Simulation of proton radiography terminal at IMP

TL;DR

This paper presents the design and simulation of a proton radiography terminal at IMP, demonstrating its optical parameters, efficiency, and imaging resolution for static samples using various simulation tools.

Contribution

The paper introduces a detailed design and simulation of a 2.6 GeV proton radiography system, including beam optics and imaging performance analysis.

Findings

Transmission efficiency of 100% without target

Spatial resolution of approximately 36 micrometers

Thickness measurement differences within 10%

Abstract

Proton radiography is used for advanced hydrotesting as a new type radiography technology due to its powerful penetration capability and high detection efficiency. A new proton radiography terminal will be developed to radiograph static samples at Institute of Modern Physics of Chinese Academy of Science (IMP-CAS). The proton beam with the maximum energy of 2.6 GeV will be produced by Heavy Ion Research Facility in Lanzhou-Cooling Storage Ring (HIRFL-CSR). The proton radiography terminal consists of the matching magnetic lens and the Zumbro lens system. In this paper, the design scheme and all optic parameters of this beam terminal for 2.6GeV proton energy are presented by simulating the beam optics using WINAGILE code. My-BOC code is used to test the particle tracking of proton radiography beam line. Geant4 code and G4beamline code are used for simulating the proton radiography system. The results show that the transmission efficiency of proton without target is 100%, and the effect of secondary particles can be neglected. In order to test this proton radiography system, the proton images for an aluminum plate sample with two rectangular orifices and a step brass plate sample are respectively simulated using Geant4 code. The results show that the best spatial resolution is about 36{\mu}m, and the differences of the thickness is not greater than 10%.