Skip to main content

79 Result(s)

within V. P. Ivanov Remove this filter Physics Remove this filter

previous disabled Page of 4
and

  1. No Access

    Article

    Radio Emission Spectrum of Supernova Remnant G74.9+1.2

    Measurements of the flux densities of the supernova remnant (SNR) G74.9+1.2 (CTB 87) at frequencies of 4840 and 8450 MHz were carried out with the RT-32 radio telescope of the Svetloye observatory of the Insti...

    V. P. Ivanov, A. V. Ipatov, I. A. Rahimov, T. S. Andreeva in Astronomy Reports (2023)

  2. No Access

    Article

    Radio Emission Variability of Supernova Remnants and a Possible Explanation of the Phenomenon

    The flux densities and current spectra of plerions and combined supernova remnants (SNRs): 3C58, 3C144, G11.2–0.3, G21.5–0.9, and 3C396 are determined on an artificial moon (AM) flux scale. The radio emission ...

    V. P. Ivanov, A. V. Ipatov, I. A. Rakhimov, T. S. Andreeva in Astronomy Reports (2022)

  3. Article

    Open Access

    Variability of the Spectrum of the Young Supernova Remnant G11.2-0.3

    The spectrum of G11.2-0.3 has been refined by bringing the published intensity measurements to the “artificial moon” flux scale, and the dynamics of its changes on different time scales from 0.4 to more than ~...

    V. P. Ivanov, A. V. Ipatov, I. A. Rahimov, T. S. Andreeva in Astronomy Reports (2021)

    Download PDF (854 KB) View Article

  4. No Access

    Article

    Radio Emission of the Combined Supernova Remnant 3C396 (G39.2-0.3)

    Using the RT-32 radio telescope of the “Svetloe” IAA RAS observatory in 2017–2018, the flux density measurements of the combined (composite) supernova remnant (SNR) 3С396 (G39.2-0.3) at frequencies of 4840 and...

    V. P. Ivanov, A. V. Ipatov, I. A. Rakhimov, T. S. Andreeva in Astronomy Reports (2020)

  5. No Access

    Article

    Spectrum and Variability of the Supernova Remnant G21.5-0.9

    Measurements of the flux densities of the supernova remnant G21.5-0.9 at 4840 and 8450 MHz were performed in 2013–2018 on the 32-m telescope of the Svetloe Observatory of the Institute of Applied Astronomy, Ru...

    V. P. Ivanov, A. V. Ipatov, I. A. Rakhimov, S. A. Grenkov… in Astronomy Reports (2019)

  6. No Access

    Article

    Spectrum Anomaly of the Supernova Remnant 3C58

    We measured the instantaneous spectra of the supernova remnant 3C58 for the epochs: 2003.4, 2004.4, and 2013.2 with the RTF-32 radio telescope of the “Svetloe” IAA RAS observatory at four frequencies from 1550...

    V. P. Ivanov, A. V. Ipatov, I. A. Rakhimov, T. S. Andreeva in Astrophysical Bulletin (2019)

  7. No Access

    Article

    Spectra of Standard Radio Sources at the Current Epoch

    The results of observations aimed at determining the spectra of standard radio sources in an “artificial-Moon” absolute flux scale at epoch 2015.5 at wavelengths of 3.5–18 cm are presented. The sample includes...

    V. P. Ivanov, A. V. Ipatov, I. A. Rakhimov, S. A. Grenkov… in Astronomy Reports (2018)

  8. No Access

    Article

    A high-voltage high-current switch on the basis of triggered vacuum switches

    A KV-25-300 high-voltage switch for dc voltages of up to 25 kV and currents of up to 300 kА for pulse powering of loads at a pulse rise rate of up to 10 kA/μs was developed and tested. The switch consists of t...

    M. R. Akhmetgareev, V. P. Ivanov, L. P. Menakhin… in Instruments and Experimental Techniques (2016)

  9. No Access

    Article

    A device for protection against pulse overvoltages based on a triggered vacuum spark gap

    The scheme of an automatic protection device on the basis of a controlled vacuum spark gap with an operation time of <1 μs is proposed. The results of studying the start-up and switching characteristics of thi...

    D. F. Alferov, D. V. Evsin, V. P. Ivanov… in Instruments and Experimental Techniques (2011)

  10. No Access

    Article

    Quenching of an electric arc in a vacuum gap with a uniform transverse magnetic field

    The breaking ability of a vacuum arc interrupter with a uniform transverse magnetic field formed by a system of permanent magnets was investigated experimentally. The vacuum interrupter with a 0.5-μF shunting ...

    D. F. Alferov, M. R. Ahmetgareev, D. V. Yevsin, V. P. Ivanov in Plasma Physics Reports (2010)

  11. No Access

    Article

    Raising the interrupting capacity of vacuum gap with transverse magnetic field by means of shunting resistor

    The possibility is investigated of raising the interrupting capacity of a vacuum gap with constant axisymmetric magnetic field by means of a shunting resistor with a resistance of 0.5–2 Ohm. The investigations...

    D. F. Alferov, D. V. Evsin, V. P. Ivanov in High Temperature (2009)

  12. No Access

    Article

    A study into statistical regularities of extinction of a DC electric arc in an axisymmetric magnetic field

    A statistical investigation is performed of the extinction of a 30–350 A electric arc in a vacuum gap, in which permanent magnets are used to generate an axisymmetric magnetic field with different ratios betwe...

    D. F. Alferov, V. P. Ivanov, D. V. Evsin, V. A. Sidorov in High Temperature (2008)

  13. No Access

    Article

    The effect of the diffraction field on the process of active suppression of sound fields

    The mechanism of the active suppression of a sound field is studied as an interference-diffraction process of interaction between the external field and suppressing field produced by auxiliary radiators. An ex...

    V. P. Ivanov in Acoustical Physics (2007)

  14. No Access

    Article

    Analysis of the field diffracted by a cylinder with a perforated coating

    The direct and inverse problems of plane wave diffraction by a circular cylinder with a perforated coating are investigated. In the context of the direct problem, it is shown that a coated cylinder causes a mo...

    V. P. Ivanov in Acoustical Physics (2006)

  15. No Access

    Article

    DC vacuum arc in a nonuniform axisymmetric magnetic field

    An experimental investigation is performed of the characteristics of DC vacuum arc during the opening of contacts in an axisymmetric magnetic field with different ratios between the axial and radial components...

    D. F. Alferov, V. P. Ivanov, V. A. Sidorov in High Temperature (2006)

  16. No Access

    Article

    The Comprehensive Upgrading of an MИ-1201 Mass Spectrometer

    The set of operations used to upgrade an MИ-1201 magnetic sector mass spectrometer is described. The upgrading consisted of automating the recording system, develo** the software, and modifying the vacuum sy...

    V. P. Ivanov, T. G. Moiseeva, A. S. Trofimov… in Instruments and Experimental Techniques (2005)

  17. No Access

    Article

    The Initial Equations and the Equations for Measuring the Mass and Volume Flow Rates of a Gas

    A mathematical model of the flow of a gas in Laval nozzles is analyzed. The model is used to obtain equations for measuring the mass and volume flow rates of a gas.

    A. P. Gerasimov, V. P. Ivanov, V. M. Krasavin, V. M. Lakhov… in Measurement Techniques (2005)

  18. No Access

    Article

    The Area of Application of Laval Nozzles in Flow-Rate Measurement Technique

    Using examples of their use in standard and working instruments for measuring mass flow rate and a variety of gas volume flow rates, it is shown that critical nozzles and, particularly the Laval nozzle, can oc...

    A. P. Gerasimov, V. P. Ivanov, V. M. Krasavin, V. M. Lakhov… in Measurement Techniques (2005)

  19. No Access

    Article

    The Properties of Gas Flows for Different Flow Conditions Through Laval Nozzles

    For all possible types of gas flow through a Laval nozzle, a group of “operating” conditions are distinguished with particular properties characteristic for these conditions, which open up the possibility of e...

    A. P. Gerasimov, V. P. Ivanov, V. M. Krasavin, V. M. Lakhov… in Measurement Techniques (2005)

  20. No Access

    Article

    Relationship between the nonstationary radio-luminosity variations of the Crab Nebula and the activity of its pulsar

    Based on the half-century-long history of radio observations of the Crab Nebula, we investigate the evolution of its radio luminosity. We found a secular decrease in the radio luminosity; it has decreased by 9...

    K. S. Stankevich, V. P. Ivanov in Astronomy Letters (2005)

previous disabled Page of 4