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Keywords: primary generator
Forum: Particles
Re: Question question about more than one primary particles (Meiling Yu)
Date: 09 Oct, 2003
From: michel maire <michel maire>

User Meiling Yu wrote:

>> Hi, I want to simulate a light source which emits optical photons with
>> different momentum, but the primary particle generator seems can only
>> generate particles with the same momentum.

  Of course, not. In examples/extended/electromagnetic/TestEm4 you have
  a random distribution of the incident direction, but you can change
  the energy or the vertex position as well.

  The difficulty with optical photon is that the polarisation of the
  initial photon must be defined. In novice/N06/src/PrimaryGeneratorAction,
  the function SetOptPhotonPolar() can be an example of what to do. 

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