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Title: A Transport Condensed History Algorithm for Electron Monte Carlo Simulations

Abstract

An advanced multiple scattering algorithm for the Monte Carlo simulation of electron transport problems is developed. Unlike established multiple scattering algorithms, this new method, called transport condensed history (TCH), is a true transport process - it simulates a transport equation that approximates the exact Boltzmann transport process. In addition to having a larger mean free path and a more isotropic scattering operator than the Boltzmann equation, the approximate transport equation also preserves the zeroth- and first-order angular moments of the exact equation. These features enable TCH to accurately predict electron position as a function of energy (path length) and to move particles across material boundaries and interfaces with acceptable accuracy and efficiency. Numerical results and dose calculations are shown to reveal the advantages of TCH over conventional condensed history schemes.

Authors:
 [1];  [2]
  1. Lawrence Livermore National Laboratory (United States)
  2. University of Michigan (United States)
Publication Date:
OSTI Identifier:
20804732
Resource Type:
Journal Article
Journal Name:
Nuclear Science and Engineering
Additional Journal Information:
Journal Volume: 139; Journal Issue: 1; Other Information: Copyright (c) 2006 American Nuclear Society (ANS), United States, All rights reserved. http://epubs.ans.org/; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0029-5639
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ACCURACY; ALGORITHMS; BOLTZMANN EQUATION; CHARGED-PARTICLE TRANSPORT; COMPUTERIZED SIMULATION; EFFICIENCY; ELECTRONS; ENERGY DEPENDENCE; MEAN FREE PATH; MONTE CARLO METHOD; MULTIPLE SCATTERING; TRANSPORT THEORY

Citation Formats

Tolar, Jr, Danny R, and Larsen, Edward W. A Transport Condensed History Algorithm for Electron Monte Carlo Simulations. United States: N. p., 2001. Web.
Tolar, Jr, Danny R, & Larsen, Edward W. A Transport Condensed History Algorithm for Electron Monte Carlo Simulations. United States.
Tolar, Jr, Danny R, and Larsen, Edward W. 2001. "A Transport Condensed History Algorithm for Electron Monte Carlo Simulations". United States.
@article{osti_20804732,
title = {A Transport Condensed History Algorithm for Electron Monte Carlo Simulations},
author = {Tolar, Jr, Danny R and Larsen, Edward W},
abstractNote = {An advanced multiple scattering algorithm for the Monte Carlo simulation of electron transport problems is developed. Unlike established multiple scattering algorithms, this new method, called transport condensed history (TCH), is a true transport process - it simulates a transport equation that approximates the exact Boltzmann transport process. In addition to having a larger mean free path and a more isotropic scattering operator than the Boltzmann equation, the approximate transport equation also preserves the zeroth- and first-order angular moments of the exact equation. These features enable TCH to accurately predict electron position as a function of energy (path length) and to move particles across material boundaries and interfaces with acceptable accuracy and efficiency. Numerical results and dose calculations are shown to reveal the advantages of TCH over conventional condensed history schemes.},
doi = {},
url = {https://www.osti.gov/biblio/20804732}, journal = {Nuclear Science and Engineering},
issn = {0029-5639},
number = 1,
volume = 139,
place = {United States},
year = {Sat Sep 15 00:00:00 EDT 2001},
month = {Sat Sep 15 00:00:00 EDT 2001}
}