Details

Autor(en) / Beteiligte

• Itay, R.
• Szabo, P.Z.
• Koltman, G.
• Devi, M.M.
• Shutman, M.
• Landsman, H.
• Budnik, R.

Titel

DIREXENO—an apparatus for measuring correlated scintillation signatures in liquid xenon

Ist Teil von

• Journal of instrumentation, 2020-06, Vol.15 (6), p.T06001-T06001

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We present a detector apparatus, DIREXENO (DIREctional XENOn), designed to measure the spatial and temporal properties of scintillation in liquid xenon to very high accuracy. The properties of scintillation are of primary importance for dark matter and neutrinoless double beta decay experiments; however the complicated microphysics involved limits theoretical predictions. We will explore the possibility that scintillation emission exhibits spatial correlations such as super-radiance which manifests in temporal and spatial structure, depending on the interaction type. Such properties of scintillation light may open a new window for background rejection as well as directionality measurements. We present the apparatus' technical design and the concepts driving it. We demonstrate that for an energy deposition of ∼2.5 keV (∼7.5 keV) electron (nuclear) recoil the detector is sensitive to an anisotropy fraction of as little as ∼ 20% of the total photons emitted over a solid angle of ∼0.85 steradian or less. We show results from commissioning runs in which the detector operated with 17 PMTs for over 44 days in stable conditions. The time resolution for individual photons in different PMTs was measured to be ≲1.4 ns full-width at half-maximum