Typ

Konferenzposter

Gebiet

Detektorentwicklung

Autor

Thomas Block

Titel

High-resolution and High-rate Boron-lined Detectors for Neutron Science

Datum

2024-04

Reportnummer

—

Kurzfassung

The increase of the cost in Helium-3 has led to the use of solid state neutron converters in neutron detectors. Our group focuses on gaseous detectors based on solid Boron-10 converters, including large-scale readout electronics. Our detector developments feature high spatial and temporal resolution readouts and support high event rates with a wide range of active readout areas. We introduce three novel detector concepts, the current status of the development, characterization results and fututre plans of these detectors. The first design uses a combination of a borontated Microchannel Plate (MCP) and a Timepix3 ASIC with an active readout area of 2.8 cm x 2.8 cm. After a successful implementation [1] for the now discontinued Timepix ASIC, this upgrade not only increases the resolution of the detector but also guarantees the accessiblity in future uses. Currently, the mechanical consstruction is completed and the readout implementation studies are ongoing. The second detector combines the principle of a Time Projection Chamber (TPC) with a Boron-10 conversion stage. The conversion results in two daughter particles: Lithium ions and alpha particles. One of them is used for a scintillator-based trigger of the detector while the other creates a track of ion-electron pairs in the gas volume. This track is then readout by a Timepix ASIC. Scalability of this detector makes it a good candidate for scattering experiments or imaging. The development is currently on the final stages of the tests. Thridly, a detecctor with a boron-lined Gas Electron Multiplier (GEM), acting simultaneously as a conversion and signal amplification stage, is in development. It uses the VMM3 ASIC for its readout of events and has an active are of 10 cm x 10 cm, which is planned to expanded to an area of 30 cm x 30 cm in further stages of development. With up to ten layers, a highly granular readout, up-to-date multi-channel frontend ASICs, high neutron rates above 1e6/s can easily be achieved. Currently the construction of the first layer is still ongoing. References [1] A.S. Tremsin, J.V. Vellegra, O.H.W. Siegmund, J.S. Hull, W.B. Feller, E. Lehmann: High-resolution neutron radiography with microchannel plates: Proof-of-principle experiments at PSI, https://doi.org/10.1016/j.nima.2009.01.137

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