Mikhail Zelenyi - Academia.edu (original) (raw)
Papers by Mikhail Zelenyi
29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics
Physics of Particles and Nuclei, Sep 1, 2019
It is important for national security to control the movement of dangerous or strategically cargo... more It is important for national security to control the movement of dangerous or strategically cargo such as explosives, radioactive materials, rare and precious metals. This control can be provided by scanning transport containers by gamma rays. In this report the existing technique for scanning (dual energy method) is considered and the alternative method based on measuring the energy distribution of gamma rays is proposed. For estimation perspectives of the proposing method, the corresponding simulation was conducted by using the GEANT4 toolkit. The example of the algorithm of reconstruction the chemical composition of the scanned object is also considered. In addition the experiment for estimation energy resolution of the detector based on a scintillation crystal BGO and SiPM was carried out.
Epj Web of Conferences, 2018
During analysis of experimental data, one usually needs to restore a signal after it has been con... more During analysis of experimental data, one usually needs to restore a signal after it has been convoluted with some kind of apparatus function. According to Hadamard's definition this problem is ill-posed and requires regularization to provide sensible results. In this article we describe an implementation of the Turchin's method of statistical regularization based on the Bayesian approach to the regularization strategy.
EPL, Nov 1, 2020
PACS 52.90.+z-Other topics in physics of plasmas and electric discharges PACS 02.70.Uu-Applicatio... more PACS 52.90.+z-Other topics in physics of plasmas and electric discharges PACS 02.70.Uu-Applications of Monte Carlo methods PACS 13.40.-f-Electromagnetic processes and properties Abstract-The connection between thunderstorms and relativistic runaway electron avalanches is an important topic that has attracted the attention of many researchers. Among other things, there are a lot of various simulations of the dynamics of electron avalanches. This article was written mostly in response to the article "The critical avalanche of runaway electrons" by Evgeny Oreshkin et al, which shows rather large numbers for an estimate of the number of runaway electrons, but it also contains the results of our own simulation and comparison with other papers.
Epj Web of Conferences, 2019
Some of modern models used to describe TGF phenomenon and lightning ignition assume the existence... more Some of modern models used to describe TGF phenomenon and lightning ignition assume the existence of positive positron or gamma ray feedback. In this article we present some results of Monte-Carlo simulation of electromagnetic avalanches in atmospheric conditions and calculation of gain coefficient for both positron and gamma-ray feedback. The calculations were maid for realistic fields and acceleration cell sizes (up to 200 kV/m and 400 m respectively). The calculated gain coefficients for realistic fields and cell sizes are less than 10% which strongly discourages use of positron and gamma feedback model to describe TGF phenomenon and other gamma-production mechanisms in atmosphere under normal conditions. The simulation also shows possibility of selfsupporting positron feedback for extreme conditions like very high electric fields and very large cells.
Bulletin of the Lebedev Physics Institute, 2019
The project of the compact space detector for measuring proton (10-100 MeV) and electron (to 10 M... more The project of the compact space detector for measuring proton (10-100 MeV) and electron (to 10 MeV) energy spectra in solar cosmic rays is presented. The detector can operate in two modes: differential (each event is reconstructed) and integral (only energy spectrum and radiation composition are reconstructed at a high loading).
Nucleation and Atmospheric Aerosols, 2019
Terrestrial gamma flash (TGF) and thunderstorm ground enhancements(TGE) phenomena are crucial for... more Terrestrial gamma flash (TGF) and thunderstorm ground enhancements(TGE) phenomena are crucial for understanding of atmosphere breakdown and lightning generation physics. The initial theory was developed by Gurevich and included only runway breakdown description. It was later updated by Babich and Dwayer, but even updated models use a rather simplified field structure and do not fully explain observed quantities. The reactor like TGE (RL-TGE) model presented in this work assumes more complicated stochastic field structure and takes into account not only one cell runway breakdown, but the whole global field cellular structure in the thundercloud. It allows to describe a wide variety of TGF-like events and potentially fills the gap in thundercloud parameters previously unaccounted by other theories.
arXiv (Cornell University), Nov 2, 2020
Relativistic runaway electron avalanches (RREAs) developing in electrified clouds produce gamma r... more Relativistic runaway electron avalanches (RREAs) developing in electrified clouds produce gamma radiation which could be observed both on the ground surface and on near-Earth orbit. Radio emission of RREAs is a much less studied manifestation of the avalanche process. Meanwhile, VHF-radiation can be used as an additional source of information on conditions of the RREA development. We present the method of calculating the VHF signal produced by RREAs using Monte-Carlo simulation with GEANT4. We show that VHF radiation produced by runaway electrons has a maximum at frequency range 0.1-1 MHz, the amplitude is below the background noise.
arXiv (Cornell University), Nov 2, 2020
Relativistic runaway electron avalanches (RREAs) developing in electrified clouds produce gamma r... more Relativistic runaway electron avalanches (RREAs) developing in electrified clouds produce gamma radiation which could be observed both on the ground surface and on near-Earth orbit. Radio emission of RREAs is a much less studied manifestation of the avalanche process. Meanwhile, VHF-radiation can be used as an additional source of information on conditions of the RREA development. We present the method of calculating the VHF signal produced by RREAs using Monte-Carlo simulation with GEANT4. We show that VHF radiation produced by runaway electrons has a maximum at frequency range 0.1-1 MHz, the amplitude is below the background noise.
Added Yaml plugin Partial fix to #53 Changed Deprecated Removed Fixed MutableMetaImpl attachment ... more Added Yaml plugin Partial fix to #53 Changed Deprecated Removed Fixed MutableMetaImpl attachment and checks Listeners in observable meta are replaced by lists JS number comparison bug.
[0.4.0] Added LogManager plugin dataforge-context API dependency on SLF4j Context <code>wit... more [0.4.0] Added LogManager plugin dataforge-context API dependency on SLF4j Context <code>withEnv</code> and <code>fetch</code> methods to manipulate plugins without changing plugins after creation. Split <code>ItemDescriptor</code> into builder and read-only part Changed Kotlin-logging moved from common to JVM and JS. Replaced by console for native. Package changed to <code>space.kscience</code> Scheme made observable Global context is a variable (the singleton is hidden and will be deprecated in future) Kotlin 1.5 Added blank builders for children context. Refactor loggers Deprecated Direct use of PluginManager Removed Common dependency on Kotlin-logging Kotlinx-io fork dependency. Replaced by Ktor-io. Fixed Scheme properties properly handle children property change.
Added Experimental <code>listOfSpec</code> delegate. Changed <strong>API breaki... more Added Experimental <code>listOfSpec</code> delegate. Changed <strong>API breaking</strong> Config is deprecated, use <code>ObservableMeta</code> instead. <strong>API breaking</strong> Descriptor no has a member property <code>defaultValue</code> instead of <code>defaultItem()</code> extension. It caches default value state on the first call. It is done because computing default on each call is too expensive. Kotlin 1.5.10 Build tools 0.10.0 Relaxed type restriction on <code>MetaConverter</code>. Now nullables are available. <strong>Huge API-breaking refactoring of Meta</strong>. Meta now can have both value and children. There is only one kind of descriptor now. <strong>API breaking</strong> <code>String.toName()</code> is replaced by <code>Name.parse()</code> <strong>API breaking</strong> Configurable<code>config</code> changed ...
Added LogManager plugin dataforge-context API dependency on SLF4j Changed Kotlin-logging moved fr... more Added LogManager plugin dataforge-context API dependency on SLF4j Changed Kotlin-logging moved from common to JVM and JS. Replaced by console for native. Package changed to <code>space.kscience</code> Deprecated Removed Common dependency on Kotlin-logging Kotlinx-io fork dependency. Replaced by Ktor-io. Fixed Security
[0.2.0] Changed Context content resolution refactor Kotlin 1.4.20 (build tools 0.7.0) Empty query... more [0.2.0] Changed Context content resolution refactor Kotlin 1.4.20 (build tools 0.7.0) Empty query in Name is null instead of "" Provider provides an empty map instead of error by default Hidden delegates hierarchy in favor of stdlib properties Removed io depdendency from <code>dataforge-output</code>. Replaced Output by Appendable. Configurable is no longer MutableItemProvider. All functionality moved to Scheme. Deprecated Context activation API TextRenderer Removed Functional server prototype <code>dataforge-output</code> module Fixed Global context CoroutineScope resolution Library mode compliance
A clean multi-platform re-implementation of dataforge concepts
[0.3.0] Added Yaml meta format based on yaml.kt <code>Path</code> builders Special Va... more [0.3.0] Added Yaml meta format based on yaml.kt <code>Path</code> builders Special ValueType for lists <code>copy</code> method to descriptors Multiplatform yaml meta Changed <code>ListValue</code> and <code>DoubleArrayValue</code> implement <code>Iterable</code>. Changed the logic of <code>Value::isList</code> to check for type instead of size <code>Meta{}</code> builder made inline Moved <code>Envelope</code> builder to a top level function. Companion invoke is deprecated. Context logging moved to the extension <code>number</code> and <code>string</code> methods on <code>Value</code> moved to extensions (breaking change) [Major breaking change] Schemes and configurables us <code>MutableItemProvider</code> instead of <code>Config</code> [Major breaking change] <code>MetaItem</code> renamed to <code>TypedMetaItem</code> and <code>MetaItem</code> is now an alias for <code>TypedMetaItem<*></code> [Major breaking change] Moved <code>NodeItem</code> and <code>ValueItem</code> to a top level Plugins are removed from Context constructor and added lazily in ContextBuilder [Major breaking change] Full refactor of DataTree/DataSource [Major Breaking change] Replace KClass with KType in data. Remove direct access to constructors with types.
Relativistic runaway electron avalanches (RREAs) are generally accepted as a source of thundersto... more Relativistic runaway electron avalanches (RREAs) are generally accepted as a source of thunderstorms gamma-ray radiation. Avalanches can multiply in the electric field via the relativistic feedback mechanism based on processes with gamma-rays and positrons. This paper shows that a non-uniform electric field geometry can lead to the new RREAs multiplication mechanism-"reactor feedback", due to the exchange of high-energy particles between different accelerating regions within a thundercloud. A new method for the numerical simulation of RREA dynamics within heterogeneous electric field structures is proposed. The developed analytical description and the numerical simulation enables us to derive necessary conditions for TGF occurrence in the system with the reactor feedback Observable properties of TGFs influenced by the proposed mechanism are discussed.
Europhysics Letters, 2020
The connection between thunderstorms and relativistic runaway electron avalanches is an important... more The connection between thunderstorms and relativistic runaway electron avalanches is an important topic that has attracted the attention of many researchers. Among other things, there are a lot of various simulations of the dynamics of electron avalanches. This article was written mostly in response to the article The critical avalanche of runaway electrons by Evgeny Oreshkin (EPL, 124 (2018) 15001) which shows rather large numbers for an estimate of the number of runaway electrons. The results of our own simulation and comparison with other papers are presented.
Journal of Instrumentation, 2020
In this paper we introduce a laboratory prototype of a solar energetic particle (SEP) detector wh... more In this paper we introduce a laboratory prototype of a solar energetic particle (SEP) detector which will operate along with other space-based instruments to give us more insight into the SEP physics. The instrument is designed to detect protons and electrons with kinetic energies from 10 to 100 MeV and from 1 to 10 MeV respectively. The detector is based on a scintillation cylinder divided into separated disks to get more information about detected particles. Scintillation light from isolated segments is collected by optical fibers and detected with silicon photo-multipliers (SiPM). The work contains the result of laboratory testing of the detector prototype. The detector channels were calibrated, energy resolution for every channel was obtained. Moreover, we present an advanced integral data acquisition and analysis technique based on Bayesian statistics, which will allow operation even during SEP events with very large fluxes. The work is motivated by the need for better measurement tools to study acceleration and transport of SEP in the heliosphere as well as by the need for monitoring tool to mitigate radiation hazard for equipment and people in space.
PROCEEDINGS OF THE 23RD INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2019), 2019
Terrestrial gamma flash (TGF) and thunderstorm ground enhancements(TGE) phenomena are crucial for... more Terrestrial gamma flash (TGF) and thunderstorm ground enhancements(TGE) phenomena are crucial for understanding of atmosphere breakdown and lightning generation physics. The initial theory was developed by Gurevich and included only runway breakdown description. It was later updated by Babich and Dwayer, but even updated models use a rather simplified field structure and do not fully explain observed quantities. The reactor like TGE (RL-TGE) model presented in this work assumes more complicated stochastic field structure and takes into account not only one cell runway breakdown, but the whole global field cellular structure in the thundercloud. It allows to describe a wide variety of TGF-like events and potentially fills the gap in thundercloud parameters previously unaccounted by other theories.
29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics
Physics of Particles and Nuclei, Sep 1, 2019
It is important for national security to control the movement of dangerous or strategically cargo... more It is important for national security to control the movement of dangerous or strategically cargo such as explosives, radioactive materials, rare and precious metals. This control can be provided by scanning transport containers by gamma rays. In this report the existing technique for scanning (dual energy method) is considered and the alternative method based on measuring the energy distribution of gamma rays is proposed. For estimation perspectives of the proposing method, the corresponding simulation was conducted by using the GEANT4 toolkit. The example of the algorithm of reconstruction the chemical composition of the scanned object is also considered. In addition the experiment for estimation energy resolution of the detector based on a scintillation crystal BGO and SiPM was carried out.
Epj Web of Conferences, 2018
During analysis of experimental data, one usually needs to restore a signal after it has been con... more During analysis of experimental data, one usually needs to restore a signal after it has been convoluted with some kind of apparatus function. According to Hadamard's definition this problem is ill-posed and requires regularization to provide sensible results. In this article we describe an implementation of the Turchin's method of statistical regularization based on the Bayesian approach to the regularization strategy.
EPL, Nov 1, 2020
PACS 52.90.+z-Other topics in physics of plasmas and electric discharges PACS 02.70.Uu-Applicatio... more PACS 52.90.+z-Other topics in physics of plasmas and electric discharges PACS 02.70.Uu-Applications of Monte Carlo methods PACS 13.40.-f-Electromagnetic processes and properties Abstract-The connection between thunderstorms and relativistic runaway electron avalanches is an important topic that has attracted the attention of many researchers. Among other things, there are a lot of various simulations of the dynamics of electron avalanches. This article was written mostly in response to the article "The critical avalanche of runaway electrons" by Evgeny Oreshkin et al, which shows rather large numbers for an estimate of the number of runaway electrons, but it also contains the results of our own simulation and comparison with other papers.
Epj Web of Conferences, 2019
Some of modern models used to describe TGF phenomenon and lightning ignition assume the existence... more Some of modern models used to describe TGF phenomenon and lightning ignition assume the existence of positive positron or gamma ray feedback. In this article we present some results of Monte-Carlo simulation of electromagnetic avalanches in atmospheric conditions and calculation of gain coefficient for both positron and gamma-ray feedback. The calculations were maid for realistic fields and acceleration cell sizes (up to 200 kV/m and 400 m respectively). The calculated gain coefficients for realistic fields and cell sizes are less than 10% which strongly discourages use of positron and gamma feedback model to describe TGF phenomenon and other gamma-production mechanisms in atmosphere under normal conditions. The simulation also shows possibility of selfsupporting positron feedback for extreme conditions like very high electric fields and very large cells.
Bulletin of the Lebedev Physics Institute, 2019
The project of the compact space detector for measuring proton (10-100 MeV) and electron (to 10 M... more The project of the compact space detector for measuring proton (10-100 MeV) and electron (to 10 MeV) energy spectra in solar cosmic rays is presented. The detector can operate in two modes: differential (each event is reconstructed) and integral (only energy spectrum and radiation composition are reconstructed at a high loading).
Nucleation and Atmospheric Aerosols, 2019
Terrestrial gamma flash (TGF) and thunderstorm ground enhancements(TGE) phenomena are crucial for... more Terrestrial gamma flash (TGF) and thunderstorm ground enhancements(TGE) phenomena are crucial for understanding of atmosphere breakdown and lightning generation physics. The initial theory was developed by Gurevich and included only runway breakdown description. It was later updated by Babich and Dwayer, but even updated models use a rather simplified field structure and do not fully explain observed quantities. The reactor like TGE (RL-TGE) model presented in this work assumes more complicated stochastic field structure and takes into account not only one cell runway breakdown, but the whole global field cellular structure in the thundercloud. It allows to describe a wide variety of TGF-like events and potentially fills the gap in thundercloud parameters previously unaccounted by other theories.
arXiv (Cornell University), Nov 2, 2020
Relativistic runaway electron avalanches (RREAs) developing in electrified clouds produce gamma r... more Relativistic runaway electron avalanches (RREAs) developing in electrified clouds produce gamma radiation which could be observed both on the ground surface and on near-Earth orbit. Radio emission of RREAs is a much less studied manifestation of the avalanche process. Meanwhile, VHF-radiation can be used as an additional source of information on conditions of the RREA development. We present the method of calculating the VHF signal produced by RREAs using Monte-Carlo simulation with GEANT4. We show that VHF radiation produced by runaway electrons has a maximum at frequency range 0.1-1 MHz, the amplitude is below the background noise.
arXiv (Cornell University), Nov 2, 2020
Relativistic runaway electron avalanches (RREAs) developing in electrified clouds produce gamma r... more Relativistic runaway electron avalanches (RREAs) developing in electrified clouds produce gamma radiation which could be observed both on the ground surface and on near-Earth orbit. Radio emission of RREAs is a much less studied manifestation of the avalanche process. Meanwhile, VHF-radiation can be used as an additional source of information on conditions of the RREA development. We present the method of calculating the VHF signal produced by RREAs using Monte-Carlo simulation with GEANT4. We show that VHF radiation produced by runaway electrons has a maximum at frequency range 0.1-1 MHz, the amplitude is below the background noise.
Added Yaml plugin Partial fix to #53 Changed Deprecated Removed Fixed MutableMetaImpl attachment ... more Added Yaml plugin Partial fix to #53 Changed Deprecated Removed Fixed MutableMetaImpl attachment and checks Listeners in observable meta are replaced by lists JS number comparison bug.
[0.4.0] Added LogManager plugin dataforge-context API dependency on SLF4j Context <code>wit... more [0.4.0] Added LogManager plugin dataforge-context API dependency on SLF4j Context <code>withEnv</code> and <code>fetch</code> methods to manipulate plugins without changing plugins after creation. Split <code>ItemDescriptor</code> into builder and read-only part Changed Kotlin-logging moved from common to JVM and JS. Replaced by console for native. Package changed to <code>space.kscience</code> Scheme made observable Global context is a variable (the singleton is hidden and will be deprecated in future) Kotlin 1.5 Added blank builders for children context. Refactor loggers Deprecated Direct use of PluginManager Removed Common dependency on Kotlin-logging Kotlinx-io fork dependency. Replaced by Ktor-io. Fixed Scheme properties properly handle children property change.
Added Experimental <code>listOfSpec</code> delegate. Changed <strong>API breaki... more Added Experimental <code>listOfSpec</code> delegate. Changed <strong>API breaking</strong> Config is deprecated, use <code>ObservableMeta</code> instead. <strong>API breaking</strong> Descriptor no has a member property <code>defaultValue</code> instead of <code>defaultItem()</code> extension. It caches default value state on the first call. It is done because computing default on each call is too expensive. Kotlin 1.5.10 Build tools 0.10.0 Relaxed type restriction on <code>MetaConverter</code>. Now nullables are available. <strong>Huge API-breaking refactoring of Meta</strong>. Meta now can have both value and children. There is only one kind of descriptor now. <strong>API breaking</strong> <code>String.toName()</code> is replaced by <code>Name.parse()</code> <strong>API breaking</strong> Configurable<code>config</code> changed ...
Added LogManager plugin dataforge-context API dependency on SLF4j Changed Kotlin-logging moved fr... more Added LogManager plugin dataforge-context API dependency on SLF4j Changed Kotlin-logging moved from common to JVM and JS. Replaced by console for native. Package changed to <code>space.kscience</code> Deprecated Removed Common dependency on Kotlin-logging Kotlinx-io fork dependency. Replaced by Ktor-io. Fixed Security
[0.2.0] Changed Context content resolution refactor Kotlin 1.4.20 (build tools 0.7.0) Empty query... more [0.2.0] Changed Context content resolution refactor Kotlin 1.4.20 (build tools 0.7.0) Empty query in Name is null instead of "" Provider provides an empty map instead of error by default Hidden delegates hierarchy in favor of stdlib properties Removed io depdendency from <code>dataforge-output</code>. Replaced Output by Appendable. Configurable is no longer MutableItemProvider. All functionality moved to Scheme. Deprecated Context activation API TextRenderer Removed Functional server prototype <code>dataforge-output</code> module Fixed Global context CoroutineScope resolution Library mode compliance
A clean multi-platform re-implementation of dataforge concepts
[0.3.0] Added Yaml meta format based on yaml.kt <code>Path</code> builders Special Va... more [0.3.0] Added Yaml meta format based on yaml.kt <code>Path</code> builders Special ValueType for lists <code>copy</code> method to descriptors Multiplatform yaml meta Changed <code>ListValue</code> and <code>DoubleArrayValue</code> implement <code>Iterable</code>. Changed the logic of <code>Value::isList</code> to check for type instead of size <code>Meta{}</code> builder made inline Moved <code>Envelope</code> builder to a top level function. Companion invoke is deprecated. Context logging moved to the extension <code>number</code> and <code>string</code> methods on <code>Value</code> moved to extensions (breaking change) [Major breaking change] Schemes and configurables us <code>MutableItemProvider</code> instead of <code>Config</code> [Major breaking change] <code>MetaItem</code> renamed to <code>TypedMetaItem</code> and <code>MetaItem</code> is now an alias for <code>TypedMetaItem<*></code> [Major breaking change] Moved <code>NodeItem</code> and <code>ValueItem</code> to a top level Plugins are removed from Context constructor and added lazily in ContextBuilder [Major breaking change] Full refactor of DataTree/DataSource [Major Breaking change] Replace KClass with KType in data. Remove direct access to constructors with types.
Relativistic runaway electron avalanches (RREAs) are generally accepted as a source of thundersto... more Relativistic runaway electron avalanches (RREAs) are generally accepted as a source of thunderstorms gamma-ray radiation. Avalanches can multiply in the electric field via the relativistic feedback mechanism based on processes with gamma-rays and positrons. This paper shows that a non-uniform electric field geometry can lead to the new RREAs multiplication mechanism-"reactor feedback", due to the exchange of high-energy particles between different accelerating regions within a thundercloud. A new method for the numerical simulation of RREA dynamics within heterogeneous electric field structures is proposed. The developed analytical description and the numerical simulation enables us to derive necessary conditions for TGF occurrence in the system with the reactor feedback Observable properties of TGFs influenced by the proposed mechanism are discussed.
Europhysics Letters, 2020
The connection between thunderstorms and relativistic runaway electron avalanches is an important... more The connection between thunderstorms and relativistic runaway electron avalanches is an important topic that has attracted the attention of many researchers. Among other things, there are a lot of various simulations of the dynamics of electron avalanches. This article was written mostly in response to the article The critical avalanche of runaway electrons by Evgeny Oreshkin (EPL, 124 (2018) 15001) which shows rather large numbers for an estimate of the number of runaway electrons. The results of our own simulation and comparison with other papers are presented.
Journal of Instrumentation, 2020
In this paper we introduce a laboratory prototype of a solar energetic particle (SEP) detector wh... more In this paper we introduce a laboratory prototype of a solar energetic particle (SEP) detector which will operate along with other space-based instruments to give us more insight into the SEP physics. The instrument is designed to detect protons and electrons with kinetic energies from 10 to 100 MeV and from 1 to 10 MeV respectively. The detector is based on a scintillation cylinder divided into separated disks to get more information about detected particles. Scintillation light from isolated segments is collected by optical fibers and detected with silicon photo-multipliers (SiPM). The work contains the result of laboratory testing of the detector prototype. The detector channels were calibrated, energy resolution for every channel was obtained. Moreover, we present an advanced integral data acquisition and analysis technique based on Bayesian statistics, which will allow operation even during SEP events with very large fluxes. The work is motivated by the need for better measurement tools to study acceleration and transport of SEP in the heliosphere as well as by the need for monitoring tool to mitigate radiation hazard for equipment and people in space.
PROCEEDINGS OF THE 23RD INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2019), 2019
Terrestrial gamma flash (TGF) and thunderstorm ground enhancements(TGE) phenomena are crucial for... more Terrestrial gamma flash (TGF) and thunderstorm ground enhancements(TGE) phenomena are crucial for understanding of atmosphere breakdown and lightning generation physics. The initial theory was developed by Gurevich and included only runway breakdown description. It was later updated by Babich and Dwayer, but even updated models use a rather simplified field structure and do not fully explain observed quantities. The reactor like TGE (RL-TGE) model presented in this work assumes more complicated stochastic field structure and takes into account not only one cell runway breakdown, but the whole global field cellular structure in the thundercloud. It allows to describe a wide variety of TGF-like events and potentially fills the gap in thundercloud parameters previously unaccounted by other theories.