Dr. Gennadii E. Kotkovskii Profile

Dr. Gennadii E. Kotkovskii

Assistant Professor at National Research Nuclear Univ MEPhI

SPIE Involvement:

Author

Publications (35)

SPIE Journal Paper | 23 March 2023

Study of terahertz reflection spectra of optically thin RDX samples by terahertz imaging with spectral resolution

Andrei Plekhanov, Artem Akmalov, Gennadii Kotkovskii, Konstantin Kozlovskii, Yury Kuzishchin, Igor Martynov, Evgenii Maksimov, Evgenii Osipov, Alexander Chistyakov

OE, Vol. 62, Issue 03, 034109, (March 2023) https://doi.org/10.1117/12.10.1117/1.OE.62.3.034109

KEYWORDS: Terahertz radiation, Reflection, Millimeter wave imaging, Video, Cameras, Spectral resolution, Absorption, Scattering, Particles, Laser radiation

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Proceedings Article | 28 October 2022 Poster + Paper

Poster + Paper

Detection of objects hidden behind various barriers using the THz radiovision method

A. Akmalov, G. Kotkovskii, K. Kozlovskii, E. Maksimov, I. Martynov, E. Osipov, A. Plekhanov, Yu. Kuzishchin, A. Chistyakov

Proceedings Volume 12275, 122750J (2022) https://doi.org/10.1117/12.2636168

KEYWORDS: Terahertz radiation, Explosives, Explosives detection, Antennas, Video, Packaging, Reflection, Imaging spectroscopy, Reflectivity

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Proceedings Article | 28 October 2022 Presentation + Paper

Presentation + Paper

Stationary two-unit detector of explosives with a light detector module based on traditional ion mobility spectrometry

Alexander Chistyakov, Gennadii Kotkovskii

Proceedings Volume 12275, 1227503 (2022) https://doi.org/10.1117/12.2635927

KEYWORDS: Ions, Spectroscopy, Ultraviolet radiation, Explosives, Optical fibers, Molecules, Sensors, Pulsed laser operation, Ionization

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Proceedings Article | 28 October 2022 Presentation + Paper

Presentation + Paper

Photostability of luminophores sensitive to vapors of nitroaromatic compounds in a porous silicon microcavity

T. Kharinoeva, I. Martynov, E. Osipov, G. Kotkovskii, A. Chistyakov

Proceedings Volume 12275, 1227504 (2022) https://doi.org/10.1117/12.2636334

KEYWORDS: Luminescence, Optical microcavities, Oxygen, Silicon, Sensors, Polymers, Mirrors, Etching, Diffusion

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Proceedings Article | 28 October 2022 Paper

Paper

Use of dopants for detection of vapors of explosives by laser field asymmetric ion mobility spectrometer

Artem Akmalov, Alexander Chistyakov, Gennadii Kotkovskii, Vitaly Kostarev

Proceedings Volume 12275, 1227502 (2022) https://doi.org/10.1117/12.2635924

KEYWORDS: Ions, Ionization, Explosives, Spectroscopy, Pulsed laser operation, Signal to noise ratio, Laser energy, Sensors, Electrons, Molecules

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Proceedings Article | 12 September 2021 Presentation + Paper

Presentation + Paper

Detection of trace mm- and sub-mm particles of organic substances using THz imaging with spectral resolution

A. Akmalov, G. Kotkovskii, K. Kozlovskii, E. Maksimov, I. Martynov, E. Osipov, A. Plekhanov, Yu. Kuzishchin, A. Chistyakov

Proceedings Volume 11869, 1186907 (2021) https://doi.org/10.1117/12.2599920

KEYWORDS: Terahertz radiation, Spectral resolution, Bandpass filters, Imaging spectroscopy, Explosives, Scattering

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Proceedings Article | 12 September 2021 Presentation + Paper

Presentation + Paper

Portable aerosol sampler with liquid phase for collection of biopathogens at subzero temperatures

Artem Akmalov, Sergei Belenok, Vitaly Kostarev, Gennadii Kotkovskii, Alexander Chistyakov

Proceedings Volume 11869, 118690B (2021) https://doi.org/10.1117/12.2597974

KEYWORDS: Liquids, Particles, Aerosols, Biological research, Atmospheric particles, Bioalcohols, Microorganisms

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Proceedings Article | 12 September 2021 Presentation

Presentation

Improvement of explosive vapors recognition by variation of drift gas composition inside laser FAIMS

Gennadii Kotkovskii, Alexander Chistyakov, Artem Akmalov, Vitaly Kostarev

Proceedings Volume 11869, 1186909 (2021) https://doi.org/10.1117/12.2597976

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In this paper we study the influence of the carrier and drift gas composition on ionization processes taking place inside drift chamber of field asymmetric ion mobility spectrometer with laser ionization. Solid state nanosecond laser of YAG:Nd 3+ type with fourth harmonic unit (λ = 266 nm, τpulse = 6 ns, E pulse = 700 – 2500 μJ, ν = 10 – 20 Hz) was used for negative ion generation. In this study we experimentally discover the features of laser ionization of four nitro-compounds: cyclotrimethylenetrinitramine (RDX), cyclotetramethylenetetranitramine (HMX), pentaerythritol tetranitrate (PETN), trinitrotoluene (TNT) explosives. Drift and sample carrier gas were prepared by mixing purified air with different amounts of water vapor and organic dopants. Ion mobility increments were calculated after calibration of field asymmetric ion mobility spectrometer (FAIMS) based on published data for TNT and Iodine and measured alternating separation field waveform. The experimental setup also included drift time ion mobility spectrometer (IMS) which was used to verify linear ion mobility spectra to supplement ion mobility increment values, obtained by FAIMS. Previous studies of laser ionization with optimization of intensity and pulse repetition rates gave LOD values well below 10−15 g/cm3: 3 × 10−15 g/cm3 for RDX, 8 × 10−15 g/cm3 for PETN and less than 3 × 10−15 g/cm3 for HMX. Common ideas about ionization mechanisms of nitro-based explosives propose that indirect processes with ion-molecular reactions substantially contribute to negative ion formation as well as resonant enhanced multi photon ionization (REMPI) direct processes. Ionization process starts with electron generation by organic impurities in atmospheric air. These organic compounds have low ionization energy and require less than two photons to ionize. Current research involves doping air sample with such substances as: toluene acetone, naphthalene and chloroform at different UV irradiation modes. Such compounds can act as electron source for rising TNT and RDX ion signal levels above background. Such selectivity enhancement can be a step on the way to achieving even lower detection limits to sense trace explosive vapor concentrations in real conditions.

Proceedings Article | 12 September 2021 Presentation + Paper

Presentation + Paper

Photon counting mode for advanced real-time detection of bioaerosols

Artem Akmalov, Alexander Chistyakov, Gennadii Kotkovskii, Yury Kuzishchin, Igor Martynov, Evgenii Osipov, Alexandra Pashkevich, Artem Tkachuk, Bakhtiyar Verdiev, Artem Alatyrev

Proceedings Volume 11869, 1186906 (2021) https://doi.org/10.1117/12.2600476

KEYWORDS: Atmospheric particles, Photodetectors, Aerosols, Luminescence, Light emitting diodes, Curium, Photon counting, Particles, Analog electronics, Signal detection

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Proceedings Article | 12 September 2021 Presentation + Paper

Presentation + Paper

Preconcentration of vapors of low-volatile explosives for ion mobility spectrometry

Artem Akmalov, Alexander Chistyakov, Gennadii Kotkovskii, Vitaly Kostarev, Kirill Lavrinenko

Proceedings Volume 11869, 1186905 (2021) https://doi.org/10.1117/12.2597962

KEYWORDS: Ions, Explosives, Spectrometers, Molecules, Chemical analysis

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Proceedings Article | 20 September 2020 Presentation + Paper

Presentation + Paper

Portable aerosol collector with liquid circulation mounted on a drone

Artem Akmalov, Sergei Belenok, Anastasia Kadyrova, Veronika Kirillova, Vitaly Kostarev, Gennadii Kotkovskii, Alexander Chistyakov

Proceedings Volume 11542, 115420J (2020) https://doi.org/10.1117/12.2572653

KEYWORDS: Aerosols, Liquids, Statistical analysis, Atmospheric particles, Microorganisms, Biological research, Pathogens, Solar concentrators, Atmospheric monitoring, Particles

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Proceedings Article | 20 September 2020 Presentation + Paper

Presentation + Paper

About impurities in cyclotrhylmethylentrinitramine and the possibility of detecting its vapor

Artem Akmalov, Alexander Chistyakov, Gennadii Kotkovskii, Vitaly Kostarev, Alexander Kulintsov, Kirill Lavrinenko

Proceedings Volume 11542, 115420K (2020) https://doi.org/10.1117/12.2572772

KEYWORDS: Chemical analysis, Statistical analysis, Spectroscopy, Explosives, Biological research, Ionization, Ions, Molecules, Oxygen, Nitrogen dioxide

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Proceedings Article | 17 September 2020 Poster + Presentation + Paper

Poster + Presentation + Paper

THz imaging with spectral resolution for identification of traces of explosives

A. Akmalov, G. Kotkovskii, K. Kozlovskii, E. Maksimov, A. Plekhanov, A. Chistyakov

Proceedings Volume 11542, 115420O (2020) https://doi.org/10.1117/12.2573795

KEYWORDS: Terahertz radiation, Information visualization, Antennas, Spectral resolution, Visualization, Video, Explosives, Cameras, Terahertz spectroscopy, Terahertz technology, Terahertz detection, Imaging systems, Security technologies

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Proceedings Article | 17 September 2020 Presentation

Presentation

Ion mobility spectra of explosives in field asymmetric ion mobility spectrometry method with separating field variation under laser ionization

Gennadii Kotkovskii, Vitaly Kostarev, Artem Akmalov, Alexander Chistyakov

Proceedings Volume 11542, 115420G (2020) https://doi.org/10.1117/12.2573956

KEYWORDS: Ions, Explosives, Ionization, Spectroscopy, Humidity, Nickel, Ion lasers, Laser sources, Molecules, Ultraviolet radiation

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The distinctive features of laser ionization source in field asymmetric ion mobility spectrometry method are studied in this paper. A YAG:Nd 3+ nanosecond laser (λ = 266 nm, τpulse = 6 ns) with variable pulse energy E pulse = 700 – 2500 μJ and frequency ν = 10 – 20 Hz was used as a source of laser radiation. Pentaerythritol tetranitrate (PETN), trinitrotoluene (TNT) cyclotrimethylenetrinitramine (RDX), 1,3,5,7-tetranitro-1,3,5,7-tetrazoctane (HMX), explosives were investigated with use of field asymmetric ion mobility spectrometry (FAIMS) method. Ion spectra were recorded by with separating fields 8 – 12 kV/cm. Nickel radioactive isotope 63Ni was used as reference ionization source for explosive molecules. Non-linear ion mobility spectra of each substance ionized with UV laser radiation and radioactive 63Ni were compared and reasons for similarities and distinctive features are discussed. For peaks of explosives and reactant-ion peaks the dependences of their positions along compensating voltage axis on the magnitude of separating voltage (separating electric field) were measured for all the ion sources and substances. All the experiments were carried out under controlled ambient temperature and relative humidity (t=25℃, RH 30%). Humidity was supported the same inside and outside the gas system to minimize the influence of water cluster formation on the results obtained. Explosives vapors generators were made with 10mg samples of chemically pure explosives. RDX, HMX and PETN were heated (RDX 50℃, HMX 50℃, PETN 45℃) to increase the concentration of ions. It was shown that the behavior of the peaks of the explosives at laser excitation is different from the behavior at radioactive source for each of the substances. This indicates the presence of an additional ionization mechanism under laser radiation along with the traditional one. Spectra of reactant ion peaks under radioactive ionization also show difference in ion formation for each substance. Behavior of reactant-ion peaks of each of the substances with laser ion source shows nearly perfect coincidence. This fact can demonstrate well controlled experimental conditions and further confirms the difference in ionization mechanisms for laser and nickel radioactive ion source.

Proceedings Article | 7 October 2019 Presentation + Paper

Presentation + Paper

Spectral identification of traces of explosives in reflected terahertz radiation

A. Akmalov, E. Aksenov, G. Kotkovskii, K. Kozlovskii, E. Maksimov, A. Plekhanov, A. Chistyakov

Proceedings Volume 11166, 111660A (2019) https://doi.org/10.1117/12.2532325

KEYWORDS: Terahertz radiation, Particles, Scattering, Reflection, Absorption, Mirrors, Signal attenuation, Explosives, Antennas, Crystals

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Proceedings Article | 7 October 2019 Presentation + Paper

Presentation + Paper

Detection of vapors of explosives by field asymmetric ion mobility spectrometry method with laser ionization

Artem Akmalov, Alexander Chistyakov, Gennadii Kotkovskii, Vitaly Kostarev

Proceedings Volume 11166, 1116603 (2019) https://doi.org/10.1117/12.2532321

KEYWORDS: Ions, Ionization, Explosives, Nickel, Molecules, Ultraviolet radiation

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Proceedings Article | 7 October 2019 Presentation + Paper

Presentation + Paper

High-performance aerosol collector with liquid phase circulation and pre-concentration of particles

Artem Akmalov, Gennadii Kotkovskii, Stanislav Stolyarov, Bakhtiyar Verdiev, Vladimir Gushchin, Artem Tkachuk, Alexander Chistyakov

Proceedings Volume 11166, 1116605 (2019) https://doi.org/10.1117/12.2532326

KEYWORDS: Atmospheric particles, Aerosols, Liquids, Particles, Microorganisms, Resistance, Pathogens, Atmospheric modeling, Control systems

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Proceedings Article | 7 October 2019 Presentation + Paper

Presentation + Paper

Application of a cyclone collector with a recirculating liquid phase for concentrating microparticles, localized as traces on surfaces

Artem Akmalov, Alexander Chistyakov, Gennadii Kotkovskii, Denis Turbin

Proceedings Volume 11166, 1116602 (2019) https://doi.org/10.1117/12.2532328

KEYWORDS: Atmospheric particles, Explosives, Aerosols, Particles, Biological research, Chemical analysis

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Proceedings Article | 7 October 2019 Presentation + Paper

Presentation + Paper

Pyrimidine-based dyes embedded in porous silicon microcavities for detection of nitroaromatic compounds

Igor Martynov, Evgeniy Osipov, Yriy Kuzishchin, Gennadii Kotkovskii, Egor Verbitskiy, Anna Baranova, Gennady Rusinov, Valery Charushin, Alexander Chistyakov

Proceedings Volume 11166, 1116604 (2019) https://doi.org/10.1117/12.2534674

KEYWORDS: Luminescence, Sensors, Silicon, Optical microcavities, Explosives, Photonic crystals

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Proceedings Article | 8 October 2018 Presentation + Paper

Presentation + Paper

Parameters of laser ionization of explosives for ion mobility spectrometry

Artem Akmalov, Alexander Chistyakov, Gennadii Kotkovskii, Vitalii Kostarev

Proceedings Volume 10802, 108020A (2018) https://doi.org/10.1117/12.2500340

KEYWORDS: Ions, Ionization, Molecules, Pulsed laser operation, Explosives, Laser energy

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Proceedings Article | 8 October 2018 Paper

Paper

Porous silicon microcavities with embedded conjugated polymers for explosives detection

Igor Martynov, Evgenii Osipov, Gennadii Kotkovskii, Irina Kryukova, Yury Kuzischcin, Alexander Chistyakov

Proceedings Volume 10802, 1080205 (2018) https://doi.org/10.1117/12.2500192

KEYWORDS: Polymers, Mirrors, Luminescence, Optical microcavities, Sensors, Silicon, Temperature metrology, Reflection, Explosives detection, Optical sensors

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Proceedings Article | 8 October 2018 Presentation + Paper

Presentation + Paper

Using dopants to increase the sensitivity of a laser field asymmetric ion mobility spectrometer for detection of explosives

Artem Akmalov, Alexander Chistyakov, Gennadii Kotkovskii, Anna Teslya

Proceedings Volume 10802, 108020B (2018) https://doi.org/10.1117/12.2325060

KEYWORDS: Ions, Ionization, Spectroscopy, Oxygen, Explosives, Molecules, Pulsed laser operation, Explosives detection

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Proceedings Article | 5 October 2018 Presentation + Paper

Presentation + Paper

Registration and spectral identification of THz images in reflected or transmitted light

A. Akmalov, E. Aksenov, K. Kozlovskii, G. Kotkovskii, V. Luchinin, E. Maximov, Yu. Mityagin, A. Plekhanov, A. Chistyakov

Proceedings Volume 10800, 108000G (2018) https://doi.org/10.1117/12.2325385

KEYWORDS: Terahertz radiation, Explosives, Antennas, Image registration, Michelson interferometers, Absorption, Cameras, Mirrors, Video, Image processing

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Proceedings Article | 5 October 2017 Paper

Paper

Active vortex sampling system for remote contactless survey of surfaces by laser-based field asymmetrical ion mobility spectrometer

Artem Akmalov, Alexander Chistyakov, Gennadii Kotkovskii, Alexei Sychev

Proceedings Volume 10441, 1044105 (2017) https://doi.org/10.1117/12.2279011

KEYWORDS: Spectroscopy, Ions, Explosives, Signal detection, Mathematical modeling, Computer simulations, Inspection

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Proceedings Article | 24 October 2016 Presentation + Paper

Presentation + Paper

Laser desorption of explosives traces at ambient conditions

Artem Akmalov, Alexander Chistyakov, Olga Dubkova, Gennadii Kotkovskii, Evgenii Spitsyn, Nikolai Buzinov

Proceedings Volume 9995, 99950G (2016) https://doi.org/10.1117/12.2241813

KEYWORDS: Explosives, Sensors, Radiation effects, Explosives detection, Spectroscopy, Pulsed laser operation, Laser development, Ions, Molecules, Neodymium

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Proceedings Article | 12 May 2016 Paper

Paper

A new approach for detection of explosives based on ion mobility spectrometry and laser desorption/ionization on porous silicon

Yury Kuzishchin, Gennadii Kotkovskii, Igor Martynov, Dmitriy Dovzhenko, Alexander Chistyakov

Proceedings Volume 9824, 98241A (2016) https://doi.org/10.1117/12.2224243

KEYWORDS: Silicon, Semiconductor lasers, Explosives detection, Explosives, Spectroscopy, Molecules, Ionization, Ions, Molecular lasers, Laser irradiation

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Proceedings Article | 3 May 2016 Paper

Paper

Effectiveness of laser sources for contactless sampling of explosives

Artem Akmalov, Alexander Chistyakov, Gennadii Kotkovskii

Proceedings Volume 9823, 982311 (2016) https://doi.org/10.1117/12.2222188

KEYWORDS: Explosives, Molecules, Ions, Molecular lasers, Ultraviolet radiation, Aluminum, Telescopic pixel displays, Spectroscopy, Quartz, Absorption

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Proceedings Article | 21 October 2015 Paper

Paper

Laser desorption of explosives as a way to create an effective non-contact sampling device

Artem Akmalov, Alexander Chistyakov, Gennadii Kotkovskii

Proceedings Volume 9652, 965206 (2015) https://doi.org/10.1117/12.2190819

KEYWORDS: Molecules, Explosives, Ions, Ultraviolet radiation, Molecular lasers, Absorption, Pulsed laser operation, YAG lasers, Spectroscopy, Quartz

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Proceedings Article | 14 May 2015 Paper

Paper

A method for detecting ultra-low quantities of explosives with use a picosecond laser FAIMS analyzer

Alexander Chistyakov, Gennadii Kotkovskii, Ivan Odulo, Alexey Sychev, Artem Bogdanov, Anatoly Perederiy, Evgeny Spitsyn, Alexander Shestakov

Proceedings Volume 9454, 94540S (2015) https://doi.org/10.1117/12.2085299

KEYWORDS: Ions, Picosecond phenomena, Explosives, Ionization, Molecules, Pulsed laser operation, Laser development, Signal detection, Sensors, Spectroscopy

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Proceedings Article | 7 October 2014 Paper

Paper

A picosecond laser FAIMS analyzer for detecting ultralow quantities of explosives

Alexander Chistyakov, Gennadii Kotkovskii, Alexey Sychev, Ivan Odulo, Artem Bogdanov, Anatoly Perederiy, Evgeny Spitsyn, Alexander Shestakov

Proceedings Volume 9253, 925302 (2014) https://doi.org/10.1117/12.2065550

KEYWORDS: Ions, Picosecond phenomena, Explosives, Ionization, Spectrometers, Signal detection, Laser development, Pulsed laser operation, Ultraviolet radiation, Molecules

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Proceedings Article | 9 June 2014 Paper

Paper

A laser-based FAIMS detector for detection of ultra-low concentrations of explosives

Artem Akmalov, Alexander Chistyakov, Gennadii Kotkovskii, Alexey Sychev, Anton Tugaenko, Artem Bogdanov, Anatoly Perederiy, Eugene Spitsyn

Proceedings Volume 9081, 90810E (2014) https://doi.org/10.1117/12.2049820

KEYWORDS: Ions, Spectroscopy, Explosives, Ionization, Sensors, Pulsed laser operation, Laser development, Molecules, Molecular lasers, Ion lasers

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Proceedings Article | 29 May 2014 Paper

Paper

An excimer-based FAIMS detector for detection of ultra-low concentration of explosives

Alexander Chistyakov, Gennadii Kotkovskii, Alexey Sychev, Anatoly Perederiy, V. Budovich, D. Budovich

Proceedings Volume 9072, 907211 (2014) https://doi.org/10.1117/12.2049823

KEYWORDS: Ions, Explosives, Excimers, Ionization, Sensors, Lamps, Photons, Absorption, Ultraviolet radiation, Explosives detection

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Proceedings Article | 2 May 2014 Paper

Paper

Photoluminescence of CdSe/ZnS quantum dots in a porous silicon microcavity

Dmitriy Dovzhenko, Igor Martynov, Pavel Samokhvalov, Igor Eremin, Gennadii Kotkovskii, Igor Sipailo, Alexander Chistyakov

Proceedings Volume 9126, 91263O (2014) https://doi.org/10.1117/12.2057922

KEYWORDS: Luminescence, Silicon, Optical microcavities, Quantum dots, Photonic crystals, Mirrors, Absorbance, Oxides, Reflection, Oxidation

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Proceedings Article | 2 May 2014 Paper

Paper

Surface ligands affect photoinduced modulation of the quantum dots optical performance

Victor Krivenkov, Pavel Samokhvalov, Pavel Linkov, Daria Solovyeva, Gennadii Kotkovskii, Alexander Chistyakov, Igor Nabiev

Proceedings Volume 9126, 91263N (2014) https://doi.org/10.1117/12.2057828

KEYWORDS: Luminescence, Particles, Nanocrystals, Quantum dots, Optical properties, Oxides, Absorption, Laser irradiation, Oxygen, Ultraviolet radiation

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Proceedings Article | 15 March 1999 Paper

Paper

Photoprocesses on the surface of nanoporous semiconductors

Yuri Bykovsky, A. Chistyakov, G. Kotkovskii, M. Kuznetsov, V. Karavanskii

Proceedings Volume 3734, (1999) https://doi.org/10.1117/12.342369

KEYWORDS: Silicon, Semiconductors, Gallium arsenide, Luminescence, Semiconductor lasers, Gallium, Molecules, Physics, Pulsed laser operation, Absorption

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Showing 5 of 35 publications

Conference Committee Involvement (5)

Artificial Intelligence for Security and Defence Applications

4 September 2023 | Amsterdam, Netherlands

Counterterrorism, Crime Fighting, Forensics, and Surveillance Technologies VI

5 September 2022 | Berlin, Germany

Counterterrorism, Crime Fighting, Forensics, and Surveillance Technologies V

13 September 2021 | Online Only, Spain

Counterterrorism, Crime Fighting, Forensics, and Surveillance Technologies IV

22 September 2020 | Online Only, United Kingdom

Counterterrorism, Crime Fighting, Forensics, and Surveillance Technologies III

9 September 2019 | Strasbourg, France

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