Mainz 2022 – scientific programme
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 14: Posters
AKBP 14.2: Poster
Thursday, March 31, 2022, 16:00–17:30, P
Future Neutron Beam Line at the Bonn Isochronous Cyclotron — •Maximilian Loepke and Reinhard Beck — Helmholtz-Institut für Strahlen- und Kernphysik Bonn
The Bonn Isochronous Cyclotron provides a beam of protons, deuterons or ions up to 12C4+ with a kinetic energy ranging from 7 to 14 MeV per nucleon. Since 2019 the proton beam is utilized for irradiation of e.g. silicon pixel detectors for radiation hardness tests.
Currently, it is planned to extend the facility’s irradiation and experimentation capabilities by providing a neutron beam. The neutrons are produced by converting deuterons into protons and neutrons in a thick carbon or berylium target. Protons are stopped by the target whereas the neutrons, are subsequently collimated and can be used for irradiation of a secondary target.
The angular distribution of neutrons from this stripping reaction is peaked forward and the energy of neutrons emerging at 0 degree is around 0.4 times the deuteron energy for deuterons in this energy range. The neutron flux at the secondary target after collimation has been estimated using simulations with Geant4 and experimental data found in literature to be in the order of 107 n/cm2/s.