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

ZHENG Na; XU Hai-Bo

doi:10.1088/1674-1137/39/10/108201

Chinese Physics C> 2015, Vol. 39> Issue(10) : 108201 DOI: 10.1088/1674-1137/39/10/108201

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

ZHENG Na ,
XU Hai-Bo ^,

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Abstract：
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.

References

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Aman J F, Espinoza C T, Gomez J J et al. Los Alamos National Laboratory, LA-UR-9801368, 1998[2] Mottershead C T, Zumbro J D. Magnetic Optics for Proton Radiography, in: Proceedings of the 1997 Particle Accelerator conference, Vancouver B C, Canada, 1997. 1397-1402[3] Zumbro J D, Acuff A, Bull J S et al. Radiation Protection Dosimetry, 2005, 117(ef{eq4}): 447-452[4] Agostinelliae S, Allisonas J, Amako K et al. Nuclear Instruments and Methods in Physics Research A, 2003, 506: 250-303[5] Schiz A et al. Phys. Rev. D, 1980, 21(11): 3010[6] Baoshev I S, Mokhov N V et al. Sov. J, Nucl. Phys., 1985, 42(ef{eq5}): 745[7] Neri F, Walstrom P L. Nuclear Instruments and Methods in Physics Research B, 2005, 229: 425-435

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ZHENG Na and XU Hai-Bo. Transmission calculation by empirical numerical model and Monte Carlo simulation in high energy proton radiography of thick objects[J]. Chinese Physics C, 2015, 39(10): 108201. doi: 10.1088/1674-1137/39/10/108201

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Received: 2014-10-20
Revised: 2015-06-01

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沈阳化工大学材料科学与工程学院沈阳 110142

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

ZHENG Na
XU Hai-Bo ^,

Corresponding author: XU Hai-Bo,

Received Date: 2014-10-20
Accepted Date: 2015-06-01
Available Online: 2015-10-10

Abstract: 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.