Reduction of 222Rn-induced backgrounds in a hermetic dual-phase xenon time projection chamber

Abstract

The continuous emanation of 222Rn from detector surfaces causes the dominant background in current liquid xenon time projection chambers (TPCs) searching for dark matter. A significant reduction is required for the next generation of detectors which are aiming to reach the neutrino floor, such as DARWIN. 222Rn-induced backgrounds can be reduced using a hermetic TPC, in which the sensitive target volume is mechanically separated from the rest of the detector containing the majority of Rn-emanating surfaces. We present a hermetic TPC that mainly follows the well-established design of leading xenon TPCs and has been operated successfully over a period of several weeks. By scaling up the results achieved to the DARWIN-scale, we show that the hermetic TPC concept can reduce the 222Rn concentration to the required level, even with imperfect separation of the volumes.

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Item Type:	Article
Authors/Creators:	Dierle, J. Brown, A. https://orcid.org/0000-0002-1623-8086 Fischer, H. Glade-Beucke, R. Grigat, J. Kuger, F. Lindemann, S. Rajado Silva, M. Schumann, M. https://orcid.org/0000-0002-5036-1256
Copyright, Publisher and Additional Information:	© The Author(s) 2023. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Keywords:	Nuclear and Plasma Physics; Particle and High Energy Physics; Physical Sciences
Dates:	Published (online): 9 January 2023 Published: 9 January 2023
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematical and Physical Sciences
Depositing User:	Symplectic Sheffield
Date Deposited:	13 May 2025 15:07
Last Modified:	13 May 2025 15:07
Status:	Published
Publisher:	Springer Science and Business Media LLC
Refereed:	Yes
Identification Number:	10.1140/epjc/s10052-022-11151-w
Related URLs:	Author arXiv URL
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:226602

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Reduction of 222Rn-induced backgrounds in a hermetic dual-phase xenon time projection chamber

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