Bulletin of the American Physical Society
Mid-Atlantic Section 2022 Meeting
Volume 67, Number 20
Friday–Sunday, December 2–4, 2022; University Park, PA, Pennsylvania State University
Session D03: Neutrinos |
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Chair: Henrike Fleischhack, CUA/NASA GSFC Room: Pennsylvania State University Osmond 105 |
Saturday, December 3, 2022 11:00AM - 11:35AM |
D03.00001: Astrophysical Neutrino Sources with the IceCube Neutrino Observatory Invited Speaker: Michael Larson Since detector completion in 2011, the IceCube Neutrino Observatory has been searching for astrophysical neutrinos from high energy sources in the universe. IceCube has since observed an unresolved flux of astrophysical neutrinos at high energies. In 2017, IceCube identified the first likely astrophysical source of high energy neutrinos with the observation of a 290 TeV neutrino and a lower-energy time clustering of neutrinos from the direction of the blazar TXS 0506+056. A recently published analysis has now identified a second AGN, NGC 1068, as another potential source of high energy neutrinos with a significance of 4.2 sigma. In this talk, I will discuss the history of IceCube's astrophysical source searches and provide an overview of the new result. I will also discuss the prospects for a future planned detector expansion, IceCube-Gen2, which is expected to improve sensitivity to point sources by up to a factor of five compared to the existing IceCube detector. |
Saturday, December 3, 2022 11:35AM - 12:10PM |
D03.00002: Project 8: Measuring the Neutrino Mass using Cyclotron Radiation Emission Spectroscopy Invited Speaker: Luiz de Viveiros Project 8 is an experiment that seeks to determine the electron-weighted neutrino mass via the precise measurement of the electron energy in beta decays, with a sensitivity goal of 40 meV/c2. We have developed a technique called Cyclotron Radiation Emission Spectroscopy (CRES), which allows single electron detection and characterization through the measurement of cyclotron radiation emitted by magnetically-trapped electrons produced by a gaseous radioactive source. The technique has been successfully demonstrated on a small scale in waveguides to detect radiation from single electrons, and to measure the continuous spectrum from tritium. In order to achieve the projected sensitivity, the experiment will require novel technologies for performing CRES using tritium atoms in a magneto-gravitational trap in a multi-cubic-meter volume. In this talk, I will present a brief overview of the Project 8 experimental program, highlighting the latest results including our first tritium endpoint measurement and neutrino mass limit, and introduce the development of the techniques needed to deploy CRES at large scales. |
Saturday, December 3, 2022 12:10PM - 12:22PM |
D03.00003: The IceCube-Gen2 Surface Array Frank G Schroeder IceCube-Gen2 will extend the science reach of the current IceCube Neutrino Observatory at the South Pole in many ways. The optical array in the ice will be enlarged by an order of magnitude to increase the exposure for astrophysical TeV and PeV neutrions, and be complemented by a large radio array to search for neutrinos at even higher energies. A surface array will cover the footprint of the optical array. In addition to its function as a veto, this surface array will enable a strong cosmic-ray science case including both, the particle physics and astrophysics aspects of cosmic-ray physics. The combination of elevated scintillation and radio detectors at the surface with the in-ice optical array will make IceCube-Gen2 a unique laboratory for the particle physics in air showers, which enables new studies of the production of atmospheric leptons at TeV to PeV energies, such as prompt muons. Moreover, IceCube-Gen2 will feature a high aperture in combination with a high measurement accuracy for cosmic rays in the energy range of the assumed transition from Galactic to extragalactic sources, and may shed light on the still unkown origin of the most energetic Galactic cosmic rays. |
Saturday, December 3, 2022 12:22PM - 12:34PM |
D03.00004: Calibration of SKALA V2 Antennas for the IceCube-Gen2 Surface Array Isabella Brewer, Alexander Novikov, Frank G Schroeder, Alan Coleman The planned IceCube-Gen2 Surface Array will combine multiple detection techniques, such as elevated radio antennas and plastic scintillator panels, to detect cosmic-ray air showers and provide background rejection of atmospheric muons for the in-ice neutrino detector. The calibration and characterization of the SKALA v2 radio antennas, which will detect the electromagnetic component of the air showers, is the focus of this talk. Understanding the performance of the SKALA V2 antennas and the low-noise amplifiers (LNAs) within the antennas is critical for accurately reconstructing the energy of the air shower. The direction-dependent antenna gain of SKALA v2 needs to be known much better than 20% to reach the goal of 10% absolute accuracy of the cosmic ray energy. In a preliminary analysis, we find that the LNAs are sensitive to orientation, with different orientations yielding a difference in gain greater than 10%, indicating that LNA configurations must be accounted for in calibration. We will present a first analysis of calibration measurements and a comparison to a simulated antenna model. |
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