Köln 2025 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 5: Instrumentation II

HK 5.1: Vortrag

Montag, 10. März 2025, 15:00–15:15, SR Exp1B Chemie

Geant4 Simulations of a Neutron Irradiation Setup — •Maximilian Loepke, Reinhard Beck, Dieter Eversheim, and Dennis Sauerland — Helmholtz-Institut für Strahlen- und Kernphysik Bonn

The Bonn Isochronous Cyclotron provides a beam of protons, deuterons or α-particles with a kinetic energy ranging from 7 to 14 MeV per nucleon. Since 2019, a proton beam is utilized for irradiation of e.g. silicon pixel detectors for radiation hardness studies.

It is planned to extend the facility’s irradiation and experimentation capabilities by providing a neutron beam in the near future. The neutrons are produced by splitting-up deuterons into protons and neutrons in a thick target converter. Protons are stopped in the converter whereas the neutrons’ flux and angular energy distribution is optimized by a subsequent copper/tungsten collimator. After collimation, the neutron beam can be used for irradiation.

This talk gives an overview of Geant4 simulation results and literature comparisons regarding the neutron field, with its flux and energy distribution generated by light elements (Li, Be, C) being bombarded with protons, deuterons and α-particles compared against literature. Additionally, simulations concerning isotope production and dosimetry were carried out and are compared against experimental results.

Keywords: Geant4; Neutrons; Simulations; Deuteron