Bulletin of the American Physical Society
APS April Meeting 2020
Volume 65, Number 2
Saturday–Tuesday, April 18–21, 2020; Washington D.C.
Session G20: Neutrinos III – Neutrino PropertiesLive
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Sponsoring Units: DNP Chair: Kate Scholberg, Duke University Room: Washington 5 |
Sunday, April 19, 2020 8:30AM - 8:42AM Live |
G20.00001: Generative Adversarial Networks for scintillation light simulation in EXO-200 Shaolei Li The Enriched Xenon Observatory (EXO-200) was an experiment in particle physics aiming to detect neutrinoless double beta decay using about 130 kg of xenon (Xe) enriched in the isotope 136. In the experiment, avalanche photodiodes (APDs) are used to convert Xe scintillation light into electrical signals. Simulations of light signals of APDs in the detector are computationally time-consuming and cannot accurately reflect the experimental data due to unknown material optical properties and geometry. A new approach to fast simulations are generative models, which use deep neural networks to generate detector events that resemble real data. We use EXO-200 experiment data for adversarial training of a generator network and a critic network guided by the Wasserstein distance. The generator is constrained during the training such that the generated APD waveforms show the expected dependency on the initial energy and the deposition positions. Preliminary results of the study will be discussed in the talk. [Preview Abstract] |
Sunday, April 19, 2020 8:42AM - 8:54AM On Demand |
G20.00002: Active Structural Materials for Low Background Experiments Brennan Hackett, Michael Febbraro, Yuri Efremenko Progress in the field of low background physics, including searches for neutrinoless double beta decay ($0\nu\beta\beta$) and for dark matter, places extreme demands for ultra-radio pure technologies. Improving the background sensitivity can be achieved by replacing inactive structural components with transparent, radio-pure plastic scintillators. The structural scintillating components surround the detector with a low background material and serve as an active veto, discriminating internal events of interest from external background events. Poly(ethylene-2,6-naphthalate) (PEN) has been identified as an ideal material for structural scintillator components as it has a significant yield strength and scintillates in the 400 nm region. A synthesis method has been developed to optimize optical properties and limit exposure to radio-impurities. This presentation will provide an update on the synthesis and characterization of PEN and PEN derivatives, as well as proposed application of this material for future ton-scale 0$\nu\beta\beta$ experiments. [Preview Abstract] |
Sunday, April 19, 2020 8:54AM - 9:06AM Live |
G20.00003: Light detection results in ProtoDUNE Dual-Phase Jose Soto-Oton ProtoDUNE Dual-Phase is a 300 ton liquid argon Time Projection Chamber (LArTPC) of 6x6x6 m$^{3}$ fiducial volume placed at CERN. This detector is a prototype for the Dual-Phase module of the Far Detector of DUNE (Deep Underground Neutrino Experiment). DUNE will be a dual-site experiment for long-baseline neutrino oscillation studies, neutrino astrophysics and nucleon decay searches. The far detector will be placed in Sanford Underground Research Facility (USA), containing 40 kton of the fiducial mass of LAr with a fiducial volume of 12x12x60m$^{3}$. The Photon Detection System (PDS) of ProtoDUNE-DP consists of 36 PMTs covered with a wavelength shifting material (either TPB or PEN), and a LED-based calibration system. The operation of the detector started in July 2019, and it will contribute to the validation of the Dual-Phase technology and will provide valuable information for the design of the Photon Detection System of DUNE. The talk will cover the performance of the ProtoDUNE Dual-Phase Photon Detection System and the first results from the light data. [Preview Abstract] |
Sunday, April 19, 2020 9:06AM - 9:18AM Live |
G20.00004: The SBND X-ARAPUCA Light Collection System Daniel Mishins Photon detection significantly improves the calorimetric capabilities and spatial and timing resolution of Liquid Argon Time Projection Chamber (LArTPC) based neutrino detectors. We discuss the X-ARAPUCA light collection system in SBND, which uses wavelength-shifter and dichroic filters to trap photons for collection in SiPMs. We also describe the DAPHNE readout system for SiPM signals, which is used to digitize the signals from the X-ARAPUCAs and is centered around a low-cost commercial ultrasound ADC. [Preview Abstract] |
Sunday, April 19, 2020 9:18AM - 9:30AM Live |
G20.00005: Acoustic and Seismic Noise Subtraction in CUORE Kenneth Vetter The Cryogenic Underground Observatory for Rare Events (CUORE) experiment is an ongoing search for neutrinoless double beta decay ($0\nu\beta\beta$) located at the Gran Sasso National Laboratory (LNGS) in Italy. The experiment features 988 bolometers, each composed of a neutron transmutation doped thermistor attached to a TeO$_2$ crystal. Recent work has found that the CUORE bolometer channels are sensitive to acoustic and seismic events originating from outside the detector at LNGS. The effects are thought to be nonlinear, with a substantial amount of down-mixing occurring during the conversion of vibrational energy to heat. Acoustic events are expected to worsen the energy resolution of the CUORE detector, thus characterizing these nonlinear effects is a necessary step to take. Here we explain our procedure for measuring the effects of acoustic and vibrational noise on the CUORE bolometer channels using microphones and accelerometer. We then discuss the correlation of these devices with the bolometer channels. Finally, we examine how decorrelating this noise may affect the energy resolution of the CUORE detector. [Preview Abstract] |
Sunday, April 19, 2020 9:30AM - 9:42AM Live |
G20.00006: Towards a Precision CEvNS Measurement with a Tonne-Scale Liquid Argon Detector Matthew Heath Precision measurements of coherent elastic neutrino-nucleus scattering (CEvNS) will allow a broad collection of physics studies ranging from improving constraints on non-standard neutrino interactions to probing nuclear structure. A CEvNS detector near a spallation target also provides the opportunity to search for light accelerator-produced dark matter. Such studies require large-scale low-threshold detectors. To that end, the COHERENT collaboration has designed a 750~kg liquid argon (LAr) scintillation detector to deploy at the Spallation Neutron Source at Oak Ridge National Laboratory. The detector is designed to achieve the 20~keVnr threshold needed for efficient detection of nuclear recoils. In this talk I will present the experimental design and discuss the expected physics sensitivity of this detector, as well as outline the ongoing R\&D to further improve the light collection for future CEvNS studies with LAr. [Preview Abstract] |
Sunday, April 19, 2020 9:42AM - 9:54AM Live |
G20.00007: Detection of CEvNS on Argon in the CENNS-10 Liquid Argon Detector Jacob Daughhetee In 2017, the COHERENT collaboration made the first observation of coherent elastic neutrino-nucleus scattering (CEvNS) using a 14.6 kg CsI scintillating crystal detector located at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. COHERENT employs a suite of detectors at the SNS to search for CEvNS in different target nuclei and to measure potential backgrounds. This multi-target program allows for testing of Standard Model predictions for CEvNS as well as for verifying the $N^2$-dependence of the cross section of this interaction. CENNS-10, a 24 kg liquid argon scintillation detector, has been actively taking data at the SNS since the spring of 2017. This talk will detail the methods and results of a search for and detection of CEvNS in CENNS-10 data. [Preview Abstract] |
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