Bulletin of the American Physical Society
APS April Meeting 2023
Volume 68, Number 6
Minneapolis, Minnesota (Apr 15-18)
Virtual (Apr 24-26); Time Zone: Central Time
Session N12: Instrumentation III |
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Sponsoring Units: DPF Chair: Heidi Schellman, Oregon State University Room: Marquette III - 2nd Floor |
Monday, April 17, 2023 1:30PM - 1:42PM |
N12.00001: Construction and Commissioning of the DUNE ND-LAr 2x2 Modules Anja Gauch The Deep Underground Neutrino Experiment (DUNE) is a long-baseline neutrino oscillation experiment with a 70kt liquid argon time projection chamber (LAr TPC) at the Far Detector complex at the Sanford Underground Research Facility (SURF) and a Near Detector (ND) complex planned for the Fermi National Accelerator Laboratory. The ND complex plans for three detector subsystems, including a 150t modular LAr TPC comprised of 35 optically segregated modules. A prototype detector of four modular detectors, DUNE ND-LAr 2x2, will operate in 2023 in Fermilab's NuMI beam. After the construction of the modules was completed, they were successfully operated and commissioned in liquid argon using cosmic-ray muons at the University of Bern. The talk will discuss the overall design of the ND-LAr modules, the construction of these modules, and the performance results obtained from the cosmic-ray data-taking samples. |
Monday, April 17, 2023 1:42PM - 1:54PM |
N12.00002: Q-Pix: a scalable readout system for kiloton-scale neutrino detectors James Battat, Nora Hoch The Q-Pix readout system can provide 3D tracking readout for large-scale rare-event particle physics experiments, with the aim of opening up new windows of exploration into the properties of fundamental particles and their interactions. Q-Pix implements a per-pixel self-triggering cycle of charge integration with reset -- the output of an integrator is coupled to a comparator that triggers a reset of the integrator after a specified amount of accumulated charge. The time between resets encodes information about the signal current, thereby providing access to the physics signal of interest. By sitting idle until an event occurs, the system generates minimal data and consumes little power. Because of its scalability to the multi-kiloton regime, Q-Pix is a candidate readout for future DUNE far detector modules. In this talk, we describe the Q-Pix detection scheme, explain the enhanced physics sensitivity it provides, and present results from a lab-scale detector read out by a prototype Q-Pix system constructed from commercial off-the-shelf components. We also discuss the implementation of Q-Pix in a custom ASIC, and share initial measurements from the first batch of these ASIC chips at cryogenic temperatures. |
Monday, April 17, 2023 1:54PM - 2:06PM |
N12.00003: PoF and SoF for the DUNE VD PDS Wei Shi The Deep Underground Neutrino Experiment (DUNE) is a next-generation long-baseline neutrino oscillation experiment in the US. It consists of four far detector modules, each of which will hold 17 kilotons of liquid argon. These modules sit 1500 meters underground and 1300 kilometers from the near detector complex. The near detector complex will be located at Fermilab about 60 meters underground and 600 meters downstream of the proton beam target. |
Monday, April 17, 2023 2:06PM - 2:18PM |
N12.00004: Testing of Cold Electronics for ProtoDUNE-SP TPCs Alejandro J Yankelevich The ProtoDUNE single-phase and dual-phase detectors in the neutrino platform at CERN serve as prototypes for the horizontal drift and vertical drift modules respectively of the future DUNE experiment. Each detector has dedicated beamlines through which they receive a variety of 0.3-0.7 GeV secondary particles originating from the CERN Super Proton Synchrotron. Following a successful first run in 2018, the DUNE collaboration is currently preparing for a second run with increased beam statistics and improvements to all detector elements. An overview of the cold readout electronics for the DUNE and ProtoDUNE time projection chambers will be presented followed by a description of the procedure for QC testing of the custom waveform digitizer that was designed for DUNE and the results of tests done in preparation for the upcoming ProtoDUNE running. |
Monday, April 17, 2023 2:18PM - 2:30PM |
N12.00005: Delayed Signals in Liquid Xenon Particle Detectors Abigail M Kopec Dual-phase xenon time projection chambers are a leading technology sensitive to a wide range of dark matter particle masses. At interaction energies relevant to searches for axion-like particles and light weakly interacting particles, these detectors (including XENON1T and LUX) have identified delayed signals correlated with high-energy interactions. Elevated rates of electrons and photons decay with power laws that dominate detector activity up to a second after the initial interaction. In this talk, I will summarize the phenomenology of these backgrounds, and present new results on delayed signals in a radial single-phase liquid xenon proportional scintillation counter. |
Monday, April 17, 2023 2:30PM - 2:42PM |
N12.00006: Measuring Optical Properties in Liquid Xenon with LIXO2 wei wang Liquid xenon (LXe) is widely used in various neutrino and dark matter experiments, including the next-generation searches for dark matter and neutrinoless double beta decay, DARWIN and nEXO. LXe scintillates in vacuum ultraviolet (VUV) region, and understanding reflectance and transmittance of materials and photodetection efficiency (PDE) of photosensors in this region is important for optimizing energy resolution and sensitivity of these experiments. LIXO is a setup dedicated to such measurements that was constructed at the University of Alabama. It has already provided the first measurement of angular-resolved reflectivity and PDE of a SiPM in LXe. Recently, LIXO has been upgraded to improve measurement speed, reduce uncertainties, and allow transparency measurements in LXe. This talk will report on the design and characterization of the upgraded system, LIXO2, and will present first results on reflectivity measurements of materials relevant for the next-generation rare event searches in liquid xenon. |
Monday, April 17, 2023 2:42PM - 2:54PM |
N12.00007: Optical simulation of LIXO2 using GPUs Audrey C Best Next-generation searches for neutrinoless double-beta decay and dark matter, such as DARWIN and nEXO, will rely on detection of vacuum ultraviolet light in liquid xenon to reconstruct energy of events. Accurate knowledge of the optical properties of photodetectors and materials is essential for optimization of these experiments. LIXO2 is an upgraded setup built at the University of Alabama to characterize the reflective properties of materials and photodetection efficiency of silicon photomultipliers (SiPMs) to be used by the next-generation liquid xenon experiments. Optical simulations of LIXO2 is critical to understand the systematic effects and improve accuracy of the measurements. This talk will describe the LIXO2 optical simulation based on the Chroma framework. Chroma uses GPUs for ultra-fast photon tracking and directly uses CAD files to describe experimental geometry. Studies conducted using this framework will be described. |
Monday, April 17, 2023 2:54PM - 3:06PM |
N12.00008: R&D for the charge readout of the nEXO experiment Marie Vidal The nEXO experiment searches for neutrinoless double beta decay using a 5-tonne scale LXe time projection chamber enriched to 90% in Xe136, reaching a half-life sensitivity greater than 1028 years. We outline several efforts pursued by the Stanford group; amongst other, the testing of a cryogenic application specific integrated circuit (ASIC) for the charge readout, a solution chosen to meet the stringent noise and radioactivity requirements, and to reduce the system complexity improving measurement fidelity with respect to room temperature solutions. Prototypes of the nEXO charge-readout module readout with an ASIC readout system, developed by SLAC, are being tested in a LXe TPC. Additionally, a larger TPC is under construction able to accommodate a 4 tile charge readout module, investigate cross-talk between the tiles and its impact on the energy resolution |
Monday, April 17, 2023 3:06PM - 3:18PM |
N12.00009: Progress on a novel high-voltage feedthrough concept for DarkSide-20k Tyler J Erjavec, Emilija Pantic, Hanguo Wang, Yi Wang As noble liquid time projection chambers get larger, so does the high voltage (HV) requirements required to maintain strong electric drift fields. HV feedthrough (FT) designs become increasingly complex given limitations imposed by cryogenic temperatures, HV, and cryostat geometry. In this talk, progress on a novel HV FT using a co-extruded multi-layered coaxial cable is presented for DarkSide-20k, emphasizing design considerations implemented to the unique, fully-plastic cable construction. |
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