Transmission calculation by empirical numerical model and Monte Carlo simulation in high energy proton radiography of thick objects

An empirical numerical model that includes nuclear absorption, multiple Coulomb scattering and energy loss is presented for the calculation of transmission through thick objects in high energy proton radiography. In this numerical model the angular distributions are treated as Gaussians in the labor...

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Bibliographic Details
Published in:Chinese physics C 2015-10, Vol.39 (10), p.127-130
Main Author: 郑娜 许海波
Format: Article
Language:English
Subjects:
Carbon
Computer simulation
Empirical analysis
Energy transmission
Gaussian
Geant4
Mathematical models
Monte Carlo methods
Radiography
传输
数值模型
蒙特卡罗模拟
蒙特卡罗程序
计算
质子照相
高能量
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Summary:An empirical numerical model that includes nuclear absorption, multiple Coulomb scattering and energy loss is presented for the calculation of transmission through thick objects in high energy proton radiography. In this numerical model the angular distributions are treated as Gaussians in the laboratory frame. A Monte Carlo program based on the Geant4 toolkit was developed and used for high energy proton radiography experiment simulations and verification of the empirical numerical model. The two models are used to calculate the transmission fraction of carbon and lead step-wedges in proton radiography at 24 GeV/c, and to calculate radial transmission of the French Test Object in proton radiography at 24 GeV/c with different angular cuts. It is shown that the results of the two models agree with each other, and an analysis of the slight differences is given.
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/39/10/108201