V. Petrov - Academia.edu (original) (raw)

Papers by V. Petrov

Springer Proceedings in Earth and Environmental Sciences, 2022

Abstract. The creation of the charged particles registration system for the Radioscaf mission is ... more Abstract. The creation of the charged particles registration system for the Radioscaf mission is described in this paper. This system is a part of the RAZREZ equipment. The detectors measuring fluxes of charged particles, are located in blocks R-B (protons with energies> 50 MeV and ≈ 5 MeV electrons, and Gamma-ray emission of 50 keV to 3 MeV) and R-DB2 (electrons of ≈ 100 keV to 3 MeV). The equipment will be placed in the used spacesuit and launched from International Space Station towards the Earth. The estimated lifetime of the Radioscaf mission is about 6 months, it will operate at altitudes from 350 to ≈ 180 km. As a result of the experiment we plan to obtain the data of the charged and neutral particles fluxes in a wide altitudinal range and remote from the massive space objects.

Space Science Reviews, 2017

The payload of the UFFO (Ultra-Fast Flash Observatory)-pathfinder now onboard the Lomonosov space... more The payload of the UFFO (Ultra-Fast Flash Observatory)-pathfinder now onboard the Lomonosov spacecraft (hereafter UFFO/Lomonosov) is a dedicated instrument for the observation of GRBs. Its primary aim is to capture the rise phase of the optical light curve, one of the least known aspects of GRBs. Fast response measurements of the optical emission of GRB will be made by a Slewing Mirror Telescope (SMT), a key instrument of the payload, which will open a new frontier in transient studies by probing the early optical rise of GRBs with a response time in seconds for the first time. The SMT employs a rapidly slewing The Lomonosov Mission Edited by Yuri Shprits, Hans Bloemen and Jim Burch B S. Jeong

PROTECTION OF MATERIALS AND STRUCTURES FROM THE SPACE ENVIRONMENT

ABSTRACT

Moscow University Physics Bulletin, 2021

The prospects of composite materials based on polymer matrices with the inclusion of carbon nanot... more The prospects of composite materials based on polymer matrices with the inclusion of carbon nanotubes, including oriented carbon nanotubes, as both functional and structural materials for nanosatellites are considered. The thermal conductivity and electrical conductivity of the composites has been measured. Techniques for producing carbon nanotubes, including vertically oriented nanotubes synthesized on filaments, and coaxial regular nanomesostructures as a functional additive for varying the properties of materials are proposed.

The creation of the charged particles registration system for the Radioscaf mission is described ... more The creation of the charged particles registration system for the Radioscaf mission is described in this paper. This system is a part of the RAZREZ equipment. The detectors measuring fluxes of charged particles, are located in blocks R-B (protons with energies > 50 MeV and ≈ 5 MeV electrons, and Gamma-ray emission of 50 keV to 3 MeV) and R-DB2 (electrons of ≈ 100 keV to 3 MeV). The equipment will be placed in the used spacesuit and launched from International Space Station towards the Earth. The estimated lifetime of the Radioscaf mission is about 6 months, it will operate at altitudes from 350 to ≈ 180 km. As a result of the experiment we plan to obtain the data of the charged and neutral particles fluxes in a wide altitudinal range and remote from the massive space objects.

Space Debris: Fundamental and Practical Aspects of the Threat, 2019

Cosmic Research, 2020

Tracking Ultraviolet Setup (TUS) detector is a detector of ultraviolet (UV) radiation of the atmo... more Tracking Ultraviolet Setup (TUS) detector is a detector of ultraviolet (UV) radiation of the atmosphere in the wavelength range of 300–400 nm (near-ultraviolet) with high sensitivity (tens of photons emitted within the solid angle of 10–4 sr in 0.8 μs), which operated for a year and a half aboard the Lomonosov satellite. The TUS telescope had a multipurpose operational program, which made it possible to detect UV flashes from the shortest ones created by extensive air showers generated by cosmic rays to long ones, up to 1 s, created by meteors. Among these various phenomena, most often are flashes from lightning strikes, both directly creating a glow and causing the development of secondary discharges in the atmosphere, in the upper atmosphere and in the ionosphere. These discharges differ in both nature and phenomenology—in particular, they have different durations and luminosities.

VESTNIK of Samara University. Aerospace and Mechanical Engineering, 2019

The natural and “man-made” space environment generates serious risks for the implementation of sp... more The natural and “man-made” space environment generates serious risks for the implementation of space missions, both automatic and human. The main natural and technogenic risk factors that limit or pose a threat to the implementation of space-based automatic and manned space missions in the near-Earth space are cosmic radiation and space debris. In the upper layers of the atmosphere, natural transient electromagnetic phenomena associated with significant energy release are also risk factors for suborbital flights. It is planned to create a system of spacecraft in the proposed “Universat-SOCRAT” project that makes it possible, in a mode close to real-time, to determine the radiation conditions in a significant part of the area of trapped radiation, up to the orbits of global navigation satellite systems or the geostationary orbit. It is also planned to create a space segment of monitoring space debris and electromagnetic transients in the upper atmosphere. Monitoring of space debris w...

Cosmic Research, 2017

⎯The work is devoted to observations of sharp growths of magnetospheric electron fluxes in the vi... more ⎯The work is devoted to observations of sharp growths of magnetospheric electron fluxes in the vicinity of the polar boundary of the outer radiation belt of the Earth according to the data of measurements on the Vernov and Lomonosov satellites. This precipitation was observed at the high-latitude boundary of the outer radiation belt toward the equator from the isotropization boundary, and can be caused by scattering waves of various physical natures, including electromagnetic and electrostatic waves.

Proceedings of Swift: 10 Years of Discovery — PoS(SWIFT 10), 2015

Testing and Performance of UFFO Burst Alert & Trigger Telescope JakubŘípa Figure 1: Left: A photo... more Testing and Performance of UFFO Burst Alert & Trigger Telescope JakubŘípa Figure 1: Left: A photo shows the assembled UFFO-p with its two scientific instruments: UBAT and SMT. Right: A schematic view of UBAT is drawn. It consists of a coded mask, hopper, detector and readout electronics.

Astronomy Reports, 2018

The results of observations with the MASTER-SHOK robotic wide-field optical cameras onboard the L... more The results of observations with the MASTER-SHOK robotic wide-field optical cameras onboard the Lomonosov Space Observatory carried out in 2016 are presented. In all, the automated transient detection system transmitted 22 181 images of moving objects with signal-to-noise ratios greater than 5 to the Earth. Approximately 84% of these images are identified with well-known artificial Earth satellites (including repeated images of the same satellite) and fragments of such satellites (space debris), according to databases of known satellites. The remaining 16% of the images are relate to uncatalogued objects. This first experience in optical space-based monitoring of near-Earth space demonstrates the high e ciency and great ffi potential of using large-aperture cameras in space, based on the software and technology of the MASTER robotic optical complexes (the Mobile Astronomical System of TElescope-Robots (MASTER) global network of robotic telescopes of Lomonosov Moscow State University).

Physics of Particles and Nuclei, 2018

⎯The scientific instruments onboard the Lomonosov satellite include a complete set of detectors d... more ⎯The scientific instruments onboard the Lomonosov satellite include a complete set of detectors designed to study the gamma and optical emission of cosmic gamma-ray bursts (GRBs). The BDRG gamma spectrometer ensures producing a trigger of a GRB and studying GRB properties in the energy range of 10-3000 keV as well as determining the GRB source coordinates by comparing readings of three differently directed detectors. The SHOK optical cameras (with a field of view of ~20 × 40 degrees) fix a set of images by the GRB trigger preceding the trigger and a post-trigger set at a frequency of about five frames per second. The UFFO instrument incorporates the UBAT telescope with a coding mask for measurements within a range of hard X rays and soft gamma rays and the SMT optical slewing mirror telescope, which can be directed at the GRB source in about 1 s to measure the GRB optical emission at early stages.

Journal of Applied Spectroscopy, 1991

This same regularity is observed in the solution compositions we studied (Table 2). At high conce... more This same regularity is observed in the solution compositions we studied (Table 2). At high concentrations of LiCI in the solutions (20-30 wt. %) a decline in the quantum yields of fluorescence of the dyes to values of 0.1-0.7 was fixed. The effect of fluorescence quenching of coumarins in the presence of LiCI is observed on different compounds and differs only quantitatively. Summarizing the data given, it can be concluded that as a result of the investigations compositions of a new class of electrolytes based on water solutions of LiCl-containing coumarin dyes, optimum in luminescent properties, were determined. These liquid systems differ in the comparatively high quantum yields of luminescence and fluorescence in a wide spectral range from 450 to 600 nm. Moreover, the experimental dependence of a number of luminescent characteristics on the composition of these electrolytes was established.

Journal of Applied Spectroscopy, 1982

High resolution spectra of zinc porphin and magnesium porphin in a n-octane matrix at 4.2~ Effect... more High resolution spectra of zinc porphin and magnesium porphin in a n-octane matrix at 4.2~ Effect of the addition of ethanol and other solvents,,, Spectrochim. Acta, 32A, No. 4, 747-753 (]976). 7.

Cosmic Research, 2007

ISSN 0010-9525, Cosmic Research, 2007, Vol. 45, No. 4, pp. 273286. © Pleiades Publishing, Ltd., ... more ISSN 0010-9525, Cosmic Research, 2007, Vol. 45, No. 4, pp. 273286. © Pleiades Publishing, Ltd., 2007. Original Russian Text © VA Sadovnichy, MI Panasyuk, S.Yu. Bobrovnikov, NN Vedenkin, NA Vlasova, GK Garipov, OR Grigorian, TA Ivanova, VV ...

journalofcosmology.com

... SI Svertilov, NN Veden'kin, and IV Yashin DV Skobeltsyn Institute of Nuclear Physics of ... more ... SI Svertilov, NN Veden'kin, and IV Yashin DV Skobeltsyn Institute of Nuclear Physics of MV Lomonosov Moscow State University, Leninskie Gory, 1, str. ... pavel.klimov@gmail.com, bkhrenov@yandex.ru, morozenko_viola@mail.ru, vas@srd.sinp.msu.ru, ...

Cosmic Research, 2016

The program of physical studies on the Vernov satellite launched on July 8, 2014 into a polar (64... more The program of physical studies on the Vernov satellite launched on July 8, 2014 into a polar (640 × 830 km) solar-synchronous orbit with an inclination of 98.4° is presented. We described the complex of scientific equipment on this satellite in detail, including multidirectional gamma-ray detectors, electron spectrometers, red and ultra-violet detectors, and wave probes. The experiment on the Vernov satellite is mainly aimed at a comprehensive study of the processes of generation of transient phenomena in the optical and gamma-ray ranges in the Earth’s atmosphere (such as high-altitude breakdown on runaway relativistic electrons), the study of the action on the atmosphere of electrons precipitated from the radiation belts, and low- and high-frequency electromagnetic waves of both space and atmospheric origin.

Universe

This paper presents a catalogue of gamma-ray bursts (GRBs) that were detected by the instruments ... more This paper presents a catalogue of gamma-ray bursts (GRBs) that were detected by the instruments onboard the Lomonosov space observatory. The Lomonosov mission gave the first experience of not only multi-wavelength (from optical to gamma) observations of GRBs but also multi-messenger observations of extreme phenomena and GRBs. The detailed light curves and energy spectra of the detected GRBs are presented. The results of the prompt, early an afterglow optical observations of several GRBs are discussed.

Moscow University Physics Bulletin