CE$\nu$NS Experiment Proposal at CSNS

Abstract

The detection and cross-section measurement of Coherent Elastic Neutrino-Nucleus Scattering (CEνNS) are vital for particle physics, astrophysics, and nuclear physics. Therefore, a new CEνNS detection experiment is proposed in China. Undoped CsI crystals, each coupled with two Photon Multiplier Tubes (PMTs), will be cooled down to 77K and placed at the China Spallation Neutron Source (CSNS) to detect the CEνNS signals produced by neutrinos from stopped pion decays happening within the Tungsten target of CSNS. Owing to the extremely high light yield of pure CsI at 77K, even though it only has a neutrino flux 60\% weaker than the COHERENT experiment, the detectable signal event rate is still expected to be 0.074/day/kg (0.053/day/kg for COHERENT). Low radioactivity materials and devices will be used to construct the detector, and strong shielding will be applied to reduce the radioactive and neutron background. Dual-PMT readout should be able to reject PMT-related background, such as Cherenkov light and PMT dark noise. With all the strategies mentioned above, we hope to reach a 5.1σ signal detection significance within six months of data taking with a 12kg CsI. This presentation will discuss the experiment's design, as well as the estimation of the signal, various kinds of background, and expected signal sensitivity.

References in corpus (12)

• Observation of Coherent Elastic Neutrino-Nucleus Scattering
• Exploring low-energy neutrino physics with the Coherent Neutrino Nucleus Interaction Experiment (CONNIE)
• Exploring CEvNS with NUCLEUS at the Chooz Nuclear Power Plant
• Material radioassay and selection for the XENON1T dark matter experiment
• Background studies for the EDELWEISS dark matter experiment
• Luminescence and scintillation properties of CsI -- a potential cryogenic scintillator
• A D${}_2$O detector for flux normalization of a pion decay-at-rest neutrino source
• Core-Collapse Supernovae, Neutrinos, and Gravitational Waves
• First Observation Of Coherent Elastic Neutrino-Nucleus Scattering
• In-situ gamma-ray background measurements for next generation CDEX experiment in the China Jinping Underground Laboratory
• Prospects of detecting the reactor $\overline{{\nu }_e}$-Ar coherent elastic scattering with a low threshold dual-phase argon time projection chamber at Taishan
• Study on accelerator neutrino detection at a spallation source

Cited by in corpus (2)

• Nuclear neutron radius and weak mixing angle measurements from latest COHERENT CsI and atomic parity violation Cs data
• Characterization and Optimization of a Cryogenic Pure CsI Detector with Remarkable Light Yield and Unprecedented Energy Resolution for CLOVERS Experiment