SMuK 2023 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 25: Instrumentation VIII

HK 25.5: Vortrag

Mittwoch, 22. März 2023, 15:00–15:15, SCH/A.101

A neutron trigger detector for pulsed neutron sources — •Julian Auler for the tauSPECT collaboration — Institut für Physik, Johannes Gutenberg-Universität, Mainz

A variety of experiments investigating properties of neutrons can be performed at pulsed source facilities like the research reactor TRIGA Mainz. A typical problem faced by these experiments is the non-availibility of a reliable facility-provided trigger signal in coincidence with the neutron production. Here we present the design, implementation and experimental results of a neutron pulse detector that provides a coincident trigger signal for precise experimental timing.

The described neutron pulse detector is based on a multilayer design with a ¹⁰B top layer (∼ 80 nm) employing the ¹⁰B(n,α)⁷Li reaction and deposited on a scintillator foil (0.25 mm) with a one-sided coating of ZnS(Ag) as scintillation layer. A silicon photomultiplier (SiPM) is used as photosensor, which makes the detector suitable for use in experimental areas with high magnetic fields and at the same time has the advantage that no high-voltage supply is required.