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

TL;DR

This paper presents an empirical numerical model and a Monte Carlo simulation to accurately calculate proton transmission through thick objects in high energy radiography, validated against experimental data.

Contribution

It introduces a new empirical model incorporating nuclear effects and a Monte Carlo simulation for high energy proton radiography, with validation against experiments.

Findings

Both models accurately reproduce experimental transmission data.

The empirical model effectively accounts for nuclear absorption and scattering.

Monte Carlo simulation confirms the empirical model's reliability.

Abstract

An empirical numerical model that includes nuclear absorption, multiple Coulomb scattering, and energy loss is presented in this work to calculate the transmission of the thick objects in high energy proton radiography, and in this numerical model the angular distributions are treated as Gaussians in the laboratory frame. A Monte Carlo program based on Geant4 toolkit was developed using for the high energy proton radiography experiment simulation, and verifying the empirical numerical model. The two models are used to calculate the transmission fraction of the step-wedge of carbon and lead in proton radiography at 24GeV/c. The two models can reproduce the experiment data, and the differences are analyzed.