A. G. Kovalenko
A5056366304- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Discourse Analysis and Cultural Communication
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Sociopolitical Dynamics in Russia
- Quantum, superfluid, helium dynamics
- Language, Communication, and Linguistic Studies
- Nuclear Physics and Applications
- Central Asia Education and Culture
- Soviet and Russian History
- Radiation Therapy and Dosimetry
- Particle Accelerators and Free-Electron Lasers
- Spectroscopy and Laser Applications
- Library Science and Information
- Security, Politics, and Digital Transformation
- Psycholinguistics and Behavioral Studies
- Education, Literature, Philosophy Research
- Scientific Research and Discoveries
- Cultural, Linguistic, Economic Studies
- Calibration and Measurement Techniques
- Plant Surface Properties and Treatments
- Magnetic confinement fusion research
Peoples' Friendship University of Russia
2014-2023
Kurchatov Institute
2014-2023
Moscow Engineering Physics Institute
2014-2023
Institute for Theoretical and Experimental Physics
2010-2020
University of Coimbra
2012
Institute on Taxation and Economic Policy
2010
Ukrainian State University of Railway Transport
2008
The ZEPLIN-III experiment in the Palmer Underground Laboratory at Boulby uses a 12 kg two-phase xenon time-projection chamber to search for weakly interacting massive particles (WIMPs) that may account dark matter of our Galaxy. detector measures both scintillation and ionization produced by radiation liquid differentiate between nuclear recoils expected from WIMPs electron-recoil background signals down $\ensuremath{\sim}10\text{ }\text{ }\mathrm{keV}$ nuclear-recoil energy. An analysis...
We report experimental upper limits on WIMP-nucleon elastic scattering cross sections from the second science run of ZEPLIN-III at Boulby Underground Laboratory. A raw fiducial exposure 1344 kg⋅days was accrued over 319 days continuous operation between June 2010 and May 2011. total eight events observed in signal acceptance region nuclear recoil energy range 7–29 keV, which is compatible with background expectations. This allows exclusion scalar cross-section above 4.8×10−8 pb near 50...
We studied the application of statistical reconstruction algorithms, namely maximum likelihood and least squares methods, to problem event in a dual phase liquid xenon detector. An iterative method was developed for in-situ PMT light response functions from calibration data taken with an uncollimated gamma-ray source. Using techniques described, performance ZEPLIN-III dark matter detector 122 keV gamma-rays. For inner part (R<100 mm), spatial resolutions 13 mm 1.6 FWHM were measured...
This article analyzes the genesis and evolution of literary conflict from Antiquity to Middle Ages. Employing historical-philosophical critical methods, authors investigate theoretical underpinnings conflict, its structural features, transformations across different eras. Particular attention is paid a comparative analysis approaches ancient philosophers such as Aristotle Plato, interpretations in medieval literature, where internal moral spiritual contradictions predominate. The findings...
We present new experimental constraints on the WIMP-nucleon spin-dependent elastic cross sections using data from first science run of ZEPLIN-III, a two-phase xenon experiment searching for galactic dark matter weakly interacting massive particles based at Boulby mine. Analysis ∼450 kg·days fiducial exposure allow us to place 90%-confidence upper limit pure WIMP-neutron section σn=1.9×10−2 pb 55 GeV/c2 WIMP mass. Recent calculations nuclear spin structure Bonn charge-dependent...
Scintillation and ionisation yields for nuclear recoils in liquid xenon above 10 keVnr (nuclear recoil energy) are deduced from data acquired using broadband Am-Be neutron sources. The several exposures to two sources were compared detailed simulations. Energy-dependent scintillation giving acceptable fits the derived. Efficiency resolution effects treated a light collection Monte Carlo, measured photomultiplier response profiles hardware trigger studies. A gradual fall yield below ~40 is...
The RED-100 two-phase xenon emission detector has been deployed at 19-m distance from the reactor core of Kalinin Nuclear Power Plant (KNPP) in 2021 - 2022 for investigation possibility to observe antineutrinos using effect coherent elastic neutrino-nucleus scattering (CE{\nu}NS). performance main systems setup operating nuclear power plant is described. There no correlation radioactive background experimental site with ON and OFF states reactor. data taking run was carried out beginning...
We present limits on the WIMP-nucleon cross section for inelastic dark matter derived from 2008 run of ZEPLIN-III. Cuts, notably scintillation pulse shape and scintillation-to-ionisation ratio, give a net exposure 63 kg.days in range 20-80keV nuclear recoil energy, which 6 events are observed. Upper signal rate maximum empty patch data. Under standard halo assumptions small region parameter space consistent, at 99% CL, with causing 1.17 ton.year DAMA modulation is allowed 90% CL: it mass...
The current status of the RED-100 experiment is described. detector being prepared for on first observation a coherent elastic neutrino-nucleus scattering at Kalinin Nuclear Power Plant (Russia). estimation signal event rate this process has been done by Monte Carlo with use full geometry and modern data ionisation yield nuclear recoils in liquid xenon. simulation shown very promising significant increase it, least factor 2, compare our previous estimations.
Plastic scintillators are widely used in industry, medicine, and scientific research, including nuclear particle physics. Although one of their most common applications is neutron detection, experimental data on response to low-energy recoils scarce. Here, the relative scintillation efficiency for neutron-induced a polystyrene-based plastic scintillator (UPS-923A) presented, exploring recoil energies between 125 850 keV. Monte Carlo simulations, incorporating light collection energy...
Results of the experimental study electron emission from liquid xenon via electroluminescence gas phase are presented. We report on observation a peculiar kind delayed electroluminescent signal following initial caused by ionizing particles. also present results spontaneous single cosmic muon signals. It was found that rate signals strongly depends time passed since happened. The analysis data showed both and associated with ionization electrons which trapped potential barrier at interface.
RED-100 is a two-phase detector for study of coherent elastic scattering reactor electron antineutrinos off xenon atomic nuclei. The contains total 200 kg liquid in titanium cryostat with 160 active volume inside Teflon-made light collection cage associated electrode system. viewed by two arrays nineteen 3''-diameter Hamamatsu R11410-20 PMTs assembled planes on top and bottom. system equipped an shutter (a patented device) to reduce "spontaneous" single-electron noise. was tested...