Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session J10: Tonne Scale Neutrinoless Double Beta Decay R&D IV
1:30 PM–3:18 PM,
Sunday, April 14, 2019
Sheraton
Room: Governor's Square 12
Sponsoring
Units:
DNP DPF
Chair: Jason Detwiler, University of Washington
Abstract ID: BAPS.2019.APR.J10.3
Abstract: J10.00003 : Performance Analysis and Operation of the EXO-200 Muon Veto System*
1:54 PM–2:06 PM
Presenter:
Mitchell Hughes
(The University of Alabama)
Author:
Mitchell Hughes
(The University of Alabama)
The EXO-200 experiment implemented a single-phase time projection chamber (TPC) as the combined source and detector for a neutrinoless double-beta decay search in isotopically enriched $^{136}$Xe. Despite being emplaced roughly 655 m underground at the Waste Isolation Pilot Plant near Carlsbad, NM, atmospheric muons still represented a significant background. In order to tag incoming muons and prompt decays, a muon veto system comprising 29 large plastic scintillator panels surrounded the TPC cleanroom on four sides. Throughout the lifetime of EXO-200, the muon veto system was monitored continuously to ensure acceptable performance and deadtime contributions. These measures included semi-annual calibration campaigns using a sealed radioactive source, the fitting of Landau peaks in underground muon spectra, and a battery of studies on ROI background impact, trigger efficiency, and rate for each veto system channel. Methods and conclusions from these studies will be discussed.
*This work has been supported, in the US, by DOE's Office of Nuclear Physics within the Office of Science and the National Science Foundation.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2019.APR.J10.3
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