Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (03): 30205-030205.

• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS •

### Research on 1.6-GeV proton translation process using Geant4

YAO Zhiming SONG Guzhou HEI Dongwei MA Jiming ZHOU Ming DUAN Baojun SONG Yan HAN Changcai

1. (State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology,Xi’an 710024, China)
• Received:2013-10-04 Revised:2013-12-27 Online:2014-03-10 Published:2014-03-14

Abstract:

Backgroud: Chinese Spallation Neutron Source under construction consists of a proton accelerator which can speed up protons to 1.6 GeV. High-energy proton beams are used for radiography due to their high penetrability. Purpose: In order to understand how protons interact with materials when transmitting an object, the transport process of 1.6-GeV protons in different materials is simulated by Geant4. Methods: Energy loss, multiple coulomb scattering, inelastic and elastic collisions with nucleus are simulated independently by setting the physics process in Geant4. Beryllium, copper and tungsten are chosen as low-Z, middle-Z and high-Z material respectively. With respect to the effect of thickness, Tungsten of 5 g?cm?2, 10 g?cm?2 and 15 g?cm?2 is chosen as the material. Results: Number, energy and direction of motion are changed after protons penetrate an object. Changes are related to the composition and thickness of materials. Conclusion: The simulation results imply that transmission, energy-loss and distribution of scattering angle can reflect the thickness (in g?cm?2) and material composition of an object.