IR Thermographic System Supplied with an Ordered Fiber Bundle for Investigation of Power Engineering Equipment and Units

In this article, the authors propose an IR imaging system, supplied with an IR bundle of ordered silver halide fibers, for the acquisition of 2D temperature field distribution in hard-to-reach places. We assessed crosstalk between neighboring individual fibers of the bundle, carried out calibration of the IR imaging system, and determined modelled defects using this system. The results showed the applicability of the system for the inspection and investigation of power engineering units. Keywords: IR fiber bundles, IR thermography, internal defects detectio

Fiber-optical system for FTIR spectrometer with diamond ATR unit based on AgBr-(KRS-5) fibers

Разработан и изготовлен опытный образец волоконно-оптической системы к ИК-Фурье спектрометру с алмазной НПВО приставкой на основе световодов AgBr-(КРС-5). Преимущества этой системы связаны с расширенным диапазоном пропускания до 41,6 мкм (по сравнению с известными оптическими волокнами), увеличенной фотостойкостью, уменьшенными оптическими потерями на длине волны 10,6 мкм вследствие введения КРС-5 в решетку исходных галогенидов серебра. Предполагаемое использование результатов и продукции: в ИК-спеткроскопии, где необходим онлайн мониторинг химических реакций и процессов при агрессивных условиях среды (производство удобрений, фармацевтическая и нефтехимическая промышленность).The pre-production model of fiber-optical system for FTIR spectrometer with diamond ATR unit based on AgBr-(KRS-5) fibers was developed and manufactured. Advantages of AgBr-(KRS-5) system are concerned with transparence range, expanded up to 41,5 µm (in comparison with well-known optical fibers), increased photostability, reduced optical losses at 10,6 µm due to KRS-5 introduction into parental silver halide lattice. Prospective application of results and output: in IR spectroscopy, where the chemical reaction and process on-line monitoring is needed in aggressive ambient (fertilizer production, pharmaceutical and petrochemical industries).Программа развития УрФУ на 2013 год (п.2.1.2.1

The effect of humic acids on the natural resistance of the body of broiler chickens and the quality of their meat

ArticleThe aim of the work is to study the effectiveness of the concentration of humic acids of Reasil Humic Vet feed additive on the increase of the feed bioavailability for poultry and the probability of its negative impact on the safety and marketable characteristics of the final product. Studies were conducted on the basis of the Saratov State Agrarian University in two similar groups of broiler chickens ‘Cobb 500’, 100 heads each. Poultry feeding consisted of the same complete feed, but the drinking water for the broilers of the experimental group was enriched by humates in the amount of 0.5 ml L -1 . Based on the data obtained by daily weighing of the poultry and considering the feed intake, a positive trend of the influence of the feed additive on the average daily weight gain and feed conversion per unit of production was noted. The results of slaughter and anatomical cutting of broiler carcasses revealed that metabolic processes were more active in the body of an experimental poultry, reflected in the intensive growth of muscle tissue and fat deposition, which contributed to an increase in the yield of edible parts from carcasses by 9.9%. Studies of composition of broiler blood indicate non-toxicity of the recommended concentration of humates in the feed additive, its stimulation of non-specific resistance of the organism, contributing to the functioning of the immune system and the development of internal organs and, as a consequence, ensuring the safety of the products obtained from them

Transmission of thermal imaging by using infrared bundle based on silver halide solid solution

In this study, infrared bundle consisting of seven single fibres was manufactured. Experiences on transmission of the heated object thermal image was performed. The experimental data show that there is a fundamental possibility of thermal image transmission through the infrared bundle. © Published under licence by IOP Publishing Ltd

Optical Fibers Based on Modified Silver Halide Crystals for Nuclear Power

We investigated the possibility of the deployment of AgBr – TlBr0.46I0.54MIR fibers in high ionizing radiation environment. For this purpose, we exposed plate samples made of AgBr – TlBr0.46I0.54crystals to β-ionizing radiation at a dose of 100 kGy. We revealed the radiation-induced translucence effect for these materials and assumed its nature. As the investigation showed the suitability of the fibers for the application in high ionizing radiation environment, the authors propose to use these fibers jointly with FTIR spectrometers for the online monitoring of various chemical processes at the nuclear power plants. Keywords: modified silver halides, MIR fibers, FTIR spectroscopy, ionizing radiation resistanc

Infrared fiber-optical sensor for determining the composition of technical environment in energy

In this paper, we present a fiber-optic diode laser sensor with infrared light guides based on silver halide halides and thallium iodide for measuring and controlling the composition and temperature of various technical solid, liquid and gaseous substances. The sensor allows measurements in hard-to-reach places and severe operating conditions of devices: at low temperatures, vibrations and high pressures, which makes its application promising for the energy.В работе представлен волоконно-оптический датчик с ИК-световодами на основе кристаллов AgBr-TlI для измерения и контроля состава и температуры различных технических веществ и твердых тел. Датчик позволяет осуществлять измерения бесконтактным способом в изолированных местах и тяжелых условиях эксплуатации устройств: при низких температурах, вибрациях и высоких давлениях, что делает его применение перспективным для отрасли энергетики

Infrared fiber based on AgCl-AgBr and AgBr-TlI crystals to transfer thermal radiation in pulsed

The our research objective is to study IR energy transfer in pulsed and continuous mode through optical fibers produced from crystals of silver halide and a monovalent thallium solid solutions. It is assumed that the transfer of infrared radiation in the pulsed mode will significantly reduce losses. We designed the experimental setup, determined its operational parameters, and obtained the dependence of the detector's received radiation on the frequency of the pulses of thermal radiation. As a research subjects we used two different fibers compositions namely AgCl0.25Br0.75 and Ag0.95Tl0.05Br0.95I0.05. © Published under licence by IOP Publishing Ltd.Council on grants of the President of the Russian Federation: SP-2455.2018.1The research has been supported by the grants of President of the Russian Federation SP-2455.2018.1

Investigating the light stability of solid-solution-based AgCl-AgBr and AgBr-TlI crystals

For the development of mid-infrared fiber-optical elements, one needs light-stable, flexible materials that are transparent within this spectral band. Solid solutions of silver and monadic thallium halides prove to be the most suitable crystalline media for these needs. We study the light stability variation of high-purity AgCl1-xBrx(0 ≤ x ≤ 1) and Ag1-xTlxBr1-xIx (0 ≤ x ≤ 0.05) crystals by measuring the optical transmission change as functions of the composition and UV exposure time. The former is executed in a broad spectral range from 6500 - 350 cm-1, within which we choose three wavelengths to trace the transmission change. For thalliummonoiodide-containing samples, an effect is observed that we assumed to be translucence. © 2016 Chinese Optics Letters

Spectral oil analyzer

We worked out a spectral oil analyzer, implemented the method of Fourier transform infrared spectroscopy, which allow simultaneous detecting characteristic peaks of water absorption and sulfur-containing substances in oil within the wavelength range from 0.2 to 25.0 μm. The usage of fiber-optic delivering channels makes it possible to produce online industrial probes for the control of chemical composition and concentration, what is demanded at oil producing platforms and oil refinery plants. As identifiers, we used the most intense absorption peaks of water (λ - 1.45 μm, 1.95 μm, 3.00 μm, 6.00 μm), oil (λ - 1.72 μm, 2.31 μm, 3.41 μm) and sulfur-containing heterocycles (λ - 8.00 μm). The spectral analyzer consists of a broadband-light source, a flow-cell, a fiber-optic assembly, narrow-band optical filters and photodetectors. For delivering a broadband optical signal, a fiber-optic assembly was developed. It comprises silica fibers and polycrystalline fibers derived from solid solutions of silver and thallium (I) halides. It was calculated the effective area and diameter of each fiber type in the assembly, taking into account attenuation coefficients and overall optical losses of the system. Using eight channels for the probe at the same time, we were able to measure the content of water and sulfur-containing substances in oil in concentrations from 0.1 to 100.0 wt %. © Published under licence by IOP Publishing Ltd.Russian Science Foundation, RSF: 18-73-10063This work was supported by the Russian Science Foundation under grant No. 18-73-10063

Thermal Conductivity Measurement of Infrared Optical Fibers Based on Silver Halide Solid Solution Crystals

The aim of the study is to measure the thermal conductivity of silver halide light guides based on crystals of the AgCl-AgBr system used in PSD production technologies. The conductivity temperature coefficient of the samples under study were determined by the laser flash method using the LFA 467 (Hyper Flash) installation. We studied mono- and polycrystalline samples of solid solutions with the composition AgCl0,25AgBr0,75 in the temperature range 298–523 K. The thermal conductivity of the investigated materials was then calculated using literature data on density and heat capacity. The thermal conductivity coefficient ranges from 0.80±0,04 to 0.53±0,03 (W/m·K), depending on the microstructure of the sample. © 2021 Institute of Physics Publishing. All rights reserved.The research has been supported by the grants of President of the Russian Federation, MD-5324.2021.4