Extrapolation of the structural functions F1 and F2 for virtualities of the photon Q^2 from 2 to 7 GeV^2
Extrapolation of the structural functions F1 and F2 for virtualities of the photon Q^2 from 2 to 7 GeV^2
A. A. Golubenko
An estimation of the inclusive structural functions of the proton in the excitation energy region of nucleon resonances for virtualities of the photon Q^2 from 2 to 7 GeV^2 is performed. Extrapolation of the inclusive structural functions F1 and F2 was carried out on the basis of experimental data in the region Q^2 < 4.5 GeV^2 and data obtained from the Bosted’s fit for Q^2 > 4.5 GeV^2. This evaluation is important in the development of the CLAS12 detector program of experiments to study the structure of the ground and excited states of the nucleon, which opens access to the dynamics of strong interactions in the nonperturbative regime.
Show AbstractInteraction of high-speed particles with a solid barrier
Interaction of high-speed particles with a solid barrier
N. P. Chirskaya, I. K. Ermolaev, L. S. Novikov
The paper presents calculated and experimental data on the diameter and depth of craters formed in an aluminum target during impacts of steel balls with velocities ∼ 0.1 - 3 km/s. There is a good agreement between the two groups of data in determining the depth of the craters, but also there is significant disagreement in the diameter values. The main reason for the discrepancy is the incompleteness of the used calculation model
Show AbstractInfluence of isospin effects on the structure of light Ξ hypernucleus
Influence of isospin effects on the structure of light Ξ hypernucleus
M. S. Khirk, D. E. Lanskoy
This work is devoted to of the isospin structure and decays of Ξ hypernuclei. Since the Ξ hyperon has two charge states, the existence of Ξ hypernuclei with mixed charge of Ξ hyperons is possible. In the limit of strong mixing of charge states, pure isospin states can occur, however, generally isospin states are also mixed. The main purpose of this work is studying of charge and isospin mixing effects in p-shell Ξ hypernuclei and their implications in decay widths.
Show AbstractB-Physics Trigger of the ATLAS Experiment in Run 2
B-Physics Trigger of the ATLAS Experiment in Run 2
V. V. Sinetckii$^{1,2}$, L. N. Smirnova$^1$
During the Run 2 of the LHC the ATLAS experiment recorded about 86 fb−1 of proton-proton collision data at a center-of-mass energy of ps = 13 TeV. The trigger system of the ATLAS detector is a important component for this experiment and is necessary to reduce the data stream from about 40 MHz to 1 kHz. This article is an overview of the changes that the trigger experienced during the first long stop (LS1) in 2013 — 2014.
Show AbstractSimulation of absorbed dose distribution in objects with complex configuration
Simulation of absorbed dose distribution in objects with complex configuration
N. P. Chirskaya, L. S. Novikov, V. V. Sinolits
This paper considers the possibilities of different mathematical methods application to the problem of the absorbed dose calculation in objects with a complex configuration. The simulation results of the absorbed dose distribution in a spherical water detector placed inside a spherical shield due to protons of galactic cosmic rays with energy in the range 101 − 105 MeV are presented.
Show AbstractStudying of 14.1 MeV neutrons inelastic scattering on light nuclei
Studying of 14.1 MeV neutrons inelastic scattering on light nuclei
N. A. Fedorov$^{1,2}$, T. Yu. Tretyakova$^3$, D. N. Grozdanov$^{1,4}$, V. M. Bystritskiy$^1$, Yu. N. Kopach$^1$, I. N. Ruskov$^{1,4}$, V. R. Skoy$^1$, N. I. Zamyatin$^1$, D. .. Wang$^{1,5}$, F. A. Aliev$^{1,6}$, C. .. Hramco$^{1,7}$, A. .. Gandhi$^8$, A. .. Kumar$^8$, M. G. Sapozhnikov$^1$, Yu. N. Rogov$^1$, E. A. Razinkov$^1$, S. .. Dabylova$^1$
The characteristic gamma radiation from the interaction of 14.1 MeV neutrons with a SiO2 and H2O sample is investigated with Tagged Neutron Method (TNM). The anisotropies of gamma-ray emission of 1.779 MeV from silicon and 6.13 MeV from oxygen were measured at 11 azimuth angles with a step of ∠15◦. The present results are in good agreement with some recent experimental data.
Show AbstractA new mechanism for the action of continuous and pulsed UV-C radiation on water
A new mechanism for the action of continuous and pulsed UV-C radiation on water
I. M. Piskarev$^1$, K. A. Astaf'eva$^2$, I. P. Ivanova$^2$
The formation of hydrogen peroxide in bidistilled water under the influence of UV-C radiation from a low-pressure mercury lamp DKB-9 was studied. The yield of hydrogen peroxide was (1 ± 0.2) · 10−7 mol (ls) −1. The wavelengths of radiation are estimated, under the influence of which the formation of H2O2 is possible. It was assumed that the intermediate product of the reaction formed directly under the action of radiation is the radical HO2•/O2•−. Oxidation-reduction reactions in aqueous solutions containing F e2+, F e3+ and I− ions at pH values from 0.8 to 8.1 were studied for its identification. The quantum yield of the HO2• radicals in an acidic medium under the action of mercury lamp radiation is 0.015 ± 0.005
Show AbstractThermostimulated hinge for transformable space structures
Thermostimulated hinge for transformable space structures
P. G. Babaevskiy, N. A. Kozlov, I. G. Agapov, O. A. Nevolko
The article describes the design and testing of a thermally stimulated hinge made from polymeric composite material with shape memory effect for transformable space structures. Simulation of the hinge heating process using the ANSYS Workbench program under various environmental and heating conditions was carried out to determine the power of the heat sources and the selection of the heaters. An experimental study of the hinge heating process under ordinary conditions using built-in heaters is carried out, and the degree, time and effort of restoring it to the shape are determined. The received results testify to high working capacity of the developed thermostimulated hinge and the possibility of its use in transformable space structures.
Show AbstractModeling the production of B mesons in pp collisions at LHC energies
Modeling the production of B mesons in pp collisions at LHC energies
I. I. Ovcharov, L. N. Smirnova
The spectra of the transverse momentum for B mesons of various types in pp interactions at center-of-mass energies 7 and 13 TeV were simulated with PYTHIA 8 event generator. Spectrum ratios for B mesons of different nature and the energy dependence of these distributions in the interval 7-13 TeV were obtained. It is shown that the spectra become more hard with increase of the proton collision energy.
Show AbstractDevelopment and research of carbon plastics with shape memory effect, which have the required thermomechanical characteristics and inversion properties
Development and research of carbon plastics with shape memory effect, which have the required thermomechanical characteristics and inversion properties
A. A. Slyusarev, P. G. Babaevskiy, G. M. Reznichenko
The purpose of the study is to develop and investigate polymeric composite materials (carbon plastics) with thermally stimulated shape memory effect (TS SME) for an ultralight controlled, reversibly transforming structural member of picosatellites solar cells. Research aims on the development of a polymer matrix with TS SME and high glass transition temperature in the cured state (Tg over 140°C) and reinforced laminated carbon plastics on its basis. A polyetherurethane-epoxy (PEU-E) composition cured by diaminodiphenylmethane was developed and kinetics of its curing was investigated by the dielectric analysis method (DEA) for selecting of carbon plastics compression modes. The effect of the composition curing conditions on its Tg was studied and the reversible temperature of the TS SME development by the dynamic mechanical analysis (DMA) method of was determined. The last stage of the work was the TS SME realization studies – force and deployment angle kinetics dependence on the number of carbon fabric layers and its volume content in reinforced laminated carbon plastics specimen.
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