Bulletin of the American Physical Society
Mid-Atlantic Section Fall Meeting 2020
Volume 65, Number 20
Friday–Sunday, December 4–6, 2020; Virtual
Session G02: Neutrinos II |
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Chair: Frank Schroeder, University of Delaware |
Saturday, December 5, 2020 4:15PM - 4:51PM |
G02.00001: Detecting Cosmic Neutrinos with IceCube at the Earth's South Pole Invited Speaker: Naoko Kurahashi Neilson The Universe has been studied using light since the dawn of astronomy, when starlight captured the human eye. The IceCube Neutrino Observatory observes the universe in a different and unique way: in high-energy neutrinos. IceCube discovered a diffuse flux of astrophysical neutrinos, in other words, celestial emission of high energy neutrinos, and started a new era of neutrino astronomy. I will motivate why neutrinos are a necessary messenger in high-energy astronomy, and discuss spatial analyses that aim to identify the sources of such astrophysical neutrinos. An attempt to reconcile our many results will draw a picture that is the current state of neutrino astronomy. [Preview Abstract] |
Saturday, December 5, 2020 4:51PM - 5:27PM |
G02.00002: Cosmic Neutrino Searches at High Elevations Invited Speaker: Stephanie Wissel Cosmic neutrinos probe astrophysics and fundamental physics at scales far beyond the reach of terrestrial accelerators or other cosmic messenger particles. The low expected flux of cosmic neutrinos drives the need for neutrino experiments to achieve larger exposures. Radio experiments can achieve such large exposures by taking advantage of the coherent broadband radio emission resulting from neutrino interactions as well as the large volumes visible from high elevations. In this talk, I will review results from current and future high-elevation radio experiments and discuss future concepts aimed at understanding cosmic engines and exploring particle interactions at the highest energies. [Preview Abstract] |
Saturday, December 5, 2020 5:27PM - 5:39PM |
G02.00003: Analogue-to-Digital Converter Timing Resolution in the AIT/NEO Experiment Timothy Emeigh, Tyler Anderson, Douglas Cowen, Aaron Fienberg, Eliza Neights AIT/NEO is an upcoming experiment that will be used to demonstrate the remote monitoring of nuclear reactors via their antineutrino signature in a kiloton-scale water Cherenkov detector. The experiment's readout will consist of thousands of photomultiplier tubes (PMTs), each read out by a custom waveform digitizer whose data can be used to extract photon count and arrival time. Selection of the appropriate sampling rate for the digitizer has important implications, with higher sampling rates offering possible improvements in timing resolution, and lower sampling rates offering decreased cost. This study compares the digitizer options of 250 MSPS and 500 MSPS to determine whether the lower sample rate can achieve acceptable timing. Waveforms were collected from a Hamamatsu 10" PMT using an oscilloscope with a very high sampling rate. The waveforms were then downsampled and system timing resolution was determined through two methods: a constant fraction discriminator (CFD) and a pulse fitter. While the results demonstrate that 500 MSPS does have improved timing over 250 MSPS, the lower rate will not significantly degrade the overall timing of the system when convolved with the inherent transit time spread of the PMT. [Preview Abstract] |
Saturday, December 5, 2020 5:39PM - 5:51PM |
G02.00004: Impact of Spectral Photon Sorting in Large-Scale Neutrino Detectors Samuel Young, Benjamin Land, Tanner Kaptanoglu, Meng Luo, Amanda Bacon, Joshua Klein The dichroicon, a Winston-style light concentrator built out of dichroic reflectors, achieves Cherenkov/scintillation separation with minimal photon loss by utilizing a technique called spectral photon sorting. This technique works by diverting long and short wavelength photons to separate photomultiplier tubes (PMTs). This separation allows for the identification of a pure population of Cherenkov photons outside of typical scintillation spectra while still detecting the large amount of scintillation needed for position and energy reconstruction. The separate identification of Cherenkov photons in a bright liquid scintillator provides extra information about the interaction of charged particles with the target, as such photons carry directionality and their ratio to scintillation light can be used for particle identification. Here we discuss the simulation and analysis of a next-generation liquid scintillator detector that demonstrates spectral photon sorting with dichroicons. [Preview Abstract] |
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