Position reconstruction in LUX

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Title: Position reconstruction in LUX
Authors: Akerib, DS
Alsum, S
Araujo, HM
Bai, X
Bailey, AJ
Balajthy, J
Beltrame, P
Bernard, EP
Bernstein, A
Biesiadzinski, TP
Boulton, EM
Bras, P
Byram, D
Cahn, SB
Carmona-Benitez, MC
Chan, C
Currie, A
Cutter, JE
Davison, TJR
Dobi, A
Druszkiewicz, E
Edwards, BN
Fallon, SR
Fan, A
Fiorucci, S
Gaitskell, RJ
Genovesi, J
Ghag, C
Gilchriese, MGD
Hall, CR
Hanhardt, M
Haselschwardt, SJ
Hertel, SA
Hogan, DP
Horn, M
Huang, DQ
Ignarra, CM
Jacobsen, RG
Ji, W
Kamdin, K
Kazkaz, K
Khaitan, D
Knoche, R
Larsen, NA
Lenardo, BG
Lesko, KT
Lindote, A
Lopes, MI
Manalaysay, A
Mannino, RL
Marzioni, MF
McKinsey, DN
Mei, D-M
Mock, J
Moongweluwan, M
Morad, JA
Murphy, ASJ
Nehrkorn, C
Nelson, HN
Neves, F
O'Sullivan, K
Oliver-Mallory, KC
Palladino, KJ
Pease, EK
Rhyne, C
Shaw, S
Shutt, TA
Silva, C
Solmaz, M
Solovov, VN
Sorensen, P
Sumner, TJ
Szydagis, M
Taylor, DJ
Taylor, WC
Tennyson, BP
Terman, PA
Tiedt, DR
To, WH
Tripathi, M
Tvrznikova, L
Uvarov, S
Velan, V
Verbus, JR
Webb, RC
White, JT
Whitis, TJ
Witherell, MS
Wolfs, FLH
Xu, J
Yazdani, K
Young, SK
Zhang, C
Item Type: Journal Article
Abstract: The (x, y) position reconstruction method used in the analysis of the complete exposure of the Large Underground Xenon (LUX) experiment is presented. The algorithm is based on a statistical test that makes use of an iterative method to recover the photomultiplier tube (PMT) light response directly from the calibration data. The light response functions make use of a two dimensional functional form to account for the photons reflected on the inner walls of the detector. To increase the resolution for small pulses, a photon counting technique was employed to describe the response of the PMTs. The reconstruction was assessed with calibration data including ⁸³mKr (releasing a total energy of 41.5 keV) and ³H (β− with Q = 18.6 keV) decays, and a deuterium-deuterium (D-D) neutron beam (2.45 MeV) . Within the detector's fiducial volume, the reconstruction has achieved an (x, y) position uncertainty of σ = 0.82 cm and σ = 0.17 cm for events of only 200 and 4,000 detected electroluminescence photons respectively. Such signals are associated with electron recoils of energies ~0.25 keV and ~10 keV, respectively. The reconstructed position of the smallest events with a single electron emitted from the liquid surface (22 detected photons) has a horizontal (x, y) uncertainty of 2.13 cm.
Issue Date: 1-Feb-2018
Date of Acceptance: 20-Jan-2018
ISSN: 1748-0221
Publisher: IOP Publishing
Journal / Book Title: Journal of Instrumentation
Volume: 13
Copyright Statement: © 2018 IOP Publishing Ltd and Sissa Medialab. This is an author-created, un-copyedited version of an article accepted for publication in the Journal of Instrumentation. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at
Keywords: Science & Technology
Instruments & Instrumentation
Dark Matter detectors (WIMPs, axions, etc.)
Liquid detectors
Charge transport, multiplication and electroluminescence in rare gases and liquids
Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc)
Nuclear & Particles Physics
Publication Status: Published
Article Number: ARTN P02001
Appears in Collections:Physics
High Energy Physics
Faculty of Natural Sciences

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