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Collignon, D.

Paper Title Page
THPAN013 Computer-assisted Electron Beam Characterization at AIRIX Facility 3250
  • O. Mouton, M. Caron, F. Cartier, D. Collignon, G. Grandpierre, D. Guilhem, L. Hourdin, M. Mouillet, C. Noel, D. Paradis, O. Pierret
    CEA, Pontfaverger-Moronvilliers
  AIRIX is a high current accelerator designed for flash X-ray radiography. The electron beam produced into a vacuum diode (2 kA, 3.5 to 3.8 MV, 60 ns) is extracted from a velvet cold cathode. For a complete beam characterisation at the diode output the following set of data is required: the primary beam current intensity, the primary beam energy, the 2D mean beam divergence, the 2D RMS beam size as well as the 2D transverse beam emittance. Part of these parameters is experimentally given by electrical sensors located into the beam line (I), by time resolved energy spread measurements (E) as well as by a classical beam imaging set-up (XRMS, YRMS). Unfortunately, XRMS and YRMS are measured downstream the diode output. Therefore, in order to get the relevant beam parameters at the right location (diode output) numerical data treatments are required. The TRAJENV beam transport code, coupled with the MINUIT minimization library, computes the unknown beam parameters at the diode output. In this paper, we propose to describe both experimental and theoretical approaches leading to the full beam characterization at the diode output.