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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 5: Hadron Accelerators

AKBP 5.3: Talk

Tuesday, March 21, 2023, 17:00–17:15, CHE/0184

Update on the Future Neutron Beam Line at the Bonn Isochronous Cyclotron — •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, α-particles or other light ions with a mass-to-charge ratio ≥ 1/2 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 carbon or beryllium 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 utilized to irradiate a target.

The transversal dimension, yield and energy distribution of the neutron beam has been estimated for different collimator geometries using simulations with Geant4 to optimize for radiation hardness tests.

This talk gives a conceptual overview of the future experimental area and results of the simulations are presented.