LUX trigger efficiency

Abstract

The Large Underground Xenon experiment (LUX) searches for dark matter using a dual-phase xenon detector. LUX uses a custom-developed trigger system for event selection. In this paper, the trigger efficiency, which is defined as the probability that an event of interest is selected for offline analysis, is studied using raw data obtained from both electron recoil (ER) and nuclear recoil (NR) calibrations. The measured efficiency exceeds 98% at a pulse area of 90 detected photons, which is well below the WIMP analysis threshold on the S2 pulse area. The efficiency also exceeds 98% at recoil energies of 0.2 keV and above for ER, and 1.3 keV and above for NR. The measured trigger efficiency varies between 99% and 100% over the fiducial volume of the detector.

Metadata

Authors/Creators:

Akerib, D.S.
Alsum, S.
Araújo, H.M.
Bai, X.
Balajthy, J.
Beltrame, P.
Bernard, E.P.
Bernstein, A.
Biesiadzinski, T.P.
Boulton, E.M.
Boxer, B.
Brás, P.
Burdin, S.
Byram, D.
Carmona-Benitez, M.C.
Chan, C.
Cutter, J.E.
Davison, T.J.R.
Druszkiewicz, E.
Fallon, S.R.
Fan, A.
Fiorucci, S.
Gaitskell, R.J.
Genovesi, J.
Ghag, C.
Gilchriese, M.G.D.
Grace, E.
Gwilliam, C.
Hall, C.R.
Haselschwardt, S.J.
Hertel, S.A.
Hogan, D.P.
Horn, M.
Huang, D.Q.
Ignarra, C.M.
Jacobsen, R.G.
Ji, W.
Kamdin, K.
Kazkaz, K.
Khaitan, D.
Knoche, R.
Korolkova, E.V.
Kravitz, S.
Kudryavtsev, V.A. https://orcid.org/0000-0002-7018-5827
Lenardo, B.G.
Lesko, K.T.
Liao, J.
Lin, J.
Lindote, A.
Lopes, M.I.
Manalaysay, A.
Mannino, R.L.
Marangou, N.
Marzioni, M.F.
McKinsey, D.N.
Mei, D.-M.
Moongweluwan, M.
Morad, J.A.
Murphy, A.S.J.
Nehrkorn, C.
Nelson, H.N.
Neves, F.
Oliver-Mallory, K.C.
Palladino, K.J.
Pease, E.K.
Rischbieter, G.R.C.
Rhyne, C.
Rossiter, P.
Shaw, S.
Shutt, T.A.
Silva, C.
Solmaz, M.
Solovov, V.N.
Sorensen, P.
Sumner, T.J.
Szydagis, M.
Taylor, D.J.
Taylor, W.C.
Tennyson, B.P.
Terman, P.A.
Tiedt, D.R.
To, W.H.
Tripathi, M.
Tvrznikova, L.
Utku, U.
Uvarov, S.
Velan, V.
Verbus, J.R.
Webb, R.C.
White, J.T.
Whitis, T.J.
Witherell, M.S.
Wolfs, F.L.H.
Woodward, D.
Xu, J.
Yazdani, K.
Zhang, C.

© 2018 Elsevier. This is an author produced version of a paper subsequently published in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/).

Keywords:

Trigger efficiency; Dark matter detectors; WIMPs; Liquid xenon

Dates:

Accepted: 30 July 2018
Published (online): 22 August 2018
Published: 11 November 2018

Institution:

The University of Sheffield

Academic Units:

The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield)

Funding Information:

Funder	Grant number
SCIENCE AND TECHNOLOGY FACILITIES COUNCIL	ST/K006444/1
SCIENCE AND TECHNOLOGY FACILITIES COUNCIL	ST/M003469/1
SCIENCE AND TECHNOLOGY FACILITIES COUNCIL	ST/N000277/1
Science and Technology Facilities Council	ST/N000277/1

Depositing User:

Symplectic Sheffield

Date Deposited:

26 Sep 2018 10:53

Last Modified:

22 Aug 2019 00:42

Published Version:

https://doi.org/10.1016/j.nima.2018.07.094

Status:

Published

Publisher:

Elsevier