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Nagoya Workshop on Technology and Instrumentation in Future Liquid Noble Gas Detectors

13–16 Feb 2024 Workshop
KMI Science Symposia
Asia/Tokyo timezone

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Contribution List

47 out of 47 displayed
  1. 1. Seminar: Performance of novel Silicon Photo-Multipliers for the nEXO and Darkside-20k experiments.
    Dr Giacomo Gallina (Princeton)
    13/02/2024, 16:00

    Silicon Photomultipliers (SiPMs) have emerged as a compelling photosensor solution for detecting single photons in applications ranging from particle physics to medical imaging and beyond. SiPMs consist of an array of tightly packaged Single Photon Avalanche Diodes (SPADs) operated above the breakdown voltage so that they generate self sustaining charge avalanches upon absorbing an incident...

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  2. 3. Welcome Speech
    14/02/2024, 09:30
  3. 4. Overview of future LXe-based DM searches
    Prof. Marc Schumann (University of Freiburg)
    14/02/2024, 09:35
  4. 5. Where We Go with Liquid Ar-based Dark Matter Searches?
    Prof. Masayuki Wada (AstroCeNT, CAMK PAN)
    14/02/2024, 10:05

    The quest for detecting Weakly Interacting Massive Particles (WIMPs), considered as prominent candidates for dark matter, has been ongoing for several decades. This presentation will provide an overview of the current progress in major searches conducted using experiments aimed at detecting both high-mass and low-mass (<10 GeV) WIMPs. The discussion will also cover existing technological...

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  5. 6. Development of a crystalline xenon TPC for neutrino-limited dark matter search
    Dr Peter Sorensen (LBL)
    14/02/2024, 11:05
  6. 7. The development of Hermetic Quartz Detector for the DARWIN experiment
    Prof. Masatoshi Kobayashi (KMI, Nagoya University)
    14/02/2024, 11:35
  7. 8. The development of Hermetic TPC for the DARWIN experiment
    Prof. Marc Schumann (University of Freiburg)
    14/02/2024, 12:05
  8. 9. Charge Amplification in Liquid Xenon with a Needle Electrode and Development of a Spherical Detector
    Prof. Hiroyuki Sekiya (ICRR, The University of Tokyo)
    14/02/2024, 14:05
  9. 10. On the feasibility of the single phase liquid xenon proportional scintillation counter for low-energy nuclear recoil based physics searches
    Jianyang Qi (UCSD), Prof. Kaixuan Ni (University of California San Diego)
    14/02/2024, 14:35

    Liquid phase xenon electroluminescence allows us to achieve a perfect extraction efficiency by eliminating the liquid-gas interface, at the cost of having a low single-electron gain. For low-energy searches, we are concerned with the discrimination between electronic and nuclear recoils (ER and NR), as well as the single-electron background. In this talk, we shall show evidence that ER/NR...

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  10. 11. PANCAKE - Freiburgs DARWIN demonstrator and Freiburgs single phase TPC
    Julia Müller
    14/02/2024, 15:05
  11. 12. Micro-structured multiplier concepts for single-phase detectors
    Prof. Amos Breskin
    14/02/2024, 15:35
  12. 13. Design and performance of the XENONnT TPC electric field
    Dr Francesco Toschi (Karlsruhe Institut of Technology/University of Heidelberg)
    14/02/2024, 16:35

    Considering the fundamental role of the electric drift field in the formation and collection of the signals produced in the active volume of a dual-phase time projection chamber (TPC), significant effort was dedicated to the design and simulation of the field cage of the XENONnT TPC. The outcome of this work is an innovative double-array structure connected by an easily accessible voltage...

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  13. 14. Design and performance of the LZ TPC electric field
    Prof. Tom Shutt (SLAC)
    14/02/2024, 17:05
  14. 15. The NEXT-100 electroluminescent grid design
    Dr Krishan Mistry (University of Texas at Arlington)
    14/02/2024, 17:35

    NEXT-100 is a high-pressure gaseous time projection chamber searching for neutrinoless double beta decay with enriched xenon-136. Ionisation electrons are amplified in the detector through the use of electroluminescent (EL) amplification which enables proportional gain with minimal fluctuations enabling sub-percent energy resolution. The experiment is in the final stages of construction...

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  15. 37. LZ search for new physics via low-energy electron recoils
    Anh Van Thi Nguyen (University of Edinburgh)
    14/02/2024, 18:10

    Present the status of the LZ experiment searches for new physics via low-energy electron recoils using first science run data, focusing on two monoenergetic signals: axion-like particles (ALPs) and hidden photons (HP).

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  16. 38. Estimation of 85Kr background in the XENONnT using delayed coincidence count
    Yoshino Kaminaga (ICRR, the University of Tokyo)
    14/02/2024, 18:20

    The Xe-based dark matter search experiment XENONnT searches for rare events such as dark matter recoil and solar pp neutrino signals. It requires accurate estimates of the background. The radioactive isotope 85Kr in Xe is one of the background sources in these searches. To reduce the uncertainty of its abundance, 85Kr abundance estimation using delayed coincidence counting has been introduced....

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  17. 39. Development of Hermetic Liquid Xenon Detector for the DARWIN experiment
    Ryuta Miyata (Nagoya University)
    14/02/2024, 18:30
  18. 40. Development of a hybrid-photodetector for the DARWIN experiment
    Tomoya Hasegawa
    14/02/2024, 18:40
  19. 41. Field Emission Array (FEA) for electron/hole emission into liquid xenon
    Caio Takanori Oba Ishikawa
    14/02/2024, 18:50

    We are investigating the use of field emission arrays (FEAs) made of silicon to purify a liquid xenon detector. It is known that electronegative contaminants can be drifted by attaching electrons to them and using an external field. Our main objective is to see if either electrons or holes can be used to drift Rn in LXe, with the ultimate goal being to use this to remove Rn from LXe. We are...

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  20. 42. Development of ultralow radioactive zeolite for the radon removal from gases
    Dr Hiroshi Ogawa
    14/02/2024, 19:00

    The amount of radioactive impurities contaminated in the detector gases is required to be kept at a very low level for rare event particle physics such as dark matter search experiments. Zeolite is one of the possible candidates for removing radon and impurities from gases. A development of a new ultralow radioactive zeolite as a product of the selection of ultralow radioactive materials is...

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  21. 43. Radon Emanation Measurement and Mitigation
    Dr Raymond Bunker (Pacific Northwest National Laboratory)
    14/02/2024, 19:10

    Radon is a key background consideration in experiments that search for rare events such as dark matter interactions and neutrinoless double-beta decay. For future noble-liquid and -gas detectors, radon emanated into the detection medium will need to be tightly controlled through radon emanation screening of the wetted materials. I will present systems for low-level measurement of radon...

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  22. 44. Dust and Cables: Addressing Major Background Concerns in Rare-Event Ultralow Background Physics Experiments
    Dr Isaac Arnquist (Pacific Northwest National Laboratory)
    14/02/2024, 19:20

    Dust particulate fallout on materials in use for rare-event searches is a concerning source of radioactive backgrounds due to the presence of the naturally occurring radionuclides. Much effort is dedicated to understanding backgrounds from dust and evaluating mitigation procedures. In this work, an ICP-MS based methodology is presented that demonstrates a direct determination of fallout rates...

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  23. 45. Measurements of the anisotropic response of ZnWO4 scintillators to neutrons for Developing the Direction-Sensitive Dark Matter Detector
    Hiroki Kochi (ICRR)
    14/02/2024, 19:30

    We are developing a dark matter direction sensitive detector based on ZnWO_4_ crystals which have anisotropic scintillation response . In this poster, we discuss quantitatively the anisotropy of scintillation of oxygen nuclear recoils for a 670 keV neutron beam produced by T(p,n) reaction at AIST.

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  24. 46. FlameNEST: powerful statistical inference for the LZ and XLZD experiments
    Dr Robert James (The University of Melbourne)
    14/02/2024, 19:40

    FlameNEST is a novel approach to statistical inference for liquid xenon time projection chambers that enables the incorporation of higher-dimensional observable spaces and correlated shape-varying nuisance parameters in a computationally efficient manner. It is currently being used for statistical inference and detector calibration fits enabling dark matter searches with the world-leading...

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  25. 47. The Xenon liquefaction, purification, and storage system XeLiPS
    Dr Francesco Lombardi (J Gutenberg University Mainz)
    14/02/2024, 19:50

    This is an introduction to the new Liquid Xenon R&D facility currently under construction at the Johannes Gutenberg University Mainz (JGU Mainz) in the new Centre for Fundamental Physics (CFP-II). The Xenon liquefaction facility is designed to store, purify, and distribute up to 500kg of liquid xenon to two neighboring laboratories eventually. The liquid xenon can be recuperated by gravity in...

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  26. 19. Spurious Electron and S2-only backgrounds at Darkside-50
    Dr Masato Kimura (AstroCeNT/NCAC PAS)
    15/02/2024, 09:00

    DarkSide-50 is a direct dark matter search experiment using a dual phase argon time projection chamber filled with low-radioactivity underground argon. Based solely on the ionization spectrum, it has set the most stringent exclusion limits for several low-mass dark matter candidates. Such analyses suffer from so-called spurious electron (SE) events at the lowest detectable energy region and...

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  27. 16. S2-only background and Accidental Coincidence backgrounds in XENON1T and XENONnT
    Prof. Fei Gao (Tsinghua University)
    15/02/2024, 09:30
  28. 17. Low-energy ionization background in LUX and LZ
    Dr Jingke Xu (Lawrence Livermore National Laboratory)
    15/02/2024, 10:00

    Liquid xenon TPCs have observed high rates of pathological electrons in the low-energy region, which impair their sensitivities in dark matter searches. They are a direct background to low-mass dark matter interactions that may only produce sub-keV nuclear recoils, and also contribute accidental coincidence backgrounds in large experiments. I will review the studies of low-energy photon and...

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  29. 18. Accidental pileup and single-electron backgrounds in PandaX-4T
    Prof. Qing Lin (University of Science and Technology of China)
    15/02/2024, 10:30

    The PandaX-4T experiment employs a liquid xenon time projection chamber (TPC) to investigate keV-scale nuclear recoils, with the primary objective of directly detecting heavy cold dark matter (10GeV – 10TeV). Additionally, PandaX-4T has expanded its exploration to the sub-keV energy range by reducing the analysis threshold. As a result, it has achieved remarkable sensitivities in searching for...

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  30. 20. SiPMs in the liquid xenon gamma-ray detector for MEG II experiment
    Prof. Toshiyuki Iwamoto (ICEPP, the University of Tokyo)
    15/02/2024, 11:30

    The MEG II experiment searches for new physics like SUSY-GUT/SUSY-seesaw through the lepton flavor violating mu+->e+ gamma with ten times better sensitivity than the MEG expriment( B(mu+ -> e+ gamma) < 4.2x10-13 at 90% CL in 2016). Because the sensitivity of the MEG experiment was already limited by accidental background, the MEG detector was upgraded to realize one order of magnitude better...

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  31. 21. Performance of novel VUV-sensitive Silicon Photo-Multipliers for nEXO
    Dr Giacomo Gallina (Princeton)
    15/02/2024, 12:00

    Liquid xenon time projection chambers are promising detectors to search for neutrinoless double beta decay (0$\nu \beta \beta$), due to their response uniformity, monolithic sensitive volume, scalability to large target masses, and suitability for extremely low background operations. The nEXO collaboration has designed a five-tonne time projection chamber that aims to search for 0$\nu \beta...

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  32. 22. Low dark-count VUV SiPM for the DARWIN experiment
    Prof. Shingo Kazama (Nagoya University)
    15/02/2024, 14:00
  33. 23. Quality Assurance and Quality Control of the 25 m^2 SiPM production for the Darkside-20k dark matter experiment
    Dr Giacomo Gallina (Princeton)
    15/02/2024, 14:30

    Liquid Argon Time Projection Chambers (TPC) are promising detectors for dark matter search due to their response uniformity, scalability to large target masses, and suitability for extremely low background operations. The DarkSide-20k experiment is a new dark matter detector under construction at Istituto Nazionale di Fisica Nucleare (INFN) Laboratori Nazionali del Gran Sasso (LNGS) that...

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  34. 24. Current status of Xenoscope, a full-scale vertical demonstrator for the DARWIN observatory
    Dr Jose Cuenca Garcia (Cuenca Garcia)
    15/02/2024, 15:00
  35. 25. AXEL: High pressure xenon gas TPC
    Prof. Kiseki Nakamura (Tohoku University)
    15/02/2024, 16:00

    AXEL group is developing a high pressure xenon gas detector to search for neutrinoless double beta decay. We will report on our dedicated electron readout system ELCC (electroluminescence collection cell).

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  36. 26. The R&D of the dual phase argon TPC, from DarkSide-50 to DarkSide-20k
    Prof. Yi Wang (IHEP, CAS)
    15/02/2024, 16:30
  37. 27. High voltage in large structures: challenges and progress
    Dr Yanina Biondi (KIT)
    15/02/2024, 17:00
  38. 31. Purification results from the LZ WIMP search
    Prof. Carter Hall (University of Maryland)
    16/02/2024, 10:00
  39. 32. XENONnT Purification
    Prof. Masaki Yamashita (Kavli IPMU, the University of Tokyo)
    16/02/2024, 10:30
  40. 33. PandaX Purification System and Cryogenic Distillation System
    Dr Zhou Wang (Shanghai Jiao Tong University)
    16/02/2024, 11:00
  41. 28. Development of low-background photomultiplier tubes for future liquid xenon detectors
    Dr Ko Abe (Kamioka Observatory, ICRR, The Univ. of Tokyo)
    16/02/2024, 13:00

    Photomultiplier tube (PMT) is one of the best best candidate device as the photo sensor for rare event search experiments, such as dark matter particle interactions and neutrinoless double beta decay events.
    For future experiments, one of the issue that needs to be addressed is its relatively large RI amount due to large amount of material used for the device.
    R13111 is a very low-background...

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  42. 29. PMT readout for PandaX liquid xenon detectors
    Lingyin LUO (Peking University)
    16/02/2024, 13:30
  43. 30. Analog charge readout at nEXO & Cold ASIC electronics submerged in LXe
    Dr Evan Angelico (Stanford University)
    16/02/2024, 14:00

    The nEXO detector, a 5 ton-scale single-phase liquid xenon time projection chamber enriched to 90% in the isotope 136Xe, plans to observe the groundbreaking phenomenon of neutrinoless double beta decay, producing first data in 2030. Its projected sensitivity is robust against backgrounds and “unknown unknowns” due to the use of multiple observables for signal-to-background discrimination, not...

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  44. 34. UAr production for Darkside-20k: Urania, Aria, and DArT Projects.
    Dr Federico Gabriele (INFN - Cagliari Division)
    16/02/2024, 15:00

    The innovative Underground Argon (UAr) Production is part, and a fundamental pillar of the Argon Dark Matter search program, led by the Global Argon Dark Matter Collaboration (GADMC). The aims of the UAr Production is to achieve the procurement of large amounts of low-radioactive UAr, which will be firstly used by the DarkSide-20k experiment. The UAr Production is composed by three projects...

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  45. 35. Radon distillation for future LXe experiments
    Dr Lutz Althüser (University of Münster)
    16/02/2024, 15:30
  46. 36. Mitigation of radon background by surface coating for the next generation of liquid xenon dark matter detectors
    Dr Giovanni Volta (Max-Planck-Institut für Kernphysik)
    16/02/2024, 16:00

    To satisfy the sensitivity requirements for the next generation of liquid xenon dark matter detectors, the radon-induced background must be reduced at least by one order of magnitude with respect to the level reached by the current detector generation (XENONnT 222-Rn activity ~ 1 muBq/kg). The existing technology might not be sufficient to reach this goal; therefore, other strategies must be...

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  47. 2. Registration