Brem converter optimization
The optimization of the photon yield from Al bremsstrahlung converter was simulated using Geant4 for the incident electrons with the energy E = 10.5 MeV and U-238 target.
The total cross section for U-238 target was taken fron nndc/BNL web site and provided below:
Since the electron energy is 10.5 MeV the photons will have maximum energy of 10.5 MeV. The information on the photofission cross section was obtained for the photon energies in the range of 5 MeV 10.5 MeV using polynomial fit and presented below for the magnified region of the U-238 cross section vs photon energy plot:
The photon yield as a function of the photon energy simulated for different bremsstrahlung converter lengths is provided below. In each case of the converter length the number of the incident electrons was equal to .
