Bulletin of the American Physical Society
2016 Fall Meeting of the APS Division of Nuclear Physics
Volume 61, Number 13
Thursday–Sunday, October 13–16, 2016; Vancouver, BC, Canada
Session KD: Mini-symposium on Investigations of the Reactor Neutrino Anomalies: IIMini-Symposium
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Chair: Ryan MacLellan, University of South Dakota Room: Junior Ballroom C |
Saturday, October 15, 2016 2:00PM - 2:12PM |
KD.00001: Applied antineutrino measurements: synergies between short-baseline physics and reactor safeguards Timothy Classen The experimental neutrino community has put forth an incredible effort into designing a multitude of detection systems to meet the needs of the short-baseline neutrino program. There is significant overlap between the requirements for these detectors, and those of a detector designed for reactor monitoring through antineutrinos. Here we describe how such technology improvements provide opportunities to probe fissile isotope and fission daughter distributions, and their potential use for reactor physics and safeguards applications. [Preview Abstract] |
Saturday, October 15, 2016 2:12PM - 2:24PM |
KD.00002: Experimental Constraints on Neutrino Spectra Following Fission Jim Napolitano We discuss new initiatives to constrain predictions of fission neutrino spectra from nuclear reactors. These predictions are germane to the understanding of reactor flux anomalies; are needed to reduce systematic uncertainty in neutrino oscillation spectra; and inform searches for the diffuse supernova neutrino background. The initiatives include a search for very high-$Q$ beta decay components to the neutrino spectrum from the Daya Bay power plant; plans for a measurement of the $\beta^-$ spectrum from $^{252}$Cf fission products; and precision measurements of the $^{235}$U fission neutrino spectrum from PROSPECT and other very short baseline reactor experiments. [Preview Abstract] |
Saturday, October 15, 2016 2:24PM - 2:36PM |
KD.00003: Measurement of reactor antineutrino flux and spectrum at Daya Bay Ka Vang Tsang The Daya Bay Reactor Neutrino Experiment consists of eight antineutrino detectors placed at different baselines from six 2.9 $\mathrm{GW}_\mathrm{th}$ nuclear reactors. Since the start of data taking in late 2011, the experiment has collected the largest sample of reactor antineutrino interactions. A measurement of the reactor antineutrino flux and spectrum, and its comparison to the prediction of emission models for nuclear reactors will be presented. The capability of monitoring plutonium production in the Daya Bay cores via the measurement of time-dependent variations in the detected reactor antineutrino spectrum will also be discussed. [Preview Abstract] |
Saturday, October 15, 2016 2:36PM - 2:48PM |
KD.00004: PROSPECT: The Precision Reactor Oscillation and Spectrum Experiment Thomas Langford PROSPECT is a phased experiment consisting of segmented $^6$Li-loaded liquid scintillator antineutrino detectors designed to probe short-baseline neutrino oscillations and precisely measure the reactor antineutrino spectrum. The experiment will be located at the High Flux Isotope Reactor (HFIR) at Oak Ridge National Lab. The first phase is a movable $\sim$3~tonne detector located 7-12~m from the compact, highly enriched uranium core. Over the past three years, PROSPECT has deployed multiple detectors at HFIR to understand the local background environment and demonstrate active and passive background rejection. Measuring the neutrino spectrum from $^{235}$U will give insight to the recent spectral discrepancies and provide an important benchmark for future reactor experiments. PROSPECT will probe the sterile neutrino best-fit region at 3$\sigma$ within one year of operation at HFIR. We will discuss the design, experimental program, and discovery potential of the experiment. [Preview Abstract] |
Saturday, October 15, 2016 2:48PM - 3:00PM |
KD.00005: Development and Characterization of $^6$Li-doped Liquid Scintillator Detectors for PROSPECT Jeremy Gaison PROSPECT, the Precision Reactor Oscillation and Spectrum experiment, is a phased reactor antineutrino experiment designed to search for eV-scale sterile neutrinos via short-baseline neutrino oscillations and to make a precision measurement of the $^{235}$U reactor antineutrino spectrum. A multi-ton, optically segmented detector will be deployed at Oak Ridge National Laboratory's (ORNL) High Flux Isotope Reactor (HFIR) to measure the reactor spectrum at baselines ranging from 7-12m. A two-segment detector prototype with 50 liters of active liquid scintillator target has been built to verify the detector design and to benchmark its performance. In this presentation, we will summarize the performance of this detector prototype and describe the optical and energy calibration of the segmented PROSPECT detectors. [Preview Abstract] |
Saturday, October 15, 2016 3:00PM - 3:12PM |
KD.00006: Status of the SOX experiment Jelena Maricic Observation of the oscillation pattern as a function of distance from the neutrino source will provide a very strong argument in favor of neutrino mixing with sterile neutrinos and their existence. SOX experiment will perform such measurement. A strong antineutrino generator $^{144}$Ce-$^{144}$Pr (CeANG) with the activity between 3.7-5.5 PBq will be placed below the Borexino detector, measuring the electron antineutrino rate and spectrum as a function of distance from the generator. Borexino is a large 300 ton detector located at the Gran Sasso national laboratory in Italy. The antineutrino generator will be placed under the detector in a dedicated pit providing the continuous oscillation sampling distance from 4 - 12 m. The CeANG will be produced at a dedicated facility called Mayak in Russia, while the 2.2 ton tungsten shield has been produced at the Xiamen company in China. Details of the experiment, source production and sensitivity to neutrino oscillations in SOX will be presented. [Preview Abstract] |
Saturday, October 15, 2016 3:12PM - 3:24PM |
KD.00007: The Goals and Status of SoLid Experiment Jaewon Park SoLid is a short baseline sterile neutrino oscillation search experiment using the BR2 compact core reactor in Belgium. Ruling out or confirming sterile neutrino is one of main interests in the neutrino physics field. Highly segmented scintillator cube detector with $^{\mathrm{6}}$LiF:ZnS(Ag) neutron screen provides high purity neutron tagging by pulse shape discrimination (PSD), and capture position identification. These capabilities from this novel detector are critical to isolate neutrino interactions in a high background environment. The prototype detector (SM1) provides important feedback for validating the performance of the detector design. Recent results from SM1 will be presented. Construction of the SoLid Phase-1 detector is underway. The three-ton detector with three years running will allow us to reach the sterile neutrino exclusion limit of sin$^{\mathrm{2}}$2$\theta $ \textless 0.03 at $\Delta m^{\mathrm{2\thinspace }}$\textasciitilde 2 eV$^{\mathrm{2}}$ at the 99{\%} confidence level. [Preview Abstract] |
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