Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session L17: Neutrinos II |
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Sponsoring Units: DPF Chair: Kate Scholberg, Duke University Room: Sheraton Grand Ballroom II |
Sunday, April 14, 2019 3:30PM - 3:42PM |
L17.00001: DUNE as the next-generation solar neutrino experiment Francesco Capozzi, Shirley Li, Guanying Zhu, John F Beacom Important questions in solar neutrinos need to be answered. How? We propose the solar neutrino program for the next-generation neutrino experiment--DUNE. We first show the advantages of DUNE itself. Then we show that the detection backgrounds can be made low to make this program realistic. From our analysis, DUNE solar program could give the best measurement of mixing parameters and 8B flux, and make the first detection of hep. The spectacular results DUNE would achieve may open substantial discovery space in particle physics and astrophysics. |
Sunday, April 14, 2019 3:42PM - 3:54PM |
L17.00002: Signal Processing in the ProtoDUNE-SP LArTPC Wenqiang Gu ProtoDUNE-SP is the single-phase prototype for the DUNE Far Detector. Consisting of an active volume of 6m high, 7m wide and 7.2m deep (along the drift direction), ProtoDUNE-SP with a total liquid argon mass of 0.77kt represents the world largest monolithic single-phase liquid argon time projection chamber (LArTPC) ever built to date. It was constructed at the CERN Neutrino Platform (NP) and started the operation in late 2018, serving to validate the cryostat technology, the modular TPC design, the cold read-out electronics and the other infrastructures. Given the wire readout technology employed in ProtoDUNE-SP, the combination of the induction and collection wire plane information helps resolve the degeneracies inherent in a projective wire geometry. In this talk, in addition to the detector performance, we present the signal processing techniques through which the ionization signal is precisely recovered in charge and time from the digitized waveforms, which comprise the original ionization signal convolved with the detector field response and electronics response as well as noise. The correct modeling of these ingredients is critical for further event reconstruction. |
Sunday, April 14, 2019 3:54PM - 4:06PM |
L17.00003: The CEvNS Glow of a Supernova Kate Scholberg Coherent elastic neutrino-nucleus scattering (CEvNS) is a neutral-current process in which a neutrino scatters off an entire nucleus, depositing a tiny recoil energy. The process is important in core-collapse supernovae and also presents an opportunity for detection of a burst of core-collapse supernova neutrinos in low-threshold detectors designed for dark matter detection. This talk prospects for supernova burst detection via CEvNS in existing and future large detectors. |
Sunday, April 14, 2019 4:06PM - 4:18PM |
L17.00004: The Photon Detection System (PDS) at ProtoDUNE Bryan J Ramson The Deep Underground Neutrino Experiment (DUNE) is a future accelerator based neutrino experiment hosted at Fermilab with a number of proposed investigations including leptonic CP-violation, neutrino oscillation parameters, the mass hierarchy question, neutrino signals from supernovae (SN) and the existence of proton decay. Last fall, the first in a pair of full scale prototypes of DUNE, the ProtoDUNE Single Phase (ProtoDUNE-SP) experiment, was activated. Over three months of active beam time, it recorded signals from particles of various momenta provided by the CERN SPS accelerator. This talk will focus on one of the sub-detectors, the ProtoDUNE Photon Detection System (PDS), and mostly concern the light captured by the PDS which can provide nanosecond scale timing for the entire detector. The PDS will enhance DUNE's capability to detect potential SN events as well as its ability to search for proton-decay signature. Progress on photon detector calibration and event flash timing will be presented along with a comparison of prototype photon collector technology performance. Progress on current physics analyses involving the PDS will also be included. |
Sunday, April 14, 2019 4:18PM - 4:30PM |
L17.00005: Calorimetric Energy Measurement for Supernova Neutrinos using the DUNE Photon Detection System Biswaranjan Behera, Alexander I Himmel, Robert Wilson The photon detection system (PDS) is a subsystem detector of the Deep Underground Neutrino Experiment (DUNE). It measures the scintillation light signal and allows determination of the time of occurrence of an event of interest with much higher precision than charge collected from ionization in the liquid argon time projection chambers and provides a complementary measurement of the deposited energy. This talk will report on simulation studies of calorimetric energy measurement of neutrinos from supernova neutrino bursts (SNB) in DUNE using the PDS. |
Sunday, April 14, 2019 4:30PM - 4:42PM |
L17.00006: Photon Detection System for DUNE Dual Phase Ana Gallego The Deep Underground Neutrino Experiment (DUNE) is a dual-site experiment for long-baseline neutrino oscillation studies, and for neutrino astrophysics and nucleon decay searches. The Far Detector (FD) of DUNE will consist of four 10-kt LAr TPCs at 1300 km distance from the neutrino beam. The photon detection system (PDS) embedded within the detector adds precise timing capabilities for non-beam events, such as supernova burst neutrinos and proton decay. The ProtoDUNE Dual Phase (DP) detector consists of a 6x6x6 m3 LAr TPC and is crucial to demonstrate the viability of the technology on a massive scale. The PDS is formed by 36 8-inch cryogenic R5912-20Mod photomultiplier tubes (PMTs) from Hamamatsu. An LED-based fiber calibration system has been designed to check the PMT performance. The validation measurements of the PMT model will be reviewed as well as the characterization results of the PMTs used in ProtoDUNE-DP. The validation of the light calibration system will be also presented. In addition, the first simulation studies of the supernova trigger based on the light for DUNE-DP 10-kt FD will be shown. |
Sunday, April 14, 2019 4:42PM - 4:54PM |
L17.00007: Supernova Pointing Resolution of DUNE Alison Jacqueline Roeth One of the primary physics goals of the Deep Underground Neutrino Experiment (DUNE) is measuring the electron neutrino flux from a core-collapse supernova or black hole formation. If a neutrino burst were detected, an essential piece of information would be its location. This would allow other astronomers to observe it and help determine which star collapsed, and thus its distance and history. Because of the importance of locating a neutrino burst's source, the pointing resolution of DUNE for neutrino bursts has been calculated using simulations in this study. The pointing resolution was first calculated for single electrons, then for neutrino-electron elastic scattering events, and finally for the expected supernova signal, looking only at elastic scattering events, since this type of event has the most directional signal. Using daughter tracks to help determine primary track direction was implemented and shown to improve pointing resolution. The model used in this study will be made more realistic by adding noise and the other SN neutrino interaction modes in order to accurately estimate DUNE's real pointing resolution for supernovae. |
Sunday, April 14, 2019 4:54PM - 5:06PM |
L17.00008: Fitting Supernova Spectral Parameters with DUNE Erin Conley for the DUNE Collaboration The Deep Underground Neutrino Experiment (DUNE) is an upcoming experiment dedicated to the study of neutrino oscillation physics, nucleon decay, and core-collapse supernova neutrinos. Set for operation in 2026, DUNE will utilize the world's largest liquid argon time-projection chamber at 40 kt fiducial volume. The DUNE detector will detect approximately 3000 neutrinos from a supernova occurring 10 kpc from Earth. These neutrinos have much lower energies (few to 10s of MeV energy range) than those studied in the rest of DUNE's physics program. In order to optimize the DUNE neutrino detectors for low-energy physics, the collaboration has initiated simulation studies to investigate DUNE’s ability to measure supernova spectral parameters. This talk will present an algorithm developed using the program SuperNova Observatories with General Long Baseline Experiment Simulator (SNOwGLoBES). These studies will provide constraints on different detector parameters that affect the measurements, quantify the uncertainty in the measurements, and help prepare DUNE for future supernovae. |
Sunday, April 14, 2019 5:06PM - 5:18PM |
L17.00009: Decomposition and Extrapolation Techniques for $\nu_e$ Signal and Background Predictions in NO$\nu$A Shiqi Yu NO$\nu$A is a long baseline neutrino oscillation experiment, using two functionally identical detectors to measure $\nu_e$ appearance and $\nu_\mu$ disappearance at the Far Detector (FD) with the NuMI Beam at Fermilab. The Near Detector (ND) measures the $\nu_\mu$ flux, some of |
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