Dr. Vladimir D. Kuptsov Profile

Dr. Vladimir D. Kuptsov

Professor of Department at Peter the Great Saint-Petersburg Polytechnic Univ

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Publications (5)

Proceedings Article | 31 October 2016 Paper

Spatial distribution of current density and thermal resistance of high-power AlInGaN vertical and face-up light-emitting diodes

A. Aladov, V. Kuptsov, A. Chernyakov, A. Zakgeim, V. Valyukhov

Proceedings Volume 10021, 100210X (2016) https://doi.org/10.1117/12.2242939

KEYWORDS: Light emitting diodes, Resistance, Electroluminescence, Near field, Energy efficiency, Electrodes, Metals, Sapphire, Temperature metrology, Heterojunctions

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Proceedings Article | 29 April 2016 Paper

Optical instrumentation systems for environmental and structural health monitoring based on the molecular condensation nuclei (MCN) detector

Vladimir Kuptsov, Vadim Ya. Katelevsky, Vladimir Valyukhov, Andrei Aladov

Proceedings Volume 9899, 98991X (2016) https://doi.org/10.1117/12.2224469

KEYWORDS: Photometry, Signal processing, Scattering

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Proceedings Article | 22 June 2015 Paper

The threshold sensitivity of the molecular condensation nuclei detector

Vladimir Kuptsov, Vadim Katelevsky, Vladimir Valyukhov

Proceedings Volume 9525, 95252N (2015) https://doi.org/10.1117/12.2184135

KEYWORDS: Aerosols, Atmospheric particles, Light scattering, Molecules, Sensors, Photometry, Scattering, Metals, Inspection, Photodetectors

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Molecular condensation nuclei (MCN) method is used in production engineering and process monitoring and relates to optical metrology methods of measuring the concentrations of various contaminants in the environment. Ultra high sensitivity of MCN method to a class of substances is determined by measuring the optical scattering aerosol particles, at the centers of which are located the detectable impurities molecules. This article investigates the influence of MCN manifestations coefficient (ratio of the concentration of aerosol particles to the concentration of molecules detectable impurities) on the sensitivity of the MCN detector. The MCN method is based on the application of various physicochemical processes to the flow of a gas containing impurities. As a result of these processes aerosol particle that are about 106 times larger than the original molecule of the impurity are produced. The ability of the aerosol particle to scatter incident light also increases ~10¹⁴ ÷10¹⁶ times compared with the original molecule and the aerosol particle with the molecule of the impurity in the center is easily detected by light scattering inside a photometer. By measuring of the light scattering intensity is determined concentration of chemical impurities in the air. An application nephelometric optical metrology scheme of light scattering by aerosol particles ensures stable operation of reliable and flexible measuring systems. Light scattering by aerosol particles is calculated on the basis of the Mie’s theory as aerosol particle sizes comparable to the wavelength of the optical radiation. The experimental results are shown for detectable impurities of metal carbonyls. Gas analyzers based on the MCN method find application in industries with the possibility of highly toxic emissions into the atmosphere (carbonyl technology of metal coatings and products, destruction of chemical weapons, etc.), during storage and transportation of toxic substances, as well as in the inspection of large-scale objects. There are some perspective areas of use MCN detector: prevention of illegal use of dangerous substances, revealing of their origin and leakage paths by means of marking with special non-radioactive chemical compounds; investigation of large-scale atmospheric circulation with the help of marking substances; nondestructive inspection for highly efficient filters with indicating agent concentration and for the inspection of the devices of high level tightness (heat-exchangers of fast nuclear reactors).

Proceedings Article | 5 May 2015 Paper

Optical sensors based on the molecular condensation nuclei detector

Vladimir Kuptsov, Vadim Katelevsky, Vladimir Valyukhov

Proceedings Volume 9506, 950620 (2015) https://doi.org/10.1117/12.2178594

KEYWORDS: Light scattering, Aerosols, Atmospheric particles, Sensors, Molecules, Photometry, Scattering, Photodetectors, Mie scattering, Particles

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Molecular condensation nuclei (MCN) detector is a specialized optical sensor which provides for monitoring of various chemicals impurity in the environment and diagnosis of diseases in human exhaled air ("electronic nose" biosensor). Structurally MCN detector is included in the highly sensitive gas analyzers based on MCN method. The article describes the fundamental principles, specific features and application fields of the advanced highly sensitive MCN method. The MCN method is based on the application of various physico-chemical processes to the flow of a gas containing impurities. As a result of these processes aerosol particle that are about 10⁶ times larger than the original molecule of the impurity are produced. The ability of the aerosol particle to scatter incident light also increases ~10¹⁴÷10¹⁶ times compared with the original molecule and the aerosol particle with the molecule of the impurity in the center is easily detected by light scattering inside a photometer. By measuring of the light scattering intensity is determined concentration of chemical impurities in the air. Aerosol particles in the MCN detector are formed in the condensing devices through overgrowth of the molecule detectable impurity by molecules so-called «developer» substance. At the final stage of the analysis in the MCN detector is measured light scattering by aerosol particles which is proportional to the concentration of determined impurities in the environment. For calculations of the scattered radiation is applicable Mie’s theory considering the scattering of light by spherical particles whose size is comparable to the wavelength of light. We have determined that the light scattering by aerosol particles is interferometric and is comparable within an order of magnitude with light scattering by the air inside a photometer. The detection threshold for the target component of the gas analyzer is attained at the spontaneous ionization background level and not at the limiting sensitivity level of the photodetector.

Proceedings Article | 5 September 2014 Paper

Light scattering by aerosol particles and air in the molecular condensation nuclei (MCN) detector

Vladimir Kuptsov, Vadim Katelevsky, Vladimir Valyukhov, Evgeniy Rybin

Proceedings Volume 9205, 92050Q (2014) https://doi.org/10.1117/12.2059832

KEYWORDS: Light scattering, Aerosols, Atmospheric particles, Scattering, Photometry, Molecules, Sensors, Photodetectors, Optical amplifiers, Chemical analysis

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