COHERENT Plans for D$_2$O at the Spallation Neutron Source

Rebecca Rapp

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arXiv · 1910.00630

COHERENT Plans for D$_2$O at the Spallation Neutron Source

Rebecca Rapp

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Abstract

The Spallation Neutron Source (SNS) is a pulsed source of neutrons and, as a byproduct of this operation, an intense source of neutrinos via stopped-pion decay. The COHERENT collaboration uses this source to investigate coherent elastic neutrino-nucleus scattering (CEvNS) with a suite of detectors. To enable precise cross-section measurements, we must address an estimated 10\% uncertainty in our flux calculation associated with the lack of data for $\pi^\pm$ production from 1 GeV protons on an Hg target. We present here our Geant4 simulation of neutrino production at the SNS and our plans to experimentally normalize this flux with the development of a 670 kg D$_2$O detector. Using the precise cross section calculations for neutrino interactions on deuterium, we will dramatically reduce our flux uncertainty.

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Rebecca Rapp. 2019-10-01. COHERENT Plans for D$_2$O at the Spallation Neutron Source. https://arxiv.org/abs/1910.00630

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