A Fokker-Planck method for modeling compton scattering in implicit Monte Carlo simulations Conference Paper uri icon

abstract

  • We present a new method for modeling Compton scattering in Implicit Monte Carlo (IMC) simulations that implicitly evaluates the radiation-matter energy coupling due to photon-electron scattering. In this technique, the scattering physics are split from the radiative-transfer process and represented by a Fokker-Planck approximation. In each time step, radiative transfer, minus Compton scattering, is simulated using the usual IMC method. The results of this calculation are then used to solve the Fokker-Planck equation deterministically and update the material temperature and radiation intensity accordingly. With a set of numerical examples, we demonstrate that our new Fokker-Planck method is able to employ larger time steps than an analog technique for simulating Compton scattering that evaluates the material temperature explicitly.

published proceedings

  • Joint International Topical Meeting on Mathematics and Computations and Supercomputing in Nuclear Applications, M and C + SNA 2007

author list (cited authors)

  • Densmore, J. D., Warsa, J. S., & Morel, J. E.

complete list of authors

  • Densmore, JD||Warsa, JS||Morel, JE

publication date

  • December 2007