CONUS+ Experiment

N. Ackermann; S. Armbruster; H. Bonet; C. Buck; K. Fülber; J. Hakenmüller; J. Hempfling; G. Heusser; M. Lindner; W. Maneschg; K. Ni; M. Rank; T. Rink; E. Sánchez García; I. Stalder; H. Strecker; R. Wink; J. Woenckhaus

doi:10.1140/epjc/s10052-024-13551-6

2023 Impact factor 4.2

Particles and Fields

Open Access

This article has an erratum: [https://doi.org/10.1140/epjc/s10052-024-13705-6]

Eur. Phys. J. C (2024) 84: 1265
https://doi.org/10.1140/epjc/s10052-024-13551-6

Regular Article

CONUS`+` Experiment

N. Ackermann¹, S. Armbruster¹, H. Bonet¹, C. Buck¹, K. Fülber², J. Hakenmüller¹^,4^,4, J. Hempfling¹, G. Heusser¹, M. Lindner¹, W. Maneschg¹, K. Ni¹, M. Rank³, T. Rink¹, E. Sánchez García¹, I. Stalder³, H. Strecker¹, R. Wink², J. Woenckhaus³^,5 and CONUS Collaboration¹

¹ Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117, Heidelberg, Germany
² PreussenElektra GmbH, Kernkraftwerk Brokdorf, Osterende, 25576, Brokdorf, Germany
³ Kernkraftwerk Leibstadt AG, 5325, Leibstadt, Switzerland
⁴ Duke University, 27708, Durham, NC, USA
⁵ Paul Scherrer Institut, Forschungsstrasse 111, 5232, Villigen, Switzerland

Received: 25 July 2024
Accepted: 27 October 2024
Published online: 6 December 2024

Abstract

The CONUS+ experiment aims to detect coherent elastic neutrino-nucleus scattering (CE $ν$ $\nu$ NS) of reactor antineutrinos on germanium nuclei in the fully coherent regime, continuing on this way the CONUS physics program started at the Brokdorf nuclear power plant, Germany. The CONUS+ setup is installed in the nuclear power plant in Leibstadt, Switzerland, at a distance of 20.7 m from the 3.6 GW thermal power reactor core. The CE $ν$ $\nu$ NS signature will be measured with the same four point-contact high-purity germanium (HPGe) detectors produced for the former experiment, however refurbished and with optimized low energy thresholds of about 160 ${eV}_{ee}$ $\hbox {eV}_{ee}$ . To suppress the background in the CONUS+ detectors, the passive and active layers of the original CONUS shield were modified such to fit better to the significantly changed background conditions at the new experimental location. New data acquisition and monitoring systems were developed. A direct network connection between the experiment and the Max-Planck-Institut für Kernphysik (MPIK) makes it possible to control and monitor data acquisition in real time. The impact of all these modifications is discussed with particular emphasis on the resulting CE $ν$ $\nu$ NS signal prediction for the first data collection phase of CONUS+. Prospects of the planned upgrade in a second phase integrating new larger HPGe detectors are also discussed.

The original HTML-version of this article was revised. In this article the affiliation details for the authors K. Fülber, J. Hakenmüller, K. Ni , M. Rank, E. Sánchez García, I. Stalder, H. Strecker, R. Wink and J. Woenckhaus were incorrectly given.

An erratum to this article is available online at https://doi.org/10.1140/epjc/s10052-024-13705-6.

Present address: Duke University, Durham, NC, 27708, USA

https://doi.org/10.1140/epjc/s10052-024-13705-6

© The Author(s) 2024

corrected publication 2024

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