A Passive Shield for the RED-100 Neutrino Detector Akimov, D. Yu; Aleksandrov, I. S.; Belov, V. A. ...
Instruments and experimental techniques (New York),
03/2021, Letnik:
64, Številka:
2
Journal Article
Recenzirano
Odprti dostop
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A combined passive shield of the RED-100 two-phase emission neutrino detector has been developed and built for suppressing the background of external γ rays and neutrons. The shield is composed of ...a 5‑cm-thick copper layer (the inner layer is adjacent to the detector) and a water layer with a total thickness of approximately 70 cm (including the water inside the copper shield). The Monte Carlo simulation of the shielding efficiency has been performed. The obtained attenuation factor of the copper shield for the γ-ray background has been experimentally verified in a laboratory test using a NaI(Tl) scintillator detector. The γ‑ray background rejection factor of the full shield has also been calculated.
Abstract
In this article we describe the photon detection readout
electronics for the nEDM@SNS experiment. The chosen “photon
counting” architecture, which utilizes high-efficiency silicon
...photomultipliers (SiPMs) and is appropriate for low-light
applications, allows the use of a relatively high SiPM operating
voltage. This maximizes photon detection efficiency and minimizes
gain/efficiency voltage-dependence while eliminating direct optical
cross-talk.
We have shown that high voltage biased Hamamatsu R11410-20 photomultipliers with a dark count rate above 10kHz emit single photons. The effect has been observed in a few units at room temperature and ...temperatures reduced down to −60°C. The effect should be taken into account in experiments aimed on search for rare events with small energy depositions in massive liquid xenon detectors.
The two-phase closed tubular cryogenic thermosyphon Bolozdynya, A.I.; Dmitrenko, V.V.; Efremenko, Yu.V. ...
International journal of heat and mass transfer,
January 2015, 2015-01-00, 20150101, Letnik:
80
Journal Article
Recenzirano
The heat transfer characteristics of a two-phase closed tubular cryogenic thermosyphon filled with nitrogen fluid have been investigated. The thermosyphon consists of a 1.1cm inside diameter, 5m long ...copper tube coated with a few layers of the high-vacuum superinsulation and enclosed into a vacuum jacket. A free-boiling liquid nitrogen pool has been used as a cooling machine. The system is compact, free from mechanical vibrations, and can provide thermal stabilization of remotely located devices in the temperature range of 80–120K with the heat transfer limit up to 100W.
We present recent results on the first experimental observation of the coherent elastic scattering of the neutrino on atomic nuclei and review other experiments related to the detection and ...investigation of this process.
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.
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 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.
Status of the RED-100 experiment Akimov, D.Yu; Berdnikova, A.K.; Belov, V.A. ...
Journal of instrumentation,
06/2017, Letnik:
12, Številka:
6
Journal Article
Recenzirano
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.
The RED-100 two-phase emission detector Akimov, D. Yu; Aleksandrov, I. S.; Belov, V. A. ...
Instruments and experimental techniques (New York),
03/2017, Letnik:
60, Številka:
2
Journal Article
Recenzirano
The RED-100 experimental setup, which is designed to detect elastic coherent neutrino scattering off xenon nuclei, is described. One specific feature of this setup is the possibility of using it in ...above ground experiments. The setup is based on the RED-100 two-phase emission detector in which liquid xenon is used as a working medium for detection of rare events. The results of the technical run with the setup are presented. These are the evidence of the normal operation of all systems and the readiness of the setup for carrying out an experiment.
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