Bulletin of the American Physical Society
Prairie Section Fall 2022 Meeting
Volume 67, Number 12
Thursday–Saturday, October 13–15, 2022; University of South Dakota, Sioux Falls, SD
Session C01: Parallel Session I |
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Chair: Jing Liu, University of South Dakota Room: University of South Dakota Avera Lecture Hall |
Friday, October 14, 2022 10:45AM - 10:57AM |
C01.00001: The Majorana Demonstrator experiment Laxman Sharma Paudel The Majorana Demonstrator experiment searches for neutrinoless double-beta decay 0νββ in 76Ge using p-type point contact high purity germanium detectors. The Demonstrator has successfully completed its data-taking for 0νββ in March 2021. The enriched detectors were then removed for the deployment in the 200 kg phase of the Large Enriched Germanium Detectors for Neutrinoless Double-beta Decay (LEGEND) experiment. Currently, Majorana is using only natural detectors to study the background and other physics searches including Tantalum-180m decay. The final results of the Majorana Demonstrator with an active enriched exposure of 64.5 kg-yr achieved an excellent energy resolution of 2.52 keV FWHM at the 2039 keV $Q_ββ}$ and set a lower half-life limit of yr (90% C.L.) for 0νββ in 76Ge. The low backgrounds and excellent energy resolution favor the Demonstrator to search for additional physics beyond the Standard Model (BSM). In this talk, we will overview the Majorana Demonstrator experiment and present the final result. The talk will also discuss the BSM searches in Majorana. |
Friday, October 14, 2022 10:57AM - 11:09AM |
C01.00002: Development of Germanium (Ge) Ring Contact Detectors for Ge-based Neutrinoless Double-Beta Decay Experiment Kunming Dong, Wenzhao Wei, Rusty Harris, Dongming Mei, John F Wilkerson, David C Radford, Brady Bos The next generation neutrinoless double beta (0νββ) decay experiments aim to achieve the decay half-life of ~1028 years. Germanium (Ge)-based experiment has great chance to achieve the discovery potential for this rare decay process due to its excellent energy resolution to reject 2νββ decay events. LEGEND-1000 prefers large-size detectors (>3 kg per detector), which will further reduce backgrounds, complexity, and cost. This talk will explore large-size detectors through conducting research and development (R&D) of Ge ring-contact (GeRC) detectors using high-purity Ge crystals grown at USD. The detector is designed between ORNL, UNC, and USD. We fabricate GeRC detectors at TAMU and test them at UNC. The GeRC detector technology can potentially increase the mass per Ge detector for LEGEND-1000. Due to the physical properties of Ge crystal and the geometric structure of the detector, the fabrication process is complex. At TAMU, we have overcome many difficulties and gained a lot of experience in making GeRC detectors. This talk will report some initial results about the GeRC detector fabricated at TAMU using the USD-grown crystals. |
Friday, October 14, 2022 11:09AM - 11:21AM |
C01.00003: A particle tracker for diffusion cloud chambers Murtuza S Taqi, Timothy D Wiser, Zoe Rechav
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Friday, October 14, 2022 11:21AM - 11:33AM |
C01.00004: Cryogenic scintillating crystals for NSIs and accelerator-based dark matter search Keyu Ding The feasibility of using an undoped cesium iodide (CsI) detector directly coupled to SiPM arrays in a cryogenic environment at the Spallation Neutron Source (SNS), Oak Ridge National Laboratory (ORNL) for the detection of low-mass dark matter (LDM) particles (~MeV) and non-standard neutrino interactions (NSIs), was studied as part of the detector R&D effort of the COHERENT experiment. |
Friday, October 14, 2022 11:33AM - 11:45AM |
C01.00005: Characterization of undoped CsI at cryogenic temperatures Yongjin Yang Doped CsI (Cesium iodide) and NaI(Sodium iodide) are widely used as detectors to detector the neutrinos event. 185Kg NaI[Tl] has been used as detector in COHERENT. But pure CSI can only perform well at low temperature due to its scintillator mechanism. The light yield at low temperature is even better than that of doped CsI and NaI. So, we want to study its characterization at low temperature. The light yield has been measured over the temperature range from 1.7K to 300K. But the nuclear recoil quenching factor haven’t been measured at low temperature. In this talk, we will describe the experiment of our light yield and quenching factor measurement of the pure CsI at 77K. |
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