https://doi.org/10.1140/epjc/s10052-022-11151-w
Regular Article - Experimental Physics
Reduction of 
-induced backgrounds in a hermetic dual-phase xenon time projection chamber
Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, 79104, Freiburg, Germany
j
marc.schumann@physik.uni-freiburg.de
Received:
2
September
2022
Accepted:
21
December
2022
Published online:
9
January
2023
The continuous emanation of 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. -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 concentration to the required level, even with imperfect separation of the volumes.
© The Author(s) 2023
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