Operating a large-diameter dual-phase liquid xenon TPC in the unshielded PANCAKE facility
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866908781756022784 |
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| author | Müller, Julia Grigat, Jaron Glade-Beucke, Robin Lindemann, Sebastian Luce, Tiffany Madduri, Gnanesh Chandra Reininghaus, Jens Schumann, Marc Softley-Brown, Adam Stevens, Andrew |
| author_facet | Müller, Julia Grigat, Jaron Glade-Beucke, Robin Lindemann, Sebastian Luce, Tiffany Madduri, Gnanesh Chandra Reininghaus, Jens Schumann, Marc Softley-Brown, Adam Stevens, Andrew |
| contents | Future liquid-xenon (LXe) based observatories for rare processes, such as XLZD, require testing of large components and sub-assemblies in cryogenic liquid or gaseous xenon environments. Here we present results from the stable operation of a shallow dual-phase LXe TPC with an inner diameter of 133.4\,cm and a height of 3.1\,cm in the unshielded PANCAKE platform, without underground suppression of cosmic-ray backgrounds. A total of 340\,kg of xenon was used in the experiment, of which 127\,kg constituted the active TPC mass. Measurements of the LXe purity-dependent electron lifetime and the electron drift velocity in LXe demonstrate that sensitive measurements to characterize the TPC performance are possible in a high-background environment, even with a very basic PMT-based light detection system. Improving this will straightforwardly reduce the TPC threshold, which was observed to be around 15\,keV for electronic recoils in TPC operation. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2601_15938 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Operating a large-diameter dual-phase liquid xenon TPC in the unshielded PANCAKE facility Müller, Julia Grigat, Jaron Glade-Beucke, Robin Lindemann, Sebastian Luce, Tiffany Madduri, Gnanesh Chandra Reininghaus, Jens Schumann, Marc Softley-Brown, Adam Stevens, Andrew Instrumentation and Detectors Future liquid-xenon (LXe) based observatories for rare processes, such as XLZD, require testing of large components and sub-assemblies in cryogenic liquid or gaseous xenon environments. Here we present results from the stable operation of a shallow dual-phase LXe TPC with an inner diameter of 133.4\,cm and a height of 3.1\,cm in the unshielded PANCAKE platform, without underground suppression of cosmic-ray backgrounds. A total of 340\,kg of xenon was used in the experiment, of which 127\,kg constituted the active TPC mass. Measurements of the LXe purity-dependent electron lifetime and the electron drift velocity in LXe demonstrate that sensitive measurements to characterize the TPC performance are possible in a high-background environment, even with a very basic PMT-based light detection system. Improving this will straightforwardly reduce the TPC threshold, which was observed to be around 15\,keV for electronic recoils in TPC operation. |
| title | Operating a large-diameter dual-phase liquid xenon TPC in the unshielded PANCAKE facility |
| topic | Instrumentation and Detectors |
| url | https://arxiv.org/abs/2601.15938 |