Aprile, E., Abe, K., Ahmed Maouloud, S. et al. (161 more authors) (2024) Design and performance of the field cage for the XENONnT experiment. The European Physical Journal C, 84. 138. ISSN 1434-6044
Abstract
The precision in reconstructing events detected in a dual-phase time projection chamber depends on an homogeneous and well understood electric field within the liquid target. In the XENONnT TPC the field homogeneity is achieved through a double-array field cage, consisting of two nested arrays of field shaping rings connected by an easily accessible resistor chain. Rather than being connected to the gate electrode, the topmost field shaping ring is independently biased, adding a degree of freedom to tune the electric field during operation. Two-dimensional finite element simulations were used to optimize the field cage, as well as its operation. Simulation results were compared to <jats:inline-formula><jats:alternatives><jats:tex-math>$${}^{83\textrm{m}}\hbox {Kr }$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msup> <mml:mrow/> <mml:mrow> <mml:mn>83</mml:mn> <mml:mtext>m</mml:mtext> </mml:mrow> </mml:msup> <mml:mtext>Kr</mml:mtext> <mml:mspace/> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>calibration data. This comparison indicates an accumulation of charge on the panels of the TPC which is constant over time, as no evolution of the reconstructed position distribution of events is observed. The simulated electric field was then used to correct the charge signal for the field dependence of the charge yield. This correction resolves the inconsistent measurement of the drift electron lifetime when using different calibrations sources and different field cage tuning voltages.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 The Authors. This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
Dates: |
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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: | 28 Jan 2025 12:12 |
Last Modified: | 28 Jan 2025 12:12 |
Published Version: | https://doi.org/10.1140/epjc/s10052-023-12296-y |
Status: | Published |
Publisher: | Springer Science and Business Media LLC |
Refereed: | Yes |
Identification Number: | 10.1140/epjc/s10052-023-12296-y |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:222428 |