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Design of the Photon Collimators for the ILC Positron Helical Undulator.

Research output: Working paper


  • A. B. Bungau
  • E. Baynham
  • T. W. Bradshaw
  • A. Brummitt
  • F. S. Carr
  • J. A. Clarke
  • N. A. Collomb
  • J. Dainton
  • A. F. Hartin
  • S. Hesselbach
  • K. M. Hock
  • L. J. Jenner
  • A. Lintern
  • O. B. Malyshev
  • L. I. Malysheva
  • G. A. Moortgat-Pick
  • J. Rochford
  • N. C. Ryder
  • D. J. Scott
  • L. Zang
Publication date10/08/2008
<mark>Original language</mark>English


A number of photon collimators are placed inside the helical undulator to protect the cold surfaces of the vacuum vessel from being hit by the photons and thus achieving the baseline pressure requirement. Computer simulations were run in order to determine the energy deposition and instantaneous temperature rise in these collimators and various material candidates were studied. This paper presents the status of the simulation.