Details

Autor(en) / Beteiligte

• Jaegle, I.
• Lewis, P.M.
• Garcia-Sciveres, M.
• Hedges, M.T.
• Hemperek, T.
• Janssen, J.
• Ji, Q.
• Pohl, D.-L.
• Ross, S.
• Schueler, J.
• Seong, I.
• Thorpe, T.N.
• Vahsen, S.E.

Titel

Compact, directional neutron detectors capable of high-resolution nuclear recoil imaging

Ist Teil von

• Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 2019-11, Vol.945 (C), p.162296, Article 162296

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We report on the design, production, and performance of compact 40-cm3 Time Projection Chambers (TPCs) that detect fast neutrons by measuring the three-dimensional (3D) ionization distribution of nuclear recoils in 4He:CO2 gas at atmospheric pressure. We use these detectors to characterize the fast-neutron flux inside the Belle II detector at the SuperKEKB electron–positron collider in Tsukuba, Japan, where the primary design constraint is a small form factor. We find that the TPCs meet or exceed all design specifications, and are capable of measuring the 3D surface shape and charge density profile of ionization clouds from nuclear recoils and charged tracks in exquisite detail. Scaled-up detectors based on the detection principle demonstrated here may be suitable for directional dark matter searches, measurements of coherent neutrino–nucleus scattering, and other experiments requiring precise detection of neutrons or nuclear recoils.