Measurement of COHERENT Elastic Neutrino Nucleus Scattering with Germanium at the SNS*

The COHERENT Collaboration, which has previously made the world’s

first measurements of Coherent Elastic Neutrino Nucleus Scattering (CEνNS)

on CsI and Liquid Ar targets, is progressing in its multi-target approach with

the deployment of arrays of High-Purity Germanium (HPGe) and Sodium Io-

dide Detectors. P-Type Point Contact (PPC) Ge detectors offer the low noise

and excellent energy resolution required to make precision measurements of the

(CEνNS) recoil spectrum, and Germanium offers an intermediate nuclear mass

necessary for mapping out the predicted N 2 proportionality of the CEνNS cross

section when combined with CsI and Ar measurements. This talk will discuss

the COHERENT Collaborations progress towards the deployment of an 18 kg

array of low-noise, low-threshold, and low-background HPGe detectors at Oak

Ridge National Laboratory’s Spallation Neutron Source (SNS), including the

design of the detector array, detector characterization, and deployment status

at the SNS.