Bulletin of the American Physical Society
APS April Meeting 2020
Volume 65, Number 2
Saturday–Tuesday, April 18–21, 2020; Washington D.C.
Session R20: Neutrinos VI - Accelerator NeutrinosFocus Live
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Sponsoring Units: DNP Chair: Ralph Massarczyk, Los Alamos National Laboratory Room: Washington 5 |
Monday, April 20, 2020 1:30PM - 1:42PM Live |
R20.00001: Searching for Sterile Neutrinos and accelerator produced Dark Matter with the CCM detector at LANSCE Trevor Edwards Coherent CAPTAIN-Mills (CCM) is an experiment operating in the Lujan Center at Los Alamos Neutron Science Center (LANSCE) that is investigating multiple of the P5 Particle Physics Drivers. Using a 10-ton liquid argon scintillation detector and a stopped pion source generated by a 100 kW, 800 MeV proton beam onto a tungsten target, at 20 Hz, and a pulse width of 290 ns CCM is searching for sterile neutrinos and accelerator produced dark matter. MiniBooNE and LSND have shown compelling evidence for sterile neutrinos in short baseline neutrino oscillation experiments at a combined level of approximately 6 sigma, which warrants an investigation into their observed electron neutrino excess and muon neutrino disappearance. For this investigation the narrow pulse is crucial for isolating the monoenergetic muon neutrinos and rejecting beam related neutrons. Additionally, a narrow pulse increases sensitivity to accelerator produced sub-GeV dark matter, which are predicted by vector portal dark sector models, to thresholds that probe early universe relic density limits. In this talk I will describe the CCM detector and the Lujan Center and show first results from our 2019 beam run. [Preview Abstract] |
Monday, April 20, 2020 1:42PM - 1:54PM Live |
R20.00002: MeV-Scale Physics in MicroBooNE Avinay Bhat MicroBooNE is a near surface Liquid Argon Time Projection Chamber (LArTPC) neutrino experiment along the Booster Neutrino Beam (BNB) at Fermilab. Low electronics noise levels and millimeter spatial resolution allow this detector to be sensitive to MeV-scale interactions. The near surface location of the detector makes it challenging to distinguish interesting low energy activity such as nuclear de-excitation photons and neutron scatters caused by neutrino interactions from cosmic ray backgrounds. This talk will present a novel reconstruction method for these MeV scale energy signatures in MicroBooNE, and its application to a measurement of the cosmic ray background and an effective rejection strategy. Finally, we will present preliminary measurements of MeV energy signatures produced in BNB neutrino interactions, and discuss the application of this technique to studies of low energy neutrino interactions from core-collapse supernovae and Muon Decay at Rest ($\mu$DAR). [Preview Abstract] |
Monday, April 20, 2020 1:54PM - 2:06PM Live |
R20.00003: Commissioning the ICARUS Cosmic Ray Tagger North Wall Tyler Boone, Robert Wilson The ICARUS Cosmic Ray Tagger is an important subsystem to the ICARUS detector in the Short Baseline Neutrino program at Fermilab. A portion of the tagger was installed early to allow for testing of the configuration. In this talk, we discuss the efforts undertaken to make the installation a success, as well as lessons learned that can inform further installation activities as well as provide valuable information about how the full system will need to operate once the experiment is fully underway. [Preview Abstract] |
Monday, April 20, 2020 2:06PM - 2:18PM Live |
R20.00004: Cosmogenic Background Suppression at the Short-Baseline Far Detector (ICARUS) with the Cosmic Ray Tagging System Christopher Hilgenberg The ICARUS liquid argon time-projection chamber will operate at shallow depth and therefore be exposed to the full surface flux of cosmic rays. This poses a problematic background to the electron neutrino appearance analysis. A direct way to suppress this background is to surround the cryostat with a detector capable of tagging incident cosmic muons with high efficiency (95\%). This cosmic ray tagger (CRT), currently in the commissioning phase, is achieved through adopting a system based on extruded organic scintillator, wavelength-shifting fibers, and silicon photomultipliers. A full detector simulation of the CRT system has been implemented, and a large cosmogenic sample, generated via CORSIKA, has been produced. In this talk, I will present progress toward the development of reconstruction tools for cosmogenic background suppression in ICARUS and their application to first data from the partially commissioned CRT system. [Preview Abstract] |
Monday, April 20, 2020 2:18PM - 2:30PM Live |
R20.00005: dQ/dx Calibration of the ICARUS detector using Through-going Muons Biswaranjan Behera Through going muons are muon tracks which travel a substantial distance in the detector volume and then exit. They typically are cosmic muons hitting the detector, as ICARUS is on surface, or muons produced by neutrino interactions in the rock surrounding the ICARUS modules. Through-going muons have an approximately uniform energy deposition in liquid argon, and therefore provide a very useful calibration tool. Due to various detector effects, dQ/dx (the charge collected or induced on the wires per unit track length) is not always exactly proportional to the energy ionization density dE/dx. This talk will report on the current progress towards calibration and correction of these detector effects by using through-going muons, with the goal of accurately measuring dE/dx. [Preview Abstract] |
Monday, April 20, 2020 2:30PM - 2:42PM |
R20.00006: The JSNS2 Neutrino Experiment Miguel Botran The J-PARC Sterile Neutrino Search at the J-PARC Spallation Neutron Source (JSNS2) experiment will search for evidence of neutrino oscillations with $\Delta m^2$ near 1 eV$^2$ using a Gd-doped liquid scintillator detector. The experiment will be conducted in Japan at the J-PARC Materials and Life Science Experimental Facility (MLF). The experiment will use inverse beta decay to search for oscillations of $\bar{\nu}_\mu$ into $\bar{\nu}_e$ over a 24 m baseline using muon decay at rest neutrinos originating from 3 GeV proton interactions with a mercury target. The ultimate purpose of JSNS2 is to test the LSND anomaly. In addition, JSNS2 will perform neutrino cross-section measurements relevant for our understanding of supernova explosions and nuclear physics. In early 2020, the commissioning phase of the experiment will begin collecting data with a 17-ton fiducial volume detector. [Preview Abstract] |
Monday, April 20, 2020 2:42PM - 2:54PM |
R20.00007: Neutrino Trigger Study at the Short-Baseline Far Detector (ICARUS) with the Photomultiplier System Ryan Howell ICARUS, a liquid argon time projection chamber (LArTPC), will employ an array of 180 photomultiplier tubes (PMTs) to detect scintillation light in the detector. The Hamamatsu R5912-MOD brand PMTs will detect this scintillation light, which is the first indication that a neutrino event has occurred. The trigger system will then identify whether the event is a neutrino event of interest and tells the rest of the detector system to start saving data. A fully simulated trigger system was used for this study, as well as neutrino samples generated by GENIE and cosmic samples generated by CORSIKA. In this presentation, I will describe the simulated trigger efficiency with which the PMT system in ICARUS will identify neutrino events from two different neutrino beams, as well as the performance of the trigger system with relation to background. [Preview Abstract] |
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