Computational model for coupled electron-photon transport in two dimensions

Details Computational model for coupled electron-photon transport in two dimensions Computational model for coupled electron-photon transport in two dimensions

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996phrve..53.6514d&link_type=abstract

Physical Review E (Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics), Volume 53, Issue 6, June 1996, p

Statistics

Computation

Computational Techniques, Simulations, Radiative Transfer, Scattering

Scientific paper

We have developed a method to perform coupled electron-photon calculations in two spatial dimensions using a partial coupling scheme in which electrons produce photons but photons do not produce electrons. A spatial characteristic scheme is used in conjunction with a second order differencing scheme in energy. The multigroup Legendre cross sections are calculated using the cross section generating code CEPXS, which models a large number of electron interactions including elastic scattering from nuclei, inelastic scattering from collisions with atomic electrons, and radiative scattering from nuclei, and photon interactions such as Compton incoherent scattering, photoelectric absorption, and pair interaction. A two-dimensional calculation performed to simulate results from an experiment in which energy deposition depends only on the depth inside the medium compares very favorably with experimental data. Energy deposition profiles are also obtained for monoenergetic electron sources isotropically incident on aluminum and are compared with TIGER Monte Carlo calculations. Agreement between the two sets of calculations is found to be excellent. In summary, we conclude that our computational model is capable of providing very good results for energy deposition due to an incident source of electrons in two-dimensional rectangular geometry.

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