50 Result(s)

Article

Experimental study of the motion and shape of a vapor bubble rising in an annular channel at subatmospheric pressure

Experimental study was performed for the dynamics of vapor bubble rising in the annular channel at subatmospheric pressure. The gas bubble is formed during boiling of superheated degassed liquid in an annular ...

R. A. Dekhtyar, V. V. Ovchinnikov in Thermophysics and Aeromechanics (2023)

Article

On the Construction of a Set of Fundamental Physical Constants of Unit and Zero Dimensions

A method for obtaining an exhaustive set of multiplicative equations of relationship between the elements of an arbitrary set of the tested physical constants C_j in the form of their products in integer powers m_j

V. V. Ovchinnikov in Russian Physics Journal (2023)

Article

Regression Dependences of Mechanical Properties of Aluminum Alloys Exposed to Accelerated Argon Ion Beams

The paper focuses on the data related to the nature of changes in mechanical properties of 1–3 mm thick coldworked sheets made of commercial AMg6 (Al–Mg), VD1 (Al–Cu–Mg–Mn), 1441 (Al–Li–Cu–Mg) alloys, dependin...

V. V. Ovchinnikov, N. V. Gushchina, S. M. Mozharovsky in Russian Physics Journal (2023)

Article

The Effect of Ion Irradiation (Аr⁺, E = 15−20 keV) on the Microstructure of the Deformed Ni – 13.9 wt.% W Alloy

Using X-ray diffraction analysis, the effect of Ar⁺ ions with an energy of 15−20 keV (at ion current densities of 100−300 μA/cm²) on the microstructure, the level of internal microstresses and the texture of cold...

N. V. Guschina, V. I. Voronin, N. V. Proskurnina… in Russian Physics Journal (2022)

Article

Analysis of the shape of a capillary liquid bridge in a gap between large diameter spheres

The results of experimental studies on the properties of a capillary liquid bridge in the gap between two glass spheres of an equal diameter are presented. It is shown that for the case when the diameter of th...

B. V. Perepelitsa, E. Yu. Sukhorukova, V. V. Ovchinnikov in Thermophysics and Aeromechanics (2021)

Article

On the Assessment of Radiation Resistance of Materials in Imitation Experiments

The theoretical and experimental data determining the similarities and differences between the defect formation processes under the conditions of neutron and imitation ion irradiation are analyzed. The analysi...

V. V. Ovchinnikov in Russian Physics Journal (2021)

Article

Investigation of the Influence of Elastic Dissipative Parameters of the Under Wing Pylon-Mounted Engine Suspension on Aeroelastic and Strength Characteristics of the Aircraft

To study the influence and selection of rational elastic-dissipative parameters for under wing pylon-mounted engine suspension, a mathematical model of aeroelasticity of a large-sized transport aircraft has be...

V. V. Ovchinnikov, Yu. V. Petrov in Mechanics of Solids (2021)

Article

Investigation of transient regimes with steam absorption by water solution of lithium bromide

Transient processes are experimentally investigated at the initial stage of heat and mass transfer with steam absorption on the surface of 57.8 % water solution of lithium bromide in a bath with a diameter of ...

N. S. Bufetov, R. A. Dekhtyar, V. V. Ovchinnikov in Thermophysics and Aeromechanics (2021)

Article

On Independence of the Thermal-Spike Temperature in Pure Metals of the Implanted Ion Energy and Atomic Mass

The optical emission spectra of pure metals Fe, Zr, Ta and W are measured during their irradiation with Ar⁺, Kr⁺ and Xe⁺ ions (5, 10, 15 and 20 keV). It is found out that the energy and ion type in this energy ra...

V. V. Ovchinnikov, K. V. Shalomov, E. V. Makarov… in Russian Physics Journal (2020)

Article

A Cherenkov Water Calorimeter Based on Quasi-Spherical Modules

A description of the detection and data-acquisition systems of the Cherenkov water calorimeter of the NEVOD Experimental Complex, which is a unique scientific facility located on the Earth’s surface, is presen...

V. V. Kindin, M. B. Amelchakov, N. S. Barbashina… in Instruments and Experimental Techniques (2018)

Article

The Effect of Ion Irradiation on Nanocrystallization and Surface Relief of a Ribbon from Fe_72.5Cu₁Nb₂Mo_1.5Si₁₄B₉ Alloy

Using the methods of X-ray diffraction and atomic force microscopy, the process of crystallization of an amorphous Fe_72.5Cu₁Nb₂Mo_1.5Si₁₄B₉ alloy irradiated with accelerated Ar⁺ ions is investigated. It is found o...

I. Yu. Romanov, N. V. Gushchina, V. V. Ovchinnikov… in Russian Physics Journal (2018)

Article

The application of multi-wire drift chambers in cosmic ray research

Multiwire drift chambers designed for the neutrino experiment at the IHEP U-70 accelerator have found a new application in the MEPhI experiment focused on the detection of ultrahigh-energy cosmic rays. Their h...

E. A. Zadeba, N. S. Barbashina, A. A. Borisov… in Physics of Particles and Nuclei (2018)

Article

Dynamics of explosive boiling and third heat transfer crisis at subcooling on a vertical surface

Results of experimental studies on dynamics of explosive boiling and third heat transfer crisis under the conditions of liquid subcooling are presented for the vertical arrangement of the heat-transfer surface...

B. P. Avksentyuk, V. V. Ovchinnikov in Thermophysics and Aeromechanics (2017)

Article

The central part of the NEVOD-EAS installation: First results

The NEVOD-EAS array is now being installed at MEPhI to determine the sizes, directions of arrival, and positions of the axes of extensive air showers (EAS), different components of which are recorded by the de...

I. A. Shulzhenko, M. B. Amelchakov… in Bulletin of the Russian Academy of Science… (2017)

Article

The URAN array for studying atmospheric neutrons

The URAN array is designed to study primary cosmic rays in the region of the knee by detecting neutrons produced as a result of interaction between EAS particles and nuclei in the atmosphere or matter near the...

D. M. Gromushkin, I. I. Astapov… in Bulletin of the Russian Academy of Science… (2017)

Article

Structural Changes in Alloys of the Al–Cu–Mg System Under Ion Bombardment and Shock-Wave Loading

To confirm the hypothesis on the shock-wave nature of long-range effects upon corpuscular irradiation of condensed media presumably caused by emission and propagation of post-cascade shock waves, comparative e...

V. V. Ovchinnikov, N. V. Gushchina, I. Yu. Romanov… in Russian Physics Journal (2017)

Article

Experimental investigation of nonisothermal gas flows in short channels

S. L. Elistratov, E. Yu. Slesareva… in Journal of Engineering Thermophysics (2015)

Article

A coordinate-tracking setup based on drift chambers for investigating ultrahigh energy cosmic rays

A large-scale coordinate-tracking setup for registering the near-horizontal muon flux from ultrahigh energy cosmic rays is under development at the MEPhI. The setup is based on drift chambers from the neutrino...

E. A. Zadeba, N. V. Ampilogov… in Bulletin of the Russian Academy of Science… (2015)

Article

Status of the NEVOD-EAS experiment

The NEVOD-EAS setup is designed for independent estimation of the EAS parameters recorded in the NEVOD-DECOR experiment in the region of the energy spectrum knee. The setup’s recording system is based on the c...

I. A. Shulzhenko, M. B. Amelchakov… in Bulletin of the Russian Academy of Science… (2015)

Article

Investigating the relationship between the NEVOD Cherenkov water detector’s response and water transparency

Results from studying the amplitude response of PMTs and estimating the probability of correctly determining the direction of a particle track using quasispherical modules for different water transparencies an...

V. V. Kindin, N. S. Barbashina… in Bulletin of the Russian Academy of Science… (2015)