Development of a $^{83\mathrm{m}}$Kr source for the calibration of the CENNS-10 Liquid Argon Detector
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2020-10-21
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We report on the preparation of and calibration measurements with a $^{83\mathrm{m}}$Kr source for the CENNS-10 liquid argon detector. $^{83\mathrm{m}}$Kr atoms generated in the decay of a $^{83}$Rb source were introduced into the detector via injection into the Ar circulation loop. Scintillation light arising from the 9.4 keV and 32.1 keV conversion electrons in the decay of $^{83\mathrm{m}}$Kr in the detector volume were then observed. This calibration source allows the characterization of the low-energy response of the CENNS-10 detector and is applicable to other low-energy-threshold detectors. The energy resolution of the detector was measured to be 9$%$ at the total $^{83\mathrm{m}}$Kr decay energy of 41.5 keV. We performed an analysis to separately calibrate the detector using the two conversion electrons at 9.4 keV and 32.1 keV
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Collaboration, COHERENT, D Akimov, P An, C Awe, PS Barbeau, B Becker, V Belov, I Bernardi, et al. (2020). Development of a $^{83\mathrm{m}}$Kr source for the calibration of the CENNS-10 Liquid Argon Detector. Journal of Instrumentation, 16(4). pp. P04002–P04002. 10.1088/1748-0221/16/04/P04002 Retrieved from https://hdl.handle.net/10161/23997.
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Phillip S. Barbeau
Professor Barbeau’s research interests are predominantly in the fields of neutrino and astroparticle physics. His efforts are focused on (but not limited to) three major areas of research: studying the physics of coherent neutrino-nucleus scattering; novel searches for the dark matter in our universe; and searches for zero neutrino double beta decay. The unifying aspect of the work is the common need for new and creative detector development in order to solve some of the “hard” problems in low-background rare-event detection.
Diane M Markoff
Kate Scholberg
Prof. Scholberg's broad research interests include experimental elementary particle physics, astrophysics and cosmology. Her main specific interests are in neutrino physics. She has long-term involvement in Super-Kamiokande in Japan and the T2K ("Tokai to Kamioka") high-intensity beam experiment that sends neutrinos 300 km from an accelerator at the J-PARC facility in Japan to Super-K. She is a member of DUNE (Deep Underground Neutrino Experiment), the next-generation U.S.-based international experiment designed to observe neutrinos beamed from Fermilab to a large liquid argon detector at an underground facility in South Dakota. One of Prof. Scholberg's particular interests on DUNE is the detector's sensitivity to the huge bursts of neutrinos from core-collapse supernovae.
Prof. Scholberg serves as spokesperson of COHERENT, a multi-detector experiment with the primary physics goal of measuring CEvNS (Coherent Elastic Neutrino Nucleus Scattering) using the high-quality, high-intensity neutrinos produced by the Spallation Neutron Source at Oak Ridge National Laboratory in Tennessee. CEvNS is the interaction of a neutrino with an entire nucleus, resulting in a very tiny nuclear recoil. CEvNS was measured for the first time by the collaboration in 2017. COHERENT is currently engaged in multiple measurements of CEvNS on different nuclear targets, as well as a broad program of neutrino interaction measurements and beyond-the-standard-model physics searches.
Prof. Scholberg was a co-founder of SNEWS, the SuperNova Early Warning System, an inter-experiment collaboration of detectors with Galactic supernova sensitivity. Neutrinos from a core collapse will precede the photon signal by hours; therefore coincident observation of a burst in several neutrino detectors will be a robust early warning of a visible supernova. The goals of SNEWS are to provide the astronomical community with a prompt alert of a Galactic core collapse, as well as to optimize global sensitivity to supernova neutrino physics.
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