A5060009582- Ionosphere and magnetosphere dynamics
- Lightning and Electromagnetic Phenomena
- Fluid Dynamics and Turbulent Flows
- Solar and Space Plasma Dynamics
- Geomagnetism and Paleomagnetism Studies
- Earthquake Detection and Analysis
- Dark Matter and Cosmic Phenomena
- Particle Dynamics in Fluid Flows
- Astrophysics and Cosmic Phenomena
- Magnetic confinement fusion research
- High voltage insulation and dielectric phenomena
- Cosmology and Gravitation Theories
- Wind and Air Flow Studies
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Electromagnetic Compatibility and Noise Suppression
- Theoretical and Computational Physics
- Advanced Thermodynamics and Statistical Mechanics
- Electrostatic Discharge in Electronics
- Statistical Mechanics and Entropy
- Complex Systems and Time Series Analysis
- Pulsars and Gravitational Waves Research
- Meteorological Phenomena and Simulations
- Gas Dynamics and Kinetic Theory
- Stochastic processes and statistical mechanics
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2015-2024
National Research University Higher School of Economics
2014-2024
Russian Academy of Sciences
1995-2010
Los Alamos National Laboratory
1999
Max Planck Institute for Astronomy
1995-1997
Max Planck Society
1995-1996
The observed electric fields in thunderclouds are generally too weak to initiate the atmosphere’s electrical breakdown. But cosmic rays can play a surprising role drama of lightning.
We report here for the first time about registration of an extraordinary high flux low-energy neutrons generated during thunderstorms. The measured neutron count rate enhancements are directly connected with thunderstorm discharges. value obtained in our work is a challenge photonuclear channel generation thunderstorm: estimated needed high-energy $\ensuremath{\gamma}$-ray 3 orders magnitude higher than that one observed.
A nonlinear theory determining the conditions of existence and structure stationary striations generated in ionospheric modifications by powerful radio waves is proposed. The density depletions its characteristic length, width, depth are shown to be agreement with observations. strong enhancement electron temperature inside predicted.
An analytical theory is developed of the nonlinear stage Jeans instability in a cold nondissipative gas an expanding Universe. It shown that growth this creates giant dark-matter halo, 200 kpc size, around galaxies. This halo has density singularity described by ? r-?, where 1.7?1.9. A comparison made analytic with results numerical simulations and good agreement between them demonstrated. Analytic dynamic solutions are used to develop statistical method for calculation correlation functions...
The generation of an avalanche runaway electrons is demonstrated for the first time in a laboratory experiment. Two flows are formed sequentially extended air discharge gap at stage delay pulsed breakdown. first, picosecond, electron flow emitted cathode region where field enhanced. Being accelerated gap, this beam generates due to impact ionization. These secondary form delayed if strong enough. properties correspond existing notions about breakdown air. measured current exceeds up order...
Strong large‐scale oscillations of the electric field and plasma density observed on rockets in lower part ionospheric E layer scattering low‐frequency radar waves (ƒ ≤ 10 MHz) same region ionosphere are not well explained by existing theories. We explore here a new mechanism excitation turbulence region, connected with turbulent motion neutral atmosphere. The problem is solved fluid approximation. spectrum induced fluctuations electron ion densities determined analyzed. cross section for...
Energetic radiation during thunderstorms is studied. The possibility to identify the high-energy lightning emission in 10 s monitoring mode demonstrated. Simultaneous measurements of gamma-ray emission, electrons, and neutron triggering are fulfilled. Energy spectra gamma electrons obtained. intensity both rays discharge prevail background by 1.5 2 orders magnitude.
A set of exact integrals motion is found for systems driven by homogenous isotropic stochastic flow. The describe the evolution (hyper-)surfaces different dimensions transported flow and can be expressed in terms local surface densities. expression universal: it represents general geometric properties does not depend on statistics specific
It has been revealed using microlensing that a considerable part, possibly more than half, of the dark matter in halo our Galaxy consists objects with mass spectrum ranging from 0.05 to 0.8 solar mass. What is nature these objects? There exist two hypotheses. According one, are Jupiter type planets or small stars (brown and white dwarfs) consisting normal baryonic matter. other, non-compact objects, i.e., small-scale formations non-baryonic Here, theory proposed describing possibility...