Author:
Augier C.,Baulieu G.,Belov V.,Berge L.,Billard J.,Bres G.,Bret J-. L.,Broniatowski A.,Calvo M.,Cazes A.,Chaize D.,Chapellier M.,Chaplinsky L.,Chemin G.,Chen R.,Colas J.,De Jesus M.,de Marcillac P.,Dumoulin L.,Exshaw O.,Ferriol S.,Figueroa-Feliciano E.,Filippini J. -B.,Formaggio J. A.,Fuard S.,Gascon J.,Giuliani A.,Goupy J.,Goy C.,Guerin C.,Guy E.,Harrington P.,Heine S. T.,Hertel S. A.,Heusch M.,Hirjibehedin C. F.,Hong Z.,Ianigro J.-C.,Jin Y.,Johnston J. P.,Juillard A.,Karaivanov D.,Kazarcev S.,Lamblin J.,Lattaud H.,Li M.,Lubashevskiy A.,Marnieros S.,Mayer D. W.,Minet J.,Misiak D.,Mocellin J-.L.,Monfardini A.,Mounier F.,Oliver W. D.,Olivieri E.,Oriol C.,Patel P. K.,Perbet E.,Pinckney H. D.,Poda D.,Ponomarev D.,Rarbi F.,Real J.-S.,Redon T.,Robert A.,Rozov S.,Rozova I.,Salagnac T.,Sanglard V.,Schmidt B.,Shevchik Ye.,Sibille V.,Soldner T.,Stachurska J.,Stutz A.,Vagneron L.,Van De Pontseele W.,Vezzu F.,Weber S.,Winslow L.,Yakushev E.,Zinatulina D.,
Abstract
AbstractThe future Ricochet experiment aims at searching for new physics in the electroweak sector by providing a high precision measurement of the Coherent Elastic Neutrino-Nucleus Scattering (CENNS) process down to the sub-100 eV nuclear recoil energy range. The experiment will deploy a kg-scale low-energy-threshold detector array combining Ge and Zn target crystals 8.8 m away from the 58 MW research nuclear reactor core of the Institut Laue Langevin (ILL) in Grenoble, France. Currently, the Ricochet Collaboration is characterizing the backgrounds at its future experimental site in order to optimize the experiment’s shielding design. The most threatening background component, which cannot be actively rejected by particle identification, consists of keV-scale neutron-induced nuclear recoils. These initial fast neutrons are generated by the reactor core and surrounding experiments (reactogenics), and by the cosmic rays producing primary neutrons and muon-induced neutrons in the surrounding materials. In this paper, we present the Ricochet neutron background characterization using $$^3$$
3
He proportional counters which exhibit a high sensitivity to thermal, epithermal and fast neutrons. We compare these measurements to the Ricochet Geant4 simulations to validate our reactogenic and cosmogenic neutron background estimations. Eventually, we present our estimated neutron background for the future Ricochet experiment and the resulting CENNS detection significance. Our results show that depending on the effectiveness of the muon veto, we expect a total nuclear recoil background rate between 44 ± 3 and 9 ± 2 events/day/kg in the CENNS region of interest, i.e. between 50 eV and 1 keV. We therefore found that the Ricochet experiment should reach a statistical significance of 4.6 to 13.6 $$\sigma $$
σ
for the detection of CENNS after one reactor cycle, when only the limiting neutron background is considered.
Funder
Ministry of Science and Higher Education of the Russian Federation
Department of Energy
Heising-Simons Foundation
Agence Nationale de la Recherche
National Science Foundation
H2020 European Research Council
Publisher
Springer Science and Business Media LLC
Subject
Physics and Astronomy (miscellaneous),Engineering (miscellaneous)
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
1. Results from a prototype TES detector for the Ricochet experiment;Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment;2023-12