The RED-100 experiment with a liquid xenon target was carried out at Kalinin Nuclear Power Plant. The goal of the experiment is the detection and study of the coherent elastic neutrino nucleus ...scattering process (CE\(\nu\)NS) for the low-energy antineutrinos in close vicinity to a reactor core. A good understanding of the external radioactive background is needed to achieve this goal. This paper describes the external background conditions for the RED-100 experiment at Kalinin Nuclear Power Plant.
Status of the RED-100 experiment Akimov, D.Yu; Berdnikova, A.K.; Belov, V.A. ...
Journal of instrumentation,
06/2017, Volume:
12, Issue:
6
Journal Article
Peer reviewed
The current status of the RED-100 experiment is described. The detector is being prepared for the experiment on the first observation of a coherent elastic neutrino-nucleus scattering at the Kalinin ...Nuclear Power Plant (Russia). The estimation of the signal event rate for this process has been done by Monte Carlo with the use of the full detector geometry and the modern data on the ionisation yield for nuclear recoils in the liquid xenon. The simulation has shown very promising significant increase of it, by at least a factor of 2, in compare with our previous estimations.
Abstract
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 ± 0.56 neutrons/m^2/MWh
for neutron energies above ∼3.5 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.
The RED-100 experiment D Yu Akimov; Alexandrov, I S; Alyev, R R ...
arXiv (Cornell University),
11/2022
Paper, Journal Article
Open access
The RED-100 two-phase xenon emission detector has been deployed at 19-m distance from the reactor core of the Kalinin Nuclear Power Plant (KNPP) in 2021 - 2022 for investigation of the possibility to ...observe reactor antineutrinos using the effect of coherent elastic neutrino-nucleus scattering (CE{\nu}NS). The performance of the main systems of the RED-100 setup at operating nuclear power plant is described. There is no correlation of the radioactive background at the experimental setup site with ON and OFF states of the reactor. The data taking run was carried out at the beginning of the year 2022 and covered both the reactor OFF and ON periods.
Results of the experimental study of electron emission from liquid xenon via electroluminescence of the gas phase are presented. We report on observation of a peculiar kind of delayed ...electroluminescent signal following initial electroluminescence caused by ionizing particles. We also present the results of a study of spontaneous single electron emission following cosmic muon signals. It was found that the rate of spontaneous single electron signals strongly depends on the time passed since the initial electroluminescence happened. The analysis of experimental data showed that both spontaneous single electron signals and delayed electroluminescent signals are associated with ionization electrons which are trapped by the potential barrier at the interface.
We report on the preparation of and calibration measurements with a 83mKr source for the CENNS-10 liquid argon detector. 83mKr atoms generated in the decay of a 83Rb 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 83mKr 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 83mKr 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.
We present the results of the first detailed experimental study of ionization yield of electron recoils with energies below 100 keV produced in liquid xenon by the isotopes super(37) Ar, super(83m) ...Kr, super(241) Am, super(129) Xe, super(131) Xe. It is confirmed by a direct measurement with super(37) Ar isotope (2.82 keV) that the ionization yield increases with the energy decrease in the energy range below ~ 10 keV in accord with the NEST predictions. Decay time of scintillation at 2.82 keV is measured to be tau = 25 + or - 3 ns at electric field 3.75 kV/cm.
Using an 185-kg NaITl array, COHERENT has measured the inclusive electron-neutrino charged-current cross section on ^{127}I with pion decay-at-rest neutrinos produced by the Spallation Neutron Source ...at Oak Ridge National Laboratory. Iodine is one the heaviest targets for which low-energy (≤50 MeV) inelastic neutrino-nucleus processes have been measured, and this is the first measurement of its inclusive cross section. After a five-year detector exposure, COHERENT reports a flux-averaged cross section for electron neutrinos of 9.2_{-1.8}^{+2.1}×10^{-40} cm^{2}. This corresponds to a value that is ∼41% lower than predicted using the MARLEY event generator with a measured Gamow-Teller strength distribution. In addition, the observed visible spectrum from charged-current scattering on ^{127}I has been measured between 10 and 55 MeV, and the exclusive zero-neutron and one-or-more-neutron emission cross sections are measured to be 5.2_{-3.1}^{+3.4}×10^{-40} and 2.2_{-0.5}^{+0.4}×10^{-40} cm^{2}, respectively.
Full text
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We propose to detect and to study neutrino neutral current coherent scattering off atomic nuclei with a two-phase emission detector using liquid xenon as a working medium. Expected signals and ...backgrounds are calculated for two possible experimental sites: the Kalinin Nuclear Power Plant in the Russian Federation and the Spallation Neutron Source at the Oak Ridge National Laboratory in the U.S.A. Both sites have advantages as well as limitations. The experiment looks feasible at either location.
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