A weight (charge) conserving importance-weighted comb for Monte Carlo

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Importance-weighted combing techniques can be used to control particle populations through-out a problem with widely varying importances. However, a naive importance-weighted comb does not preserve the total particle weight. This is generally unimportant for neutron and photon transport. However, this can be very important in simulations of charged particles where the particles are generating the electric field that they are being transported through. From a Monte Carlo standpoint, preserving the expected weight by a combing technique produces an unbiased result. However, there may be a serious degradation to the physics of the problem if total charge is not exactly conserved. ... continued below

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11 p.

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Booth, T.E. March 1, 1996.

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Description

Importance-weighted combing techniques can be used to control particle populations through-out a problem with widely varying importances. However, a naive importance-weighted comb does not preserve the total particle weight. This is generally unimportant for neutron and photon transport. However, this can be very important in simulations of charged particles where the particles are generating the electric field that they are being transported through. From a Monte Carlo standpoint, preserving the expected weight by a combing technique produces an unbiased result. However, there may be a serious degradation to the physics of the problem if total charge is not exactly conserved. This paper describes a combing method that preserves the total weight and hence & total charge.

Physical Description

11 p.

Notes

OSTI as DE96007192

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  • American Nuclear Society (ANS) Radiation Protection and Shielding Division topical meeting on advancements and applications in radiation protection and shielding, Falmouth, MA (United States), 21-25 Apr 1996

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  • Other: DE96007192
  • Report No.: LA-UR--96-0051
  • Report No.: CONF-960415--10
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 204256
  • Archival Resource Key: ark:/67531/metadc672973

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Office of Scientific & Technical Information Technical Reports

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  • March 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • June 24, 2016, 1:58 p.m.

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Booth, T.E. A weight (charge) conserving importance-weighted comb for Monte Carlo, article, March 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc672973/: accessed December 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.