Browsing by Author "Bolozdynya, A"

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    A D2O detector for flux normalization of a pion decay-at-rest neutrino source
    (Journal of Instrumentation, 2021-08-01) Akimov, D; An, P; Awe, C; Barbeau, PS; Becker, B; Belov, V; Bernardi, I; Blackston, MA; Bolozdynya, A; Cabrera-Palmer, B; Chernyak, D; Conley, E; Daughhetee, J; Day, E; Detwiler, J; Ding, K; Durand, MR; Efremenko, Y; Elliott, SR; Fabris, L; Febbraro, M; Gallo Rosso, A; Galindo-Uribarri, A; Green, MP; Heath, MR; Hedges, S; Hoang, D; Hughes, M; Johnson, T; Khromov, A; Konovalov, A; Koros, J; Kozlova, E; Kumpan, A; Li, L; Link, JM; Liu, J; Mann, K; Markoff, DM; Mastroberti, J; Mueller, PE; Newby, J; Parno, DS; Penttila, SI; Pershey, D; Rapp, R; Ray, H; Raybern, J; Razuvaeva, O; Reyna, D; Rich, GC; Ross, J; Rudik, D; Runge, J; Salvat, DJ; Salyapongse, AM; Scholberg, K; Shakirov, A; Simakov, G; Sinev, G; Snow, WM; Sosnovstsev, V; Suh, B; Tayloe, R; Tellez-Giron-Flores, K; Tolstukhin, I; Ujah, E; Vanderwerp, J; Varner, RL; Virtue, CJ; Visser, G; Ward, EM; Wiseman, C; Wongjirad, T; Yen, YR; Yoo, J; Yu, CH; Zettlemoyer, J
    We report on the technical design and expected performance of a 592 kg heavy-water-Cherenkov detector to measure the absolute neutrino flux from the pion-decay-at-rest neutrino source at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL). The detector will be located roughly 20 m from the SNS target and will measure the neutrino flux with better than 5% statistical uncertainty in 2 years. This heavy-water detector will serve as the first module of a two-module detector system to ultimately measure the neutrino flux to 2-3% at both the First Target Station and the planned Second Target Station of the SNS. This detector will significantly reduce a dominant systematic uncertainty for neutrino cross-section measurements at the SNS, increasing the sensitivity of searches for new physics.
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    Development of a $^{83\mathrm{m}}$Kr source for the calibration of the CENNS-10 Liquid Argon Detector
    (Journal of Instrumentation, 2020-10-21) Collaboration, COHERENT; Akimov, D; An, P; Awe, C; Barbeau, PS; Becker, B; Belov, V; Bernardi, I; Blackston, MA; Blokland, L; Bolozdynya, A; Cabrera-Palmer, B; Chen, N; Chernyak, D; Conley, E; Daughhetee, J; Coello, M del Valle; Detwiler, JA; Durand, MR; Efremenko, Y; Elliott, SR; Fabris, L; Febbraro, M; Fox, W; Galindo-Uribarri, A; Rosso, A Gallo; Green, MP; Hansen, KS; Heath, MR; Hedges, S; Hughes, M; Johnson, T; Khromov, A; Konovalov, A; Kozlova, E; Kumpan, A; Li, L; Librande, JT; Link, JM; Liu, J; Mann, K; Markoff, DM; McGoldrick, O; Mueller, PE; Newby, J; Parno, DS; Pentilla, S; Pershey, D; Radford, D; Rapp, R; Ray, H; Raybern, J; Razuvaeva, O; Reyna, D; Rich, GC; Rudik, D; Runge, J; Salvat, DJ; Scholberg, K; Shakirov, A; Simakov, G; Snow, WM; Sosnovtsev, V; Suh, B; Tayloe, R; Tellez-Giron-Flores, K; Thornton, RT; Tolstukhin, I; Vanderwerp, J; Varner, RL; Venkataraman, R; Virtue, CJ; Visser, G; Wiseman, C; Wongjirad, T; Yang, J; Yen, Y-R; Yoo, J; Yu, C-H; Zettlemoyer, J
    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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    First Probe of Sub-GeV Dark Matter Beyond the Cosmological Expectation with the COHERENT CsI Detector at the SNS
    Akimov, D; An, P; Awe, C; Barbeau, PS; Becker, B; Belov, V; Bernardi, I; Blackston, MA; Bock, C; Bolozdynya, A; Browning, J; Cabrera-Palmer, B; Chernyak, D; Conley, E; Daughhetee, J; Detwiler, J; Ding, K; Durand, MR; Efremenko, Y; Elliott, SR; Fabris, L; Febbraro, M; Rosso, A Gallo; Galindo-Uribarri, A; Green, MP; Heath, MR; Hedges, S; Hoang, D; Hughes, M; Johnson, T; Khromov, A; Konovalov, A; Kozlova, E; Kumpan, A; Li, L; Link, JM; Liu, J; Mann, K; Markoff, DM; Mastroberti, J; Mueller, PE; Newby, J; Parno, DS; Penttila, SI; Pershey, D; Rapp, R; Raybern, J; Razuvaeva, O; Reyna, D; Rich, GC; Ross, J; Rudik, D; Runge, J; Salvat, DJ; Salyapongse, AM; Sander, J; Scholberg, K; Shakirov, A; Simakov, G; Sinev, G; Snow, WM; Sosnovstsev, V; Suh, B; Tayloe, R; Tellez-Giron-Flores, K; Tolstukhin, I; Ujah, E; Vanderwerp, J; Varner, RL; Virtue, CJ; Visser, G; Wongjirad, T; Yen, Y-R; Yoo, J; Yu, C-H; Zettlemoyer, J
    The COHERENT collaboration searched for scalar dark matter particles produced at the Spallation Neutron Source with masses between 1 and 220~MeV/c$^2$ using a CsI[Na] scintillation detector sensitive to nuclear recoils above 9~keV$_\text{nr}$. No evidence for dark matter is found and we thus place limits on allowed parameter space. With this low-threshold detector, we are sensitive to coherent elastic scattering between dark matter and nuclei. The cross section for this process is orders of magnitude higher than for other processes historically used for accelerator-based direct-detection searches so that our small, 14.6~kg detector significantly improves on past constraints. At peak sensitivity, we reject the flux consistent with the cosmologically observed dark-matter concentration for all coupling constants $\alpha_D<0.64$, assuming a scalar dark-matter particle. We also calculate the sensitivity of future COHERENT detectors to dark-matter signals which will ambitiously test multiple dark-matter spin scenarios.
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    LEGEND-1000 Preconceptual Design Report
    Collaboration, LEGEND; Abgrall, N; Abt, I; Agostini, M; Alexander, A; Andreoiu, C; Araujo, GR; III, FT Avignone; Bae, W; Bakalyarov, A; Balata, M; Bantel, M; Barabanov, I; Barabash, AS; Barbeau, PS; Barton, CJ; Barton, PJ; Baudis, L; Bauer, C; Bernieri, E; Bezrukov, L; Bhimani, KH; Biancacci, V; Blalock, E; Bolozdynya, A; Borden, S; Bos, B; Bossio, E; Boston, A; Bothe, V; Bouabid, R; Boyd, S; Brugnera, R; Burlac, N; Busch, M; Caldwell, A; Caldwell, TS; Carney, R; Cattadori, C; Chan, Y-D; Chernogorov, A; Christofferson, CD; Chu, P-H; Clark, M; Cohen, T; Combs, D; Comellato, T; Cooper, RJ; Costa, IA; D'Andrea, V; Detwiler, JA; Giacinto, A Di; Marco, N Di; Dobson, J; Drobizhev, A; Durand, MR; Edzards, F; Efremenko, Yu; Elliott, SR; Engelhardt, A; Fajt, L; Faud, N; Febbraro, MT; Ferella, F; Fields, DE; Fischer, F; Fomina, M; Fox, H; Franchi, J; Gala, R; Galindo-Uribarri, A; Gangapshev, A; Garfagnini, A; Geraci, A; Gilbert, C; Gold, M; Gooch, C; Gradwohl, KP; Green, MP; Grinyer, GF; Grobov, A; Gruszko, J; Guinn, I; Guiseppe, VE; Gurentsov, V; Gurov, Y; Gusev, K; Hacket, B; Hagemann, F; Hakenmüeller, J; Haranczyk, M; Hauertmann, L; Haufe, CR; Hayward, C; Heffron, B; Henkes, F; Henning, R; Aguilar, D Hervas; Hinton, J; Hodak, R; Hoffmann, H; Hofmann, W; Hostiuc, A; Huang, J; Hult, M; Mirza, M Ibrahim; Jochum, J; Jones, R; Judson, D; Junker, M; Kaizer, J; Kazalov, V; Kermaïdic, Y; Khushbakht, H; Kidd, M; Kihm, T; Kilgus, K; Kim, I; Klimenko, A; Knöpfle, KT; Kochetov, O; Konovalov, SI; Kontul, I; Kool, K; Kormos, LL; Kornoukhov, VN; Korosec, M; Krause, P; Kuzminov, VV; López-Castaño, JM; Lang, K; Laubenstein, M; León, E; Lehnert, B; Leonhardt, A; Li, A; Lindner, M; Lippi, I; Liu, X; Liu, J; Loomba, D; Lubashevskiy, A; Lubsandorzhiev, B; Lusardi, N; Müller, Y; Macko, M; Macolino, C; Majorovits, B; Mamedov, F; Maneschg, W; Manzanillas, L; Marshall, G; Martin, RD; Martin, EL; Massarczyk, R; Mei, D; Meijer, SJ; Mertens, S; Misiaszek, M; Mondragon, E; Morella, M; Morgan, B; Mroz, T; Muenstermann, D; Nave, CJ; Nemchenok, I; Neuberger, M; Oli, TK; Gann, G Orebi; Othman, G; Palušova, V; Panth, R; Papp, L; Paudel, LS; Pelczar, K; Perez, J Perez; Pertoldi, L; Pettus, W; Piseri, P; Poon, AWP; Povinec, P; Pullia, A; Radford, DC; Ramachers, YA; Ransom, C; Rauscher, L; Redchuk, M; Reine, AL; Riboldi, S; Rielage, K; Rozov, S; Rukhadze, E; Rumyantseva, N; Runge, J; Ruof, NW; Saakyan, R; Sailer, S; Salamanna, G; Salamida, F; Salvat, DJ; Sandukovsky, V; Schönert, S; Schültz, A; Schütt, M; Schaper, DC; Schreiner, J; Schulz, O; Schuster, M; Schwarz, M; Schwingenheuer, B; Selivanenko, O; Shafiee, M; Shevchik, E; Shirchenko, M; Shitov, Y; Simgen, H; Simkovic, F; Skorokhvatov, M; Slavickova, M; Smolek, K; Smolnikov, A; Solomon, JA; Song, G; Starosta, K; Stekl, I; Stommel, M; Stukov, D; Sumathi, RR; Sweigart, DA; Szczepaniec, K; Taffarello, L; Tagnani, D; Tayloe, R; Tedeschi, D; Turqueti, M; Varner, RL; Vasilyev, S; Veresnikova, A; Vetter, K; Vignoli, C; Vogl, C; Sturm, K von; Waters, D; Waters, JC; Wei, W; Wiesinger, C; Wilkerson, JF; Willers, M; Wiseman, C; Wojcik, M; Wu, VH-S; Xu, W; Yakushev, E; Ye, T; Yu, C-H; Yumatov, V; Zaretski, N; Zeman, J; Zhitnikov, I; Zinatulina, D; Zschocke, A-K; Zsigmond, AJ; Zuber, K; Zuzel, G
    We propose the construction of LEGEND-1000, the ton-scale Large Enriched Germanium Experiment for Neutrinoless $\beta \beta$ Decay. This international experiment is designed to answer one of the highest priority questions in fundamental physics. It consists of 1000 kg of Ge detectors enriched to more than 90% in the $^{76}$Ge isotope operated in a liquid argon active shield at a deep underground laboratory. By combining the lowest background levels with the best energy resolution in the field, LEGEND-1000 will perform a quasi-background-free search and can make an unambiguous discovery of neutrinoless double-beta decay with just a handful of counts at the decay $Q$ value. The experiment is designed to probe this decay with a 99.7%-CL discovery sensitivity in the $^{76}$Ge half-life of $1.3\times10^{28}$ years, corresponding to an effective Majorana mass upper limit in the range of 9-21 meV, to cover the inverted-ordering neutrino mass scale with 10 yr of live time.
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    Measurement of scintillation response of CsI[Na] to low-energy nuclear recoils by COHERENT
    Akimov, D; An, P; Awe, C; Barbeau, PS; Becker, B; Belov, V; Bernardi, I; Blackston, MA; Bock, C; Bolozdynya, A; Browning, J; Cabrera-Palmer, B; Chernyak, D; Conley, E; Daughhetee, J; Detwiler, J; Ding, K; Durand, MR; Efremenko, Y; Elliott, SR; Fabris, L; Febbraro, M; Rosso, A Gallo; Galindo-Uribarri, A; Green, MP; Heath, MR; Hedges, S; Hoang, D; Hughes, M; Johnson, T; Khromov, A; Konovalov, A; Kozlova, E; Kumpan, A; Li, L; Link, JM; Liu, J; Mann, K; Markoff, DM; Mastroberti, J; Melikyan, YA; Mueller, PE; Newby, J; Parno, DS; Penttila, SI; Pershey, D; Rapp, R; Ray, H; Raybern, J; Razuvaeva, O; Reyna, D; Rich, GC; Ross, J; Rudik, D; Runge, J; Salvat, DJ; Salyapongse, AM; Scholberg, K; Shakirov, A; Simakov, G; Sinev, G; Snow, WM; Sosnovstsev, V; Suh, B; Tayloe, R; Tellez-Giron-Flores, K; Tolstukhin, I; Ujah, E; Vanderwerp, J; Varner, RL; Virtue, CJ; Visser, G; Wongjirad, T; Yen, Y-R; Yoo, J; Yu, C-H; Zettlemoyer, J
    We present results of several measurements of CsI[Na] scintillation response to 3-60 keV energy nuclear recoils performed by the COHERENT collaboration using tagged neutron elastic scattering experiments and an endpoint technique. Earlier results, used to estimate the coherent elastic neutrino-nucleus scattering (CEvNS) event rate for the first observation of this process achieved by COHERENT at the Spallation Neutron Source (SNS), have been reassessed. We discuss corrections for the identified systematic effects and update the respective uncertainty values. The impact of updated results on future precision tests of CEvNS is estimated. We scrutinize potential systematic effects that could affect each measurement. In particular we confirm the response of the H11934-200 Hamamatsu photomultiplier tube (PMT) used for the measurements presented in this study to be linear in the relevant signal scale region.
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    Measurement of the Coherent Elastic Neutrino-Nucleus Scattering Cross Section on CsI by COHERENT
    Akimov, D; An, P; Awe, C; Barbeau, PS; Becker, B; Belov, V; Bernardi, I; Blackston, MA; Bock, C; Bolozdynya, A; Browning, J; Cabrera-Palmer, B; Chernyak, D; Conley, E; Daughhetee, J; Detwiler, J; Ding, K; Durand, MR; Efremenko, Y; Elliott, SR; Fabris, L; Febbraro, M; Rosso, A Gallo; Galindo-Uribarri, A; Green, MP; Heath, MR; Hedges, S; Hoang, D; Hughes, M; Johnson, T; Khromov, A; Konovalov, A; Kozlova, E; Kumpan, A; Li, L; Link, JM; Liu, J; Mann, K; Markoff, DM; Mastroberti, J; Mueller, PE; Newby, J; Parno, DS; Penttila, SI; Pershey, D; Rapp, R; Ray, H; Raybern, J; Razuvaeva, O; Reyna, D; Rich, GC; Ross, J; Rudik, D; Runge, J; Salvat, DJ; Salyapongse, AM; Scholberg, K; Shakirov, A; Simakov, G; Sinev, G; Snow, WM; Sosnovstsev, V; Suh, B; Tayloe, R; Tellez-Giron-Flores, K; Tolstukhin, I; Ujah, E; Vanderwerp, J; Varner, RL; Virtue, CJ; Visser, G; Wongjirad, T; Yen, Y-R; Yoo, J; Yu, C-H; Zettlemoyer, J
    We measured the cross section of coherent elastic neutrino-nucleus scattering (\cevns{}) using a CsI[Na] scintillating crystal in a high flux of neutrinos produced at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. New data collected before detector decommissioning has more than doubled the dataset since the first observation of \cevns{}, achieved with this detector. Systematic uncertainties have also been reduced with an updated quenching model, allowing for improved precision. With these analysis improvements, the COHERENT collaboration determined the cross section to be $(165^{+30}_{-25})\times10^{-40}$~cm$^2$, consistent with the standard model, giving the most precise measurement of \cevns{} yet. The timing structure of the neutrino beam has been exploited to compare the \cevns{} cross section from scattering of different neutrino flavors. This result places leading constraints on neutrino non-standard interactions while testing lepton flavor universality and measures the weak mixing angle as $\sin^2\theta_{W}=0.220^{+0.028}_{-0.026}$ at $Q^2\approx(50\text{ MeV})^2$
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    Monitoring the SNS basement neutron background with the MARS detector
    (JINST, 2021-12-05) Collaboration, COHERENT; Akimov, D; An, P; Awe, C; Barbeau, PS; Becker, B; Belov, V; Bernardi, I; Blackston, MA; Bock, C; Bolozdynya, A; Browning, J; Cabrera-Palmer, B; Chernyak, D; Conley, E; Daughhetee, J; Detwiler, J; Ding, K; Durand, MR; Efremenko, Y; Elliott, SR; Fabris, L; Febbraro, M; Rosso, A Gallo; Galindo-Uribarri, A; Green, MP; Heath, MR; Hedges, S; Hoang, D; Hughes, M; Johnson, BA; Johnson, T; Khromov, A; Konovalov, A; Kozlova, E; Kumpan, A; Li, L; Link, JM; Liu, J; Mann, K; Markoff, DM; Mastroberti, J; Mueller, PE; Newby, J; Parno, DS; Penttila, SI; Pershey, D; Rapp, R; Ray, H; Raybern, J; Razuvaeva, O; Reyna, D; Rich, GC; Ross, J; Rudik, D; Runge, J; Salvat, DJ; Salyapongse, AM; Scholberg, K; Shakirov, A; Simakov, G; Sinev, G; Snow, WM; Sosnovstsev, V; Suh, B; Tayloe, R; Tellez-Giron-Flores, K; Tolstukhin, I; Ujah, E; Vanderwerp, J; Varner, RL; Virtue, CJ; Visser, G; Wongjirad, T; Yen, Y-R; Yoo, J; Yu, C-H; Zettlemoyer, J
    We present the analysis and results of the first dataset collected with the MARS neutron detector deployed at the Oak Ridge National Laboratory Spallation Neutron Source (SNS) for the purpose of monitoring and characterizing the beam-related neutron (BRN) background for the COHERENT collaboration. MARS was positioned next to the COH-CsI coherent elastic neutrino-nucleus scattering detector in the SNS basement corridor. This is the basement location of closest proximity to the SNS target and thus, of highest neutrino flux, but it is also well shielded from the BRN flux by infill concrete and gravel. These data show the detector registered roughly one BRN per day. Using MARS' measured detection efficiency, the incoming BRN flux is estimated to be $1.20~\pm~0.56~\text{neutrons}/\text{m}^2/\text{MWh}$ for neutron energies above $\sim3.5$ MeV and up to a few tens of MeV. We compare our results with previous BRN measurements in the SNS basement corridor reported by other neutron detectors.
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    Simulating the neutrino flux from the Spallation Neutron Source for the COHERENT experiment
    Collaboration, COHERENT; Akimov, D; An, P; Awe, C; Barbeau, PS; Becker, B; Belov, V; Bernardi, I; Blackston, MA; Bock, C; Bolozdynya, A; Browning, J; Cabrera-Palmer, B; Chernyak, D; Conley, E; Daughhetee, J; Detwiler, J; Ding, K; Durand, MR; Efremenko, Y; Elliott, SR; Fabris, L; Febbraro, M; Galambos, J; Rosso, A Gallo; Galindo-Uribarri, A; Green, MP; Heath, MR; Hedges, S; Hoang, D; Hughes, M; Iverson, E; Johnson, T; Khromov, A; Konovalov, A; Kozlova, E; Kumpan, A; Li, L; Link, JM; Liu, J; Mann, K; Markoff, DM; Mastroberti, J; McIntyre, M; Mueller, PE; Newby, J; Parno, DS; Penttila, SI; Pershey, D; Rapp, R; Ray, H; Raybern, J; Razuvaeva, O; Reyna, D; Rich, GC; Rimal, D; Ross, J; Rudik, D; Runge, J; Salvat, DJ; Salyapongse, AM; Scholberg, K; Shakirov, A; Simakov, G; Sinev, G; Snow, WM; Sosnovstsev, V; Suh, B; Tayloe, R; Tellez-Giron-Flores, K; Tolstukhin, I; Trotter, S; Ujah, E; Vanderwerp, J; Varner, RL; Virtue, CJ; Visser, G; Wongjirad, T; Yen, Y-R; Yoo, J; Yu, C-H; Zettlemoyer, J; Zhang, S
    The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory is a pulsed source of neutrons and, as a byproduct of this operation, an intense source of pulsed neutrinos via stopped-pion decay. The COHERENT collaboration uses this source to investigate coherent elastic neutrino-nucleus scattering and other physics with a suite of detectors. This work includes a description of our Geant4 simulation of neutrino production at the SNS and the flux calculation which informs the COHERENT studies. We estimate the uncertainty of this calculation at about 10% based on validation against available low-energy pion production data.