Time-step limits for a Monte Carlo Compton-scattering method

Conference · Thu Jan 01 00:00:00 EST 2009

OSTI ID:956438

Densmore, Jeffery D ^[1]; Warsa, James S ^[1]; Lowrie, Robert B ^[1]

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1. Los Alamos National Laboratory

We perform a stability analysis of a Monte Carlo method for simulating the Compton scattering of photons by free electron in high energy density applications and develop time-step limits that avoid unstable and oscillatory solutions. Implementing this Monte Carlo technique in multi physics problems typically requires evaluating the material temperature at its beginning-of-time-step value, which can lead to this undesirable behavior. With a set of numerical examples, we demonstrate the efficacy of our time-step limits.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 956438
• Report Number(s): LA-UR-09-01030; LA-UR-09-1030; TRN: US1004063
• Resource Relation: Conference: Int. Conf. on Mathematics, Computational Methods & Reactoer Physics ; May 3, 2009 ; Sarotoga Springs, NY
• Country of Publication: United States
• Language: English

Related Subjects

97 MATHEMATICS AND COMPUTING
COMPTON EFFECT
ELECTRONS
MONTE CARLO METHOD
PHOTONS
STABILITY
MATHEMATICS
TIME DEPENDENCE
LIMITING VALUES