A. Tykhonov
A5023896164- 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
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Computational Physics and Python Applications
- Black Holes and Theoretical Physics
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Solar and Space Plasma Dynamics
- advanced mathematical theories
- Nuclear Physics and Applications
- Distributed and Parallel Computing Systems
- Medical Imaging Techniques and Applications
- Nuclear reactor physics and engineering
- Advanced Data Storage Technologies
- Spacecraft Design and Technology
- Advanced X-ray and CT Imaging
- Spacecraft and Cryogenic Technologies
- Particle accelerators and beam dynamics
- Geophysics and Gravity Measurements
- Muon and positron interactions and applications
University of Geneva
2016-2025
Laboratoire de Physique Corpusculaire
2023
Chinese Academy of Sciences
2023
University of Sassari
2021
University of Palermo
2021
University of Science and Technology of China
2016-2017
Campbell Collaboration
2017
University of Ljubljana
2010-2016
The University of Adelaide
2013-2016
Jožef Stefan Institute
2010-2016
The precise measurement of the spectrum protons, most abundant component cosmic radiation, is necessary to understand source and acceleration rays in Milky Way. This work reports ray proton fluxes with kinetic energies from 40 GeV 100 TeV, two a half years data recorded by DArk Matter Particle Explorer (DAMPE). first time an experiment directly measures protons up ~100 TeV high statistics. measured confirms spectral hardening found previous experiments reveals softening at ~13.6 index...
The measurement of the energy spectrum cosmic ray helium nuclei from 70 GeV to 80 TeV using 4.5 years data recorded by Dark Matter Particle Explorer (DAMPE) is reported in this work. A hardening observed at an about 1.3 TeV, similar previous observations. In addition, a spectral softening 34 revealed for first time with large statistics and well controlled systematic uncertainties, overall significance 4.3σ. DAMPE measurements both protons suggest particle charge dependent energy, although...
Abstract The Forbush decrease (FD) represents the rapid of intensities charged particles accompanied with coronal mass ejections or high-speed streams from holes. It has been mainly explored ground-based neutron monitor network, which indirectly measures integrated all species cosmic rays by counting secondary neutrons produced interaction between atmospheric atoms and rays. space-based experiments can resolve but energy ranges are limited relatively small acceptances except for most...
A deep learning method for the particle trajectory reconstruction with DAMPE experiment is presented. The developed algorithms constitute first fully machine-learned track pipeline space astroparticle missions. Significant performance improvements over standard hand-engineered are demonstrated. Thanks to better accuracy, facilitate identification of absolute charge tracker in entire energy range, opening a door measurements cosmic-ray proton and helium spectra at extreme energies, towards...
The Dark Matter Particle Explorer (DAMPE) is a space-borne particle detector and cosmic ray observatory in operation since 2015, designed to probe electrons gamma rays from few GeV 10 TeV energy, as well protons nuclei up 100 TeV. Among the main scientific objectives precise measurement of electron + positron flux, which, due very large proton background orbit, requires powerful identification method. In past decade, field machine learning has provided us needed tools. This paper presents...
The DArk Matter Particle Explorer (DAMPE) is a satellite-borne experiment, in operation since 2015, aimed at studying cosmic rays and high-energy gamma rays. Proton helium are the first- second-most abundant components Given their smaller interaction cross sections with interstellar medium, compared to heavier nuclei, they can travel larger distances, thereby becoming important probes cosmic-ray sources as well acceleration propagation mechanisms. Recently, DAMPE collaboration, machine...
The DArk Matter Particle Explorer (DAMPE) is a satellite-borne detector for high-energy cosmic rays and $\gamma$-rays. To fully understand the performance obtain reliable physical results, extensive simulations of are necessary. particularly important data analysis ray nuclei, which relies closely on hadronic nuclear interactions particles in material. Widely adopted simulation softwares include GEANT4 FLUKA, both have been implemented DAMPE tool. Here we describe tool compare results proton...
The ATLAS experiment's data management system is constantly tracing file movement operations that occur on the Worldwide LHC Computing Grid (WLCG). Due to large scale of WLCG, statistical analysis traces infeasible in real-time. Factors contribute scalability problems include capability for users initiate on-demand queries, high dimensionality tracer entries combined with very low cardinality parameters, and size namespace. These issues are alleviated through adoption an incremental model...
We demonstrate a new method for the calculation of inelastic scattering cross-section, which in contrary to Regge-based methods takes into account energy momentum conservation law. By virtue this it was shown that main contribution integral expressing cross-sections comes not from multi-Regge domain. In particular leads fact accounting longitudinal momenta virtualities is sufficient and results mechanism cross-section growth. The necessity taking large number interference contributions...
The High Energy cosmic-Radiation Detection (HERD) facility has been proposed as a space astronomy payload onboard the future China's Space Station. HERD is planned for operation starting around 2027 about 10 years In addition to unprecedented sensitivity dark matter searches and cosmic-ray measurements up knee energy, it should perform gamma-ray monitoring full sky survey from few hundred si{MeV} tens of si{TeV}. We present first study performance obtained with simulations whole detector...
Cosmic ray research field has entered a brave new world of precise direct measurements in the multi-TeV energy domain thanks to success newest space-borne instruments. DAMPE is satellite astroparticle detector aimed at probing cosmic electrons and gamma rays from few GeV 10 TeV nuclei between hundred with un- precedented resolution. It was successfully launched December 2015, providing, particular, first observation break electron plus positron spectrum around 0.9 TeV. presents unique...
In this paper we deal with the problem of predicting a steady-state neutron spectrum in media arbitrary composition and geometry. The analytical calculations such are often too complex, if at all possible. We describe method Geant4-based Monte Carlo calculation medium containing fixed source. addition to spectrum, obtain snapshots evolution time, which may be thought as non-equilibrium spectra, their form is considerable interest for further studies.
We demonstrate a new technique for calculating proton-proton inelastic cross-section, which allows one by application of the Laplace' method replace integrand in integral scattering amplitude vicinity maximum point expression Gaussian type. This, turn, us to overcome computational difficulties calculation integrals expressing cross section sufficiently large numbers particles. have managed these problems cross-section production (n ≤ 8) number secondary particles within framework φ3 model....
We demonstrate a possibility of computation inelastic scattering cross-section in multi-peripheral model by application the Laplace method to multidimensional integral over domain physical process. The constrained maximum point under condition energy-momentum conservation has been found. In vicinity this integrand is substituted for an expression Gaussian type, which made possible compute numerically. paper two parts. hunting procedure considered and properties are discussed given part...