D. Krasnopevtsev
A5083014520- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Solar and Space Plasma Dynamics
- Advanced Data Storage Technologies
- Scientific Computing and Data Management
- Medical Imaging Techniques and Applications
- Radiation Therapy and Dosimetry
- Digital Radiography and Breast Imaging
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Atomic and Subatomic Physics Research
- Structural Analysis of Composite Materials
- Atmospheric Ozone and Climate
- Nuclear physics research studies
- SARS-CoV-2 detection and testing
Massachusetts Institute of Technology
2021-2025
University of Science and Technology of China
2018-2024
Moscow Engineering Physics Institute
2014-2023
Boğaziçi University
2021-2023
The University of Adelaide
2014-2022
Ludwig-Maximilians-Universität München
2019-2020
European Organization for Nuclear Research
2020
Northern Illinois University
2020
Rutherford Appleton Laboratory
2014-2019
Jožef Stefan Institute
2019
We present results over an 11-year Solar cycle of cosmic antiprotons based on <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mn>1.1</a:mn><a:mo>×</a:mo><a:msup><a:mn>10</a:mn><a:mn>6</a:mn></a:msup></a:math> events in the rigidity range from 1.00 to 41.9 GV. The <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mover accent="true"><c:mi>p</c:mi><c:mo stretchy="false">¯</c:mo></c:mover></c:math> fluxes exhibit distinct properties. magnitude...
We present the precision measurement of daily proton fluxes in cosmic rays from May 20, 2011 to October 29, 2019 (a total 2824 days or 114 Bartels rotations) rigidity interval 1 100 GV based on 5.5×10^{9} protons collected with Alpha Magnetic Spectrometer aboard International Space Station. The exhibit variations multiple timescales. From 2014 2018, we observed recurrent flux a period 27 days. Shorter periods 9 and 13.5 are 2016. strength all three periodicities changes time rigidity....
We present the precision measurement of 2824 daily helium fluxes in cosmic rays from May 20, 2011 to October 29, 2019 rigidity interval 1.71 100 GV based on 7.6×10^{8} nuclei collected with Alpha Magnetic Spectrometer (AMS) aboard International Space Station. The flux and proton ratio exhibit variations multiple timescales. In nearly all time intervals 2014 2018, we observed recurrent a period 27 days. Shorter periods 9 days 13.5 are 2016. strength three periodicities changes rigidity....
We present the precision measurements of 11 years daily cosmic electron fluxes in rigidity interval from 1.00 to 41.9 GV based on 2.0×10^{8} electrons collected with Alpha Magnetic Spectrometer (AMS) aboard International Space Station. The exhibit variations multiple timescales. Recurrent flux periods 27 days, 13.5 and 9 days are observed. find that show distinctly different time proton fluxes. Remarkably, a hysteresis between is observed significance greater than 6σ at rigidities below 8.5...
We report the properties of precision time structures cosmic nuclei He, Li, Be, B, C, N, and O fluxes over an 11-year solar cycle from May 2011 to November 2022 in rigidity range 1.92 60.3 GV. The show similar but not identical variations with amplitudes decreasing increasing rigidity. In particular, below 3.64 GV B fluxes, 2.15 are significantly less affected by modulation than He flux. observe that these differences linearly correlated spectral indices fluxes. This shows, a...
We report the properties of sodium (Na) and aluminum (Al) cosmic rays in rigidity range 2.15 GV to 3.0 TV based on 0.46 million 0.51 nuclei collected by Alpha Magnetic Spectrometer experiment International Space Station. found that Na Al, together with nitrogen (N), belong a distinct ray group. In this group, we observe that, similar N flux, both flux Al are well described sums primary component (proportional silicon flux) secondary fluorine flux). The fraction increases for N, Na, fluxes...
We present the precision measurements of 11 years daily cosmic positron fluxes in rigidity range from 1.00 to 41.9 GV based on 3.4×10^{6} positrons collected with Alpha Magnetic Spectrometer (AMS) aboard International Space Station. The show distinctly different time variations electron at short and long timescales. A hysteresis between is observed a significance greater than 5σ rigidities below 8.5 GV. On contrary, proton similar variation. Remarkably, we found that are modulated more for 7...
Measurements of hadron production in the TeV energy range are one tasks future studies at Large Hadron Collider (LHC). The main goal these experiments is a study fundamental QCD processes this range, which very important not only for probing Standard Model but also ultrahigh-energy cosmic particle physics. One key elements measurements identification. detector technology has potential ability to separate hadrons Transition Radiation Detector (TRD) technology. TRD prototype based on straw...
Rapid increase of data volume from the experiments running at Large Hadron Collider (LHC) prompted physics computing community to evaluate new handling and processing solutions. Russian grid sites universities' clusters scattered over a large area aim task uniting their resources for future productive work, same time giving an opportunity support collaborations. In our project we address fundamental problem designing architecture integrate distributed storage LHC other data-intensive science...
In recent years, developments of gaseous detectors based on a combination electron multiplication gap in the gas and pixel readout chips as part anode plane (GasPixel detectors) reached level where they can offer unique opportunities for particle detection. Transition radiation (TR) this technology be one possible applications. work, measurements energy spectra angular distributions transition photons produced by particles with different gamma factors made GridPix detector prototype are...
Creation of global e-Infrastructure involves an integration isolated local resources into common heterogeneous computing environment. In 2014 a pioneering work to develop large scale data- and task- management system for federated has been started at the National Research Centre "Kurchatov Institute" (NRC KI, Moscow). As part this work, we have designed, developed deployed portal submit payloads infrastructure. It combines Tier-1, Cloud-infrastructure, supercomputer Kurchatov institute. This...
The ATLAS (one of two general purpose detectors at the LHC) Transition Radiation Tracker (TRT) is outermost three tracking subsystems Inner Detector. It a large straw-based detector and contains about 350,000 electronics channels. performance TRT as particularly particle identification strongly depends on stability operation parameters with most important parameter being gas gain which must be kept constant across volume. in straws can vary significantly atmospheric pressure, temperature,...
The Large Hadron Collider (LHC)' operating at the international CERN Laboratory in Geneva, Switzerland, is leading Big Data driven scientific explorations. Experiments LHC explore fundamental nature of matter and basic forces that shape our universe. Computing models for High Luminosity era anticipate a growth storage needs least orders magnitude; it will require new approaches data organization handling. In project we address problem designing architecture to integrate distributed...
The ATLAS Resistive Plate Chamber (RPC) detector is a tracking detector, used to primarily trigger muons in the barrel region (which corresponds pseudorapidity range of |η|<1.05) at 40 MHz collision rate, and provide η ϕ coordinates. RPC system consists about 3700 gas volumes covering sensitive surface 4000 m2. It arranged three concentric doublet layers radius 7 m, 8 m 10 operating an approximately 0.5–1 T toroidal magnetic field. RPCs up 6 space points along muon track with space-time...
ATLAS measurements of multi-boson production processes involving isolated photons in proton–proton collisions at 8 TeV are summarized. Standard Model cross sections measured with high precision and compared to theoretical predictions. No deviations from predictions observed limits placed on parameters used describe anomalous triple quartic gauge boson couplings.
The production of Z bosons with one or two isolated high-energy photons is studied using $pp$ collisions at $\sqrt{s}$ = 8 TeV. analyses use a data sample an integrated luminosity $20.3~fb^{-1}$ collected by the ATLAS detector during 2012 taking LHC. are used to make tests electroweak sector Standard Model (SM) and search for deviations that could provide evidence new physics beyond SM. $Z\gamma$ $Z\gamma\gamma$ cross sections measured leptonic decays boson then compared cross-section...