Current status of new SAGE project with 51Cr neutrino source

Gavrin, V.; Cleveland, B.; Danshin, S.; Elliott, Steven Ray; Gorbachev, V.; Ibragimova, T.; Kalikhov, A.; Knodel, T.; Kozlova, Yu.; Malyshkin, Yu.; Matveev, V.; Mirmov, I.; Nico, J.; Robertson, R. G.  H.; Shikhin, A.; Sinclair, D.; Veretenkin, E.; Wilkerson, J.

doi:10.1134/S1063779615020100

Title: Current status of new SAGE project with ⁵¹Cr neutrino source

Journal Article · Sun Mar 15 00:00:00 EDT 2015 · Physics of Particles and Nuclei

DOI:https://doi.org/10.1134/S1063779615020100· OSTI ID:1440431

Gavrin, V. ^[1]; Cleveland, B. ^[2]; Danshin, S. ^[1];

^[3]; Gorbachev, V. ^[1]; Ibragimova, T. ^[1]; Kalikhov, A. ^[1]; Knodel, T. ^[1]; Kozlova, Yu. ^[1]; Malyshkin, Yu. ^[1]; Matveev, V. ^[4]; Mirmov, I. ^[1]; Nico, J. ^[5]; Robertson, R. G. H. ^[6]; Shikhin, A. ^[1]; Sinclair, D. ^[7]; Veretenkin, E. ^[1]; Wilkerson, J. ^[8]

Russian Academy of Sciences (RAS), Moscow (Russian Federation). Inst. for Nuclear Research
SNOLAB, Sudbury, ON (Canada)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Russian Academy of Sciences (RAS), Moscow (Russian Federation). Inst. for Nuclear Research; Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation)
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Univ. of Washington, Seattle, WA (United States). Center for Experimental Nuclear Physics and Astrophysics
Carleton Univ., Ottawa, ON (Canada). Dept. of Physics
Univ. of North Carolina, Chapel Hill, NC (United States). Dept. of Physics

A very short-baseline neutrino oscillation experiment with an intense ⁵¹Cr neutrino source is currently under construction at the Baksan Neutrino Observatory of the Institute for Nuclear Research RAS (BNO). The experiment, which is based on the existing SAGE experiment, will use an upgraded Gallium-Germanium Neutrino Telescope (GGNT) and an artificial ⁵¹Cr neutrino source with activity ~3 MCi to search for transitions of active neutrinos to sterile states with Δm² ~1 eV². The neutrino source will be placed in the center of a liquid Ga metal target that is divided into two concentric zones, internal and external. The average path length of neutrinos in each zone will be the same and the neutrino capture rate will be measured separately in each zone. The oscillation signature, which comes from the ratio of events in the near and far gallium volumes, will be largely free of systematic errors, such as may occur from cross section and source strength uncertainties, and will provide a clean signal of electron neutrino disappearance into a sterile state at baselines of about 0.6 and 2.0 m. The sensitivity to the disappearance of electron neutrinos is expected to be a few percent. Construction of this set of new facilities, including a two-zone tank for irradiation of 50 tons of Ga metal with the intense ⁵¹Cr source, as well as additional modules of the GGNT counting and extraction systems, is close to completion. In order to check the new facilities they will first be used for SAGE solar neutrino measurements.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE; Russian Academy of Sciences (RAS); Russian Foundation for Basic Research (RFBR); Grant of the President of the Russian Federation

Grant/Contract Number:: AC52-06NA25396; 11-02-00806-a; 11-02-12130-ofi-m-2011; 13-02-12075-ofi-m-2013; NS-871.2012.2

OSTI ID:: 1440431

Report Number(s):: LA-UR-15-25591; TRN: US1900729

Journal Information:: Physics of Particles and Nuclei, Vol. 46, Issue 2; ISSN 1063-7796

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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Title: Current status of new SAGE project with 51Cr neutrino source

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