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Proceedings/Recueil Des Communications EPJ Web of Conferences Année : 2023

Methodology for an experimental drift velocity determination using a μTPC. Example in a 700mbar 95%He+5%CO2 mixture

Résumé

The micro-irradiation, neutron metrology and dosimetry laboratory of the Institute for Radiological Protection and Nuclear Safety (IRSN) is a National Metrological Institute associated laboratory, is in charge of the neutron fluence distribution references and produces neutron reference fields. The laboratory is developing a primary neutron-detector based on the use of Time Projection Chamber technology. This detector, called µTPC, can use different types of gas over a range of precise pressures. The analysis of TPC data requires the determination of both the energy and the track direction of the recoil particles. The drift velocity in the gas is a key data point for analysis. Based on several experimental measurements performed using the µTPC with monoenergetic neutron fields, a direct methodology to determine the drift velocity can be proposed. These results are compared with those found using theoretical drift velocity from the Magboltz simulation.
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irsn-04417603 , version 1 (25-01-2024)

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Thibaut Vinchon, Michael Petit. Methodology for an experimental drift velocity determination using a μTPC. Example in a 700mbar 95%He+5%CO2 mixture. ANIMMA 2023 – Advancements in Nuclear Instrumentation Measurement Methods and their Applications, EPJ Web of Conferences, 288 (10016), pp.5, 2023, ⟨10.1051/epjconf/202328810016⟩. ⟨irsn-04417603⟩

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