Angel Abusleme, Joao Pedro Athayde Marcondes de Andre, Andrej Babic, Natael Cabrera, Timo Enqvist, Andrea Fabbri, Haonan Gan, Paul Hackspacher, Ara Ioannisian, Beatrice Jelmini, Leonidas Kalousis, Tobias Lachenmaier, Bangzheng Ma, Massimiliano Nastasi, Lothar Oberauer, Juan PedroOchoa-Ricoux, Fazhi Qi, Muhammad Usman Rajput, Andrey Sadovsky, Jian Tang, Nikita Ushakov, Johannes vanden Boom, Pablo Walker, Yufei Xi, Baojun Yan, Noman Zafar, Ints Mednieks . Radioactivity control strategy for the JUNO detector. Journal of High Energy Physics, 2021(11), 102 pp. 2021.

Bibtex citation:
author = {Angel Abusleme and Joao Pedro Athayde Marcondes de Andre and Andrej Babic and Natael Cabrera and Timo Enqvist and Andrea Fabbri and Haonan Gan and Paul Hackspacher and Ara Ioannisian and Beatrice Jelmini and Leonidas Kalousis and Tobias Lachenmaier and Bangzheng Ma and Massimiliano Nastasi and Lothar Oberauer and Juan PedroOchoa-Ricoux and Fazhi Qi and Muhammad Usman Rajput and Andrey Sadovsky and Jian Tang and Nikita Ushakov and Johannes vanden Boom and Pablo Walker and Yufei Xi and Baojun Yan and Noman Zafar and Ints Mednieks },
title = {Radioactivity control strategy for the JUNO detector},
journal = {Journal of High Energy Physics},
volume = {2021},
issue = {11},
pages = {102},
year = {2021}

Abstract: JUNO is a massive liquid scintillator detector with a primary scientific goal of determining the neutrino mass ordering by studying the oscillated anti-neutrino flux coming from two nuclear power plants at 53 km distance. The expected signal anti-neutrino interaction rate is only 60 counts per day (cpd), therefore a careful control of the background sources due to radioactivity is critical. In particular, natural radioactivity present in all materials and in the environment represents a serious issue that could impair the sensitivity of the experiment if appropriate countermeasures were not foreseen. In this paper we discuss the background reduction strategies undertaken by the JUNO collaboration to reduce at minimum the impact of natural radioactivity. We describe our efforts for an optimized experimental design, a careful material screening and accurate detector production handling, and a constant control of the expected results through a meticulous Monte Carlo simulation program. We show that all these actions should allow us to keep the background count rate safely below the target value of 10 Hz (i.e. ∼1 cpd accidental background) in the default fiducial volume, above an energy threshold of 0.7 MeV.


Full text: Radioactivity control strategy for the JUNO detector

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