Akerib, DS;
Alsum, S;
Araujo, HM;
Bai, X;
Bailey, AJ;
Balajthy, J;
Beltrame, P;
... Zhang, C; + view all
(2018)
Position reconstruction in LUX.
Journal of Instrumentation
, 13
, Article P02001. 10.1088/1748-0221/13/02/P02001.
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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.
| Type: | Article |
|---|---|
| Title: | Position reconstruction in LUX |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1748-0221/13/02/P02001 |
| Publisher version: | https://doi.org/10.1088/1748-0221/13/02/P02001 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, 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), Gamma-Camera, Xenon, Emission, Detector |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10047748 |
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