Bochum 2018 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 51: Instrumentation XVI

HK 51.3: Talk

Thursday, March 1, 2018, 14:45–15:00, HZO 90

High Resolution Neutron Detection by the yTPC method — •Markus Köhli^1,2, Markus Gruber¹, Fabian Schmidt¹, Jochen Kaminski¹, and Klaus Desch¹ — ¹Physikalisches Institut, Universität Bonn, Bonn, Germany — ²Physikalisches Institut, Universität Heidelberg, Heidelberg, Germany

The world of detectors used in thermal neutron scattering instrumentation has changed. By alerts on the future Helium-3 supply, critical to perspectives of the large-scale research infrastructures, the run on substitutional technologies started. Most of the solutions could be adapted from developments of particle physics and are comprised of one or more layers of Boron-10. The Time Projection Method achieves a very high resolution by projecting ionization tracks onto a readout with dense spatial and time information. The University of Bonn is developing a novel system employing the TimePix technology - CMOS based chips with 55 µm sized pixels operated at clock speeds up to 80 MHz. In a first prototype with 8 TimePix chips, which are arranged in parallel to a boron layer, the track topology with this unrivaled high resolution has been studied. By reconstructing the origin of the conversion ions a time resolution below 50 ns and a spatial resolution of 100 µm has been achieved.