Simulations of the nEDM@SNS light collection system efficiency

D. A. Loomis; V. Cianciolo; E. Leggett

doi:10.1088/1748-0221/17/04/T04007

Simulations of the nEDM@SNS light collection system efficiency

D. A. Loomis, V. Cianciolo, E. Leggett

Neutron Symmetries

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2 Scopus citations

Abstract

A system for collecting the scintillation light produced by the capture of ultra-cold neutrons (UCN) on polarized 3He is discussed and results from simulations of its performance are presented. This system will be implemented in nEDM@SNS, the experiment searching for the neutron electric dipole moment (nEDM) at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. Simulation results show that the light collection system detects on average 17 photoelectrons per UCN-3He capture event (sufficient to generate a robust signal), reconstructs the event location in the beam direction to approximately 3 cm accuracy, detects capture events with a high and spatially uniform efficiency (0.95 with 1% variation), and rejects greater than 50% of beta decay background events.

Original language	English
Article number	T04007
Journal	Journal of Instrumentation
Volume	17
Issue number	4
DOIs	https://doi.org/10.1088/1748-0221/17/04/T04007
State	Published - Apr 1 2022

Keywords

Photon detectors for UV, visible and IR photons (vacuum) (photomultipliers, HPDs, others)
Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators)
Simulation methods and programs

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10.1088/1748-0221/17/04/T04007

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title = "Simulations of the nEDM@SNS light collection system efficiency",

abstract = "A system for collecting the scintillation light produced by the capture of ultra-cold neutrons (UCN) on polarized 3He is discussed and results from simulations of its performance are presented. This system will be implemented in nEDM@SNS, the experiment searching for the neutron electric dipole moment (nEDM) at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. Simulation results show that the light collection system detects on average 17 photoelectrons per UCN-3He capture event (sufficient to generate a robust signal), reconstructs the event location in the beam direction to approximately 3 cm accuracy, detects capture events with a high and spatially uniform efficiency (0.95 with 1% variation), and rejects greater than 50% of beta decay background events.",

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T1 - Simulations of the nEDM@SNS light collection system efficiency

AU - Loomis, D. A.

AU - Cianciolo, V.

AU - Leggett, E.

PY - 2022/4/1

Y1 - 2022/4/1

N2 - A system for collecting the scintillation light produced by the capture of ultra-cold neutrons (UCN) on polarized 3He is discussed and results from simulations of its performance are presented. This system will be implemented in nEDM@SNS, the experiment searching for the neutron electric dipole moment (nEDM) at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. Simulation results show that the light collection system detects on average 17 photoelectrons per UCN-3He capture event (sufficient to generate a robust signal), reconstructs the event location in the beam direction to approximately 3 cm accuracy, detects capture events with a high and spatially uniform efficiency (0.95 with 1% variation), and rejects greater than 50% of beta decay background events.

AB - A system for collecting the scintillation light produced by the capture of ultra-cold neutrons (UCN) on polarized 3He is discussed and results from simulations of its performance are presented. This system will be implemented in nEDM@SNS, the experiment searching for the neutron electric dipole moment (nEDM) at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. Simulation results show that the light collection system detects on average 17 photoelectrons per UCN-3He capture event (sufficient to generate a robust signal), reconstructs the event location in the beam direction to approximately 3 cm accuracy, detects capture events with a high and spatially uniform efficiency (0.95 with 1% variation), and rejects greater than 50% of beta decay background events.

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Simulations of the nEDM@SNS light collection system efficiency

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