University, Lund, Sweden
 
  Funding: Financially supported by the Université Paris-Sud (programme "attractivité") and the French ANR (contract ANR-12-JS05-0003-01).
The use of Smith-Purcell radiation to measure electrons longitudinal profiles has been demonstrated at several facilities in the picosecond and sub-picosecond range. There is a strong interest for the development of non intercepting longitudinal profile diagnostics for high current proton beams. We present here results of simulations on the expected yield of longitudinal profile monitors using Smith-Purcell radiation for such proton beams.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME089  
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THPME093 Reconstruction of Longitudinal Electrons Bunch Profiles at FACET, SLAC 3453
SUSPSNE079   use link to see paper's listing under its alternate paper code  
 
  • M. Vieille Grosjean, J. Barros, N. Delerue, S. Jenzer
    LAL, Orsay, France
  • F. Bakkali Taheri, G. Doucas, I.V. Konoplev, A. Reichold
    JAI, Oxford, United Kingdom
  • C.I. Clarke
    SLAC, Menlo Park, California, USA
 
  The E-203 collaboration is testing a device on FACET at SLAC to measure the longitudinal profile of electron bunches using Smith-Purcell radiation. At FACET the electron bunches have an energy of 20GeV and a duration of a few hundred femtoseconds. Smith-Purcell radiation is emitted when a charged particle passes close to the surface of a metallic grating. The set-up installed in FACET consists in four targets (three gratings and a blank) on a carrousel on one side and eleven pyroelectric detectors on the opposite side, the beam passing between. At the moment, the measurement is averaged over a hundred pulses or more. We have studied the stability of the measurement from pulse to pulse and the resolution of the measure depending on the number of grating used.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME093  
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