Effect of Phantom Thickness Variation on Speed and Efficiency for Different MC Codes

LIN Hui; CHEN Dong-ying; WU Dong-sheng; LI Guo-li; JING Jia

doi:10.11804/NuclPhysRev.25.02.154

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Article Navigation > Nuclear Physics Review > 2008 > 25(2): 154-159

LIN Hui, CHEN Dong-ying, WU Dong-sheng, LI Guo-li, JING Jia. Effect of Phantom Thickness Variation on Speed and Efficiency for Different MC Codes[J]. Nuclear Physics Review, 2008, 25(2): 154-159. doi: 10.11804/NuclPhysRev.25.02.154

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LIN Hui, CHEN Dong-ying, WU Dong-sheng, LI Guo-li, JING Jia. Effect of Phantom Thickness Variation on Speed and Efficiency for Different MC Codes[J]. Nuclear Physics Review, 2008, 25(2): 154-159. doi: 10.11804/NuclPhysRev.25.02.154

Effect of Phantom Thickness Variation on Speed and Efficiency for Different MC Codes

doi: 10.11804/NuclPhysRev.25.02.154

1 College of Science, Hefei University of Technology, Hefei 230009, China;2 R & D Administration Division of Science and Techology, Hefei University of Technology, Hefei 230009, China;3 School of Computer & Information, Hefei University of Technology, Hefei 230009, China;4 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2008-06-20

Abstract

The effect of the phantom thickness on the simulation speed and efficiency of Monte Carlo (MC) codes, MCNP4c, DOSXYZnrc, DOSRZnrc and DPM, is investigated. The result shows that the increases of the simulation speed for different MC codes are distinct difference with dicreasing the phantom thickness, in which DOSXYZnrc is the most one, and DOSRZnrc is the least one. In the viewpoint of MC efficiency, DPM and DOSRZnrc have the remarkable advantages over others; and the efficiency for the thinner phantom shows the consistent advantage over the thicker one for these MC codes. In the viewpoint of MC efficiency increase, MCNP4c, DOSXYZnrc and DOSRZnrc show the same comparability, but DPM shows relatively low characteristics. The strange characteristics of DOSRZnrc in statistical uncertainty, speed increase are further investigated to find that it is due to the photon forcing VRT (variance reduction technique) implemented in it. This VRT reduces the statistical uncertainty, but it also weakens the speed advantage of the thinner phantom. However it is due to the remarkably under estimate of the variance on the interest region, the MC efficiency of DOSRZnrc is still increasing for the thinner phantom.
- Monte Carlo code,
- phantom thickness,
- calculation speed,
- Monte Carlo efficiency
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Effect of Phantom Thickness Variation on Speed and Efficiency for Different MC Codes

doi: 10.11804/NuclPhysRev.25.02.154

1 College of Science, Hefei University of Technology, Hefei 230009, China;2 R & D Administration Division of Science and Techology, Hefei University of Technology, Hefei 230009, China;3 School of Computer & Information, Hefei University of Technology, Hefei 230009, China;4 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2008-06-20

Key words:

Abstract: The effect of the phantom thickness on the simulation speed and efficiency of Monte Carlo (MC) codes, MCNP4c, DOSXYZnrc, DOSRZnrc and DPM, is investigated. The result shows that the increases of the simulation speed for different MC codes are distinct difference with dicreasing the phantom thickness, in which DOSXYZnrc is the most one, and DOSRZnrc is the least one. In the viewpoint of MC efficiency, DPM and DOSRZnrc have the remarkable advantages over others; and the efficiency for the thinner phantom shows the consistent advantage over the thicker one for these MC codes. In the viewpoint of MC efficiency increase, MCNP4c, DOSXYZnrc and DOSRZnrc show the same comparability, but DPM shows relatively low characteristics. The strange characteristics of DOSRZnrc in statistical uncertainty, speed increase are further investigated to find that it is due to the photon forcing VRT (variance reduction technique) implemented in it. This VRT reduces the statistical uncertainty, but it also weakens the speed advantage of the thinner phantom. However it is due to the remarkably under estimate of the variance on the interest region, the MC efficiency of DOSRZnrc is still increasing for the thinner phantom.

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