Search Results - "Sergeev, A. V."

Recent advances in understanding substorm dynamics by Sergeev, V. A., Angelopoulos, V., Nakamura, R.

“…Magnetospheric substorms are elemental processes of solar wind energy storage and explosive release in Earth's magnetosphere. They encompass fundamental plasma…”
Get full text

THEMIS observations of an earthward-propagating dipolarization front by Runov, A., Angelopoulos, V., Sitnov, M. I., Sergeev, V. A., Bonnell, J., McFadden, J. P., Larson, D., Glassmeier, K.-H., Auster, U.

“…We report THEMIS observations of a dipolarization front, a sharp, large‐amplitude increase in the Z‐component of the magnetic field. The front was detected in…”
Get full text

Accelerated ions ahead of earthward propagating dipolarization fronts by Zhou, X.-Z., Angelopoulos, V., Sergeev, V. A., Runov, A.

“…We report on the evolving ion distributions associated with the arrival of an earthward propagating dipolarization front in the near‐Earth magnetotail using…”
Get full text

Ionospheric Electron Density and Conductance Changes in the Auroral Zone During Substorms by Stepanov, N. A., Sergeev, V. A., Shukhtina, M. A., Ogawa, Y., Chu, X., Rogov, D. D.

“…Enhanced precipitation of magnetospheric energetic electrons during substorms increases ionospheric electron density and conductance. Such enhancements, which…”
Get full text

First Results from the THEMIS Mission by Angelopoulos, V., Sibeck, D., Carlson, C. W., McFadden, J. P., Larson, D., Lin, R. P., Bonnell, J. W., Mozer, F. S., Ergun, R., Cully, C., Glassmeier, K. H., Auster, U., Roux, A., LeContel, O., Frey, S., Phan, T., Mende, S., Frey, H., Donovan, E., Russell, C. T., Strangeway, R., Liu, J., Mann, I., Rae, J., Raeder, J., Li, X., Liu, W., Singer, H. J., Sergeev, V. A., Apatenkov, S., Parks, G., Fillingim, M., Sigwarth, J.

“…THEMIS was launched on February 17, 2007 to determine the trigger and large-scale evolution of substorms. During the first seven months of the mission the five…”
Get full text

Two-Section Model of the Current Distribution in Strip Layouts of Bipolar and Hetero-Bipolar Microwave Transistors by Sergeev, V. A., Khodakov, A. M.

“…An approximate analytical expression for the density of the emitter current under the emitter metallization path in strip layouts of bipolar and hetero-bipolar…”
Get full text

Thin Current Sheet Behind the Dipolarization Front by Nakamura, R., Baumjohann, W., Nakamura, T. K. M., Panov, E. V., Schmid, D., Varsani, A., Apatenkov, S., Sergeev, V. A., Birn, J., Nagai, T., Gabrielse, C., André, M., Burch, J. L., Carr, C., Dandouras, I. S., Escoubet, C. P., Fazakerley, A. N., Giles, B. L., Le Contel, O., Russell, C. T., Torbert, R. B.

“…We report a unique conjugate observation of fast flows and associated current sheet disturbances in the near‐Earth magnetotail by MMS (Magnetospheric…”
Get full text

Testing a two-loop pattern of the substorm current wedge (SCW2L) by Sergeev, V. A., Nikolaev, A. V., Tsyganenko, N. A., Angelopoulos, V., Runov, A. V., Singer, H. J., Yang, J.

“…Recent quantitative testing of the classical (region 1 sense) substorm current wedge (SCI) model revealed systematic discrepancies between the observed and…”
Get full text

Asymmetric magnetospheric compressions and expansions in response to impact of inclined interplanetary shock by Samsonov, A. A., Sergeev, V. A., Kuznetsova, M. M., Sibeck, D. G.

“…We use global MHD simulations to model the magnetospheric response to an inclined shock that first strikes the duskside magnetosphere. The simulations predict…”
Get full text

Energetic particle injections to geostationary orbit: Relationship to flow bursts and magnetospheric state by Sergeev, V. A., Chernyaev, I. A., Dubyagin, S. V., Miyashita, Y., Angelopoulos, V., Boakes, P. D., Nakamura, R., Henderson, M. G.

“…To address the mechanism and factors controlling the injection of energetic particles to the geostationary orbit (GEO), we analyzed the appearance of…”
Get full text

On the nature of precursor flows upstream of advancing dipolarization fronts by Zhou, X.-Z., Angelopoulos, V., Sergeev, V. A., Runov, A.

“…Earthward propagating dipolarization fronts, interpreted as thin, vertical current sheets that separate plasmas of different origins in the Earth's…”
Get full text

Local structure of the magnetotail current sheet: 2001 Cluster observations by Runov, A., Sergeev, V. A., Nakamura, R., Baumjohann, W., Apatenkov, S., Asano, Y., Takada, T., Volwerk, M., Vörös, Z., Zhang, T. L., Sauvaud, J.-A., Rème, H., Balogh, A.

“…Thirty rapid crossings of the magnetotail current sheet by the Cluster spacecraft during July-October 2001 at a geocentric distance of 19 RE are examined in…”
Get full text

A missing variable in solar wind-magnetosphere-ionosphere coupling studies by Sergeev, V. A., Sormakov, D. A., Angelopoulos, V.

“…The auroral electrojet (AL) index is commonly used to characterize the magnetospheric activity. The ground magnetic perturbations that comprise AL are formed…”
Get full text

On the Method of Acoustoelectric Transformation Based on Electrokinetic Phenomena by Sharfarets, B. P., Dmitriev, S. P., Kurochkin, V. E., Sergeev, V. A.

“…A mathematical model of operation of an acoustoelectric converter, based on the electrokinetic phenomenon of flow potential, is proposed. It is shown…”
Get full text

Diamagnetic oscillations ahead of stopped dipolarization fronts by Runov, A., Sergeev, V. A., Angelopoulos, V., Glassmeier, K.-H., Singer, H. J.

“…It is well established that fast flows in the magnetotail plasma sheet which are separated from the ambient plasma by dipolarization fronts brake in the…”
Get full text

Adaptive Algorithms for Measuring the Parameters of Low-Frequency Noise of Semiconductor Devices Under the Conditions of Mass Control by Sergeev, V. A., Rezchikov, S. E.

“…We solve the problem of increasing the reliability and efficiency of quality control for semiconductor devices and present the analysis of the conditions of…”
Get full text

Observations of kinetic ballooning/interchange instability signatures in the magnetotail by Panov, E. V., Sergeev, V. A., Pritchett, P. L., Coroniti, F. V., Nakamura, R., Baumjohann, W., Angelopoulos, V., Auster, H. U., McFadden, J. P.

“…Stimulated by a recent study of a kinetic ballooning/interchange instability by Pritchett and Coroniti (2010), we present THEMIS events that confirm the…”
Get full text

Ionospheric response to oscillatory flow braking in the magnetotail by Panov, E. V., Baumjohann, W., Nakamura, R., Amm, O., Kubyshkina, M. V., Glassmeier, K.-H., Weygand, J. M., Angelopoulos, V., Petrukovich, A. A.,  Sergeev, V. A.

“…We study the ionospheric response to oscillatory braking of bursty bulk flow observed by THEMIS on 17 March 2008 between 10:22 and 10:36 UT. By calculating…”
Get full text

A Method for Measuring the Internal Quantum Efficiency of InGaN LED Emission by Frolov, I. V., Sergeev, V. A., Radaev, O. A.

“…A method of measuring the internal quantum efficiency of emission from InGaN LEDs is suggested. It consists in measuring the emission power and…”
Get full text

Energy–latitude dispersion patterns near the isotropy boundaries of energetic protons by Sergeev, V. A., Chernyaeva, S. A., Apatenkov, S. V., Ganushkina, N. Y., Dubyagin, S. V.

“…Non-adiabatic motion of plasma sheet protons causes pitch-angle scattering and isotropic precipitation to the ionosphere, which forms the proton auroral oval…”
Get full text