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• Purpose of the code :

  The PHOTON program performs a Monte-Carlo simulation of photon flux on the vacuum-chamber wall around a storage ring or transport line. The simulation includes synchrotron radiation in dipoles and quadrupoles, the effects of closed orbit distortions, beam size and divergence, etc. The photon energies are determined following the algorithm proposed by Roy. The program requires 4 input files: (1) a look-up table for the SR spectrum, (2) a MAD twiss tape file which describes the beam optics - this can of course include optics imperfections - , (3) a file with magnet apertures, (4) a parameter input file. The latter contains, e.g., the beam emittances, energy, particle type, and various simulation flags.

  
  

• Authors :

  Frank Zimmermann

  
  

• Contact persons :

  Frank Zimmermann (CERN)

  
  

• Programming language :

  FORTRAN77

  
  

• Operating system :

  linux

  
  

• Homepage :

  The Photon Program
  
  

• Simulation code :

  PHOTON code tar file
  
  

• Examples :

  Simulations for ILC damping rings presented at ECLOUD'04
  
  

• Documentation :

  PHOTON documentation
  
  

• Special model features :

  
  

• Accelerators for which this code was/is used :

  LHC, ILC, CLIC

  
  

• Benchmarking against other codes :

  
  

• Benchmarking against accelerator experiments :

  
  

• Special programming features :

  Monte-Carlo simulation

  
  

• Comments :

  Actual optics and optics errors are taken into account when photons are emitted. Reflectivity of the chamber can be defined. Antechamber option is included.

  
  

• References :

  Reference page
  
  

• Categories :

  Synchrotron Radiation
  

Copyright CERN -- Cécile Lapoire, Romain Basset, Frank Zimmermann , Francesco Ruggiero