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Andrew Stevens (Universität Freiburg)29/06/2026, 18:00Poster
I have been running a cross calibration campaign involving several sites accross the collaboration to prep the screening facilities and prove that the results are accurate and reliable for use in XLZD. I hope here to present the first results of the study.
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Prof. Peter Fischer (Heidelberg University)29/06/2026, 18:01Poster
Digital SiPM photo detectors offer several benefits over PMTs and SiPMs. They are radio-pure, allow for mechanically simple detector planes (low number of feedthroughs, low power), they deliver position and time of each photon with high granularity and may be cost effective. The challenges to address are the quality of the SPADs (dark counts, PDE) and the demonstration of a readout scheme...
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Dr Pawel Majewski (STFC/Rutherford Appleton Laboratory)29/06/2026, 18:02Poster
We will present the updates on the design of the XLZD cryostat and the material searches.
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Sebastian Lindemann (University of Freiburg)29/06/2026, 18:03Poster
In this talk, I will provide an introduction to the Freiburg PANCAKE LXe platform, highlighting its capabilities for XLZD-related R&D. Then, I will present results from operating a 1.5-meter-diameter, 3-centimeter-deep, dual-phase TPC in this unshielded platform. Measurements of various detector- and LXe-specific quantities demonstrate that operating a large-diameter TPC is feasible in this...
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Robert James (The University of Melbourne)29/06/2026, 18:04Poster
A small collaboration between The University of Melbourne and Subatech has been working to quantify the sensitivity of XLZD to low mass WIMPs in the presence of the Migdal effect. We present preliminary results from this work, showing the exclusion and discovery power of XLZD at different milestones of operation under the 40 t to 60 t "French press" detector filling strategy. These projections...
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Yanina Biondi (Karlruhe Institute for Technology)29/06/2026, 18:05Poster
In this talk, I aim to discuss different designs for HV delivery in XLZD, in view of the target electric field, and various ideas for manufacturing and testing HV components. I plan to cover the ideas for the assembly and disassembly of such components, as well as the potential problems that may be encountered.
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Asher Cunningham Kaboth (University of London (GB))29/06/2026, 18:06Poster
We present an overview of the work being done within the XLZD-UK project for a sustainable future. We outline the framework we are using to establish the environmental footprint of the UK project and our plans to build on this to minimise the environmental impact of the project while delivering its scientific goals.
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Philip Garrad29/06/2026, 18:07Poster
A poster outlining the current computing infrastructure at Boulby Underground Laboratory and the improvements that are planned over the coming years to underpin the expansion of the laboratory.
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Anmol Goyal (STFC, UKRI)29/06/2026, 18:08Poster
A brief overview of the challenges and current solutions on transporting, lifting, handling and maneuvering the cryostat with a focus on Boulby.
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Rebecca Hampp (UZH), Sana Ouahada (UZH)29/06/2026, 18:09Poster
The XLZD (XENON-LZ-DARWIN) collaboration is developing the next-generation observatory for dark matter, neutrino and rare-event physics. The detector will use a dual-phase xenon time projection chamber (TPC) with 60 tonnes of active xenon in a volume of approximately 3 meters in both height and diameter.
Xenoscope, at the University of Zurich, is a vertical demonstrator built to address the...
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Prof. Uwe Gerd Oberlack (Johannes Gutenberg University Mainz)29/06/2026, 18:10Poster
The MainzTPC is a dual-phase xenon time projection chamber (TPC) containing roughly 300 g of liquid xenon (LXe). It is dedicated to the study of scintillation and ionization processes in LXe for low-energy electronic and nuclear recoils. The detector has been designed to be the primary target in Compton and neutron scattering experiments to measure recoil energies in LXe down to 1 keV.
To...
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Alex Jones (STFC-UKRI)29/06/2026, 18:11Poster
An overview of the Rn Reduced spaces currently being proposed for XLZD@Boulby. Covers background information on their different purposes, their potential structural design, and their different configurations.
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Anna Hurhina (Nikhef)29/06/2026, 18:12Poster
Delayed photon signals remain an insufficiently constrained instrumental background in liquid xenon TPCs. One possible origin is nuisance photoluminescence (PL): absorption of 175 nm xenon scintillation photons by detector materials or surface contaminants, followed by delayed re-emission at near-UV and visible wavelengths. Recent studies at Nikhef R&D lab for Xe TPCs suggest that materials...
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Mr Martin McBrinn (STFC-UKRI)29/06/2026, 18:13Poster
An overview of the strategies being implemented at Boulby for underground conveyance both through the mine and labs. Primarily focussed on the types of parts we are expecting in terms of their size and weight along with how we hope to transport them through various cleanliness levels on carts.
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Ricardo Peres (Imperial College London)29/06/2026, 18:14Poster
The LXe skin detector acts as an important veto system for the TPC as well as providing electrical insulation, thermal decoupling, and radiation shielding between the TPC and the ICV. In this poster we report on the ongoing early studies on instrumentation options for the skin detector: PMTs, SiPMs, WLS fibres and an ionisation-based readout.
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Harry Byrne (STFC - RAL)29/06/2026, 18:15Poster
TPC maintenance may be a large driver for the design of several systems within the experiment. As with all engineering endevours, there is an ideal to aim for when pursuing simple and easy maintenance of a given assembly. XLZD poses quite the challenge for easy access to the full TPC for major maintenance, e.g. 40 t to 80 t detector upgrade. This poster will lay out some of the major...
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Tom Sonius (Karlsruhe Institute of Technology)29/06/2026, 18:16Poster
The XLZD observatory will be a next-generation, multi-tonne xenon detector capable of probing dark matter and neutrino physics at unprecedented sensitivity.
Reaching the anticipated sensitivities requires extremely pure xenon, so that rare-event ionisation signals are not degraded by capture in electronegative impurities diffusing in the liquid. Achieving this purity relies on advanced...
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Keyu Ding (Karlsruhe Institute of Technology)29/06/2026, 18:17Poster
Liquid xenon (LXe) is predicted to sustain bulk electric fields approaching 1 MV/cm; however, experiments consistently observe dielectric breakdown at much lower field strengths, comparable to the operating fields ($\mathcal{O}$(10--100) kV) anticipated for the future XLZD detector.
The MOTION detector, an $\sim$70~kg LXe setup at the Karlsruhe Institute of Technology, is used to study...
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Arindam Roy (Imperial College London)29/06/2026, 18:18Poster
Copper–Kapton flex cables remain a promising alternative to coaxial cables for the XLZD photosensor readout. Detailed measurements of a 2-layer prototype, together with ongoing tests of a representative 3-layer "stripline" prototype, indicate that signal transmission over the required cable lengths is feasible with acceptable attenuation for a 100 MS/s DAQ. In particular, tests and simulations...
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Torben Flehmke (Stockholm University)29/06/2026, 18:19Poster
The likelihood ratio test statistic is guaranteed to be optimal only for simple vs. simple hypotheses. For setting limits, however, we usually deal with compound hypotheses, in which case no such guarantee exists. I apply a focused test statistic to the WIMP limits of the XENONnT SR0 dataset, concentrating the statistical power around a WIMP rate of zero. The resulting limits improve on those...
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Alex Jones (STFC-UKRI), Mr Harry Byrne29/06/2026, 18:20Poster
A site agnostic approach to installation of the Time Projection Chamber (TPC) into its final position within the XLZD detector - looking at different potential options for the detector design to simplify assembly staging and enable TPC maintenance access. Many of the options presented will have impacts on detector design requirements but should all hold a solution to the problem of gaining...
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Daniel Wenz29/06/2026, 18:21Poster
One of the biggest challenges for XLZD will be the mitigation of ²²²Rn to a level ten times lower than the solar pp neutrino background. While cryogenic distillation has been proven to be a suitable tool to reduce the radon background in current-generation LXe TPCs, XLZD will require a purification flow approximately 200 times larger. This high flow necessitates the development of new...
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Kevin Thieme (University of Oxford)29/06/2026, 18:22Poster
Within the UK pre-construction project, the Oxford XLZD team is leading the design of the field cage, an integral component of the delicate inner detector. The field cage encapsulates the liquid xenon target, maximises light collection, and creates a homogeneous electric field to enable particle identification and three-dimensional event reconstruction. In light of XLZD's increased size and...
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Margherita Noia (University of Zurich)29/06/2026, 18:23Poster
The next-generation liquid xenon experiment XLZD will probe the WIMP parameter space down to the irreducible neutrino background. It also aims to achieve excellent sensitivity to neutrinoless double beta decay of $^{136}$Xe, as well as to neutrinos from the atmosphere, the Sun, and supernovae. Achieving such sensitivities requires a detailed understanding and mitigation of background...
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Ying-Ting Lin (University of Münster, Institute for Nuclear physics)29/06/2026, 18:24Poster
With the projected background reductions through cryogenic distillation systems and material selection, the XLZD detector aims for an internal radioactive isotope background an order of magnitude lower than the solar $pp$ neutrino-electron scattering rate. Given a target mass of $O(10)\,$tonnes of liquid xenon (LXe), XLZD will have sufficient statistics to measure the solar $pp$ flux with...
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Björn Penning, Nicolas Angelides (University of Zurich)29/06/2026, 18:25Poster
Swiss research groups deliver leading contributions to particle, astroparticle, and gravitational-wave physics at major international facilities such as SURF, LNGS, and Boulby. To facilitate next-generation, large-scale projects, the Bedretto Underground Laboratory for Physics (Bedrettolab) is being developed as a premier low-background R&D facility. Located in Ticino, just two hours from...
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Jon Elmer (STFC)29/06/2026, 18:26Poster
The Boulby Underground Laboratory provides a deep, low-background environment for next-generation rare-event physics experiments, including XLZD. Located at approximately 1100 m depth within a working mine, the site offers intrinsically low gamma and neutron backgrounds and low radon levels. These characteristics make it highly suitable for ultra-sensitive dark matter and neutrino detection...
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Bram Miles (University College London)29/06/2026, 18:27Poster
XLZD will operate at an unprecedented scale. New sensitivity requirements combined with the scale-up in detector mass demand significantly stricter radiopurity requirements and far more rigorous tracking and analysis of background contributions from detector construction materials. Existing tools from predecessor experiments require significant updating to manage the logistical demands of...
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Filippo Campanini, Marco Selvi (INFN Bologna), Pietro Di Gangi29/06/2026, 18:28Poster
In the framework of the XLZD collaboration, we present preliminary Monte Carlo simulation studies focused on the design and optimization of the Outer Detector (OD) system. This work evaluates a baseline, XENON-like Neutron Veto configuration based on gadolinium-doped water without an integrated metallic inner vessel.
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We investigate the Light Collection Efficiency (LCE) of the system by...
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