Monte Carlo calculation of deep penetration benchmark sensitivities

Abstract

General neutronic and photonic Monte Carlo calculations have by now become quite popular. Monte Carlo calculation of sensitivities, nevertheless, necessitates special methods. Yet these methods have so far been only applied to certain particular problems such as reaction rates in a given spatial region, and are not widely known in the user community. One such method, the Differential Operator Method due to MCG Hall, has been extended to the calculation of sensitivities of point detectors. This incidentally enables the concurrent calculation of the detector response and its sensitivities. A brief exposition of the method is presented, followed by its application to several deeppenetration benchmark experiments for which the sensitivities to iron cross sections of some relevant responses are evaluated.

A GPU‐based fast Monte Carlo code that supports proton transport in magnetic field for radiation therapy

“…Table 1 shows the computation time and 3D γ‐test passing rates between ARCHER and TOPAS. The quantity $$\overline {\sigma /D} $$ indicates the achieved simulation precision which is defined in Jia et al 17 . In the 2 mm/2% criterion, the dose percentage threshold is set to 2% and the distance threshold is set to 2 mm.…”

“…The quantity indicates the achieved simulation precision which is defined in Jia et al. 17 In the 2 mm/2% criterion, the dose percentage threshold is set to 2% and the distance threshold is set to 2 mm. 1 mm/1% criterion is a stricter one which is applied here to further demonstrate the accuracy of ARCHER.…”

“…In addition to these two oversimplified algorithms, GPU‐based full MC simulation code had been reported by several groups. 12 , 13 , 14 , 15 , 16 What they all have in common is that instead of stimulating a huge number of elastic Coulomb interactions, the Class II condensed history algorithm 17 was implemented. The main distinction between these approaches lies in the nuclear interactions.…”

Monte Carlo simulation of ruthenium eye plaques with GEANT4: influence of multiple scattering algorithms, the spectrum and the geometry on depth dose profiles

“…For charged particles such as electrons or muons, this is usually not possible since they interact with every atom in their way. Therefore, condensed history approaches were developed (Berger 1963). These approaches combine several interactions into a single step, which leads to a reduction in the simulation time of several orders of magnitude.…”

Sensitivity of adjustment to response-parameter correlations

“…This has indeed been done in ref. [7], and is reproduced here, as figure 1, in graphic form. We may also add that for realistic, multi-group non-isotropic scattering, bare spheres the graph is still valid, provided both c and Σ are the respective transport corrected, properly averaged one-group values.…”