Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019518
A. Dubov, V. V. Dubov, S. Roshchupkin
The contemporary theoretical research focuses on the kinematics of the resonant spontaneous bremsstrahlung of ultrarelativistic electrons for the case of particles scattering on a nucleus in the presence of the external laser field. The energy spectrum of the observable electrons represents considerable magnitude gradation. The resonant state determines the emersion of the intermediate particle into the real. Therefore, the aftermath of the transition realizes the splitting of the second order process with accordance to the fine structure into two subsequent first order processes: the laser-assisted Mott scattering of an electron on a nucleus and the laser-stimulated Compton effects. Additionally, with the alteration of the combinational sequence of the described mechanisms the phenomenon indicates two possible reaction channels referring the Compton or Mott procedures to initiate the interaction. Furthermore, the evaluation of the system illustrates the essential dependency of the resonant frequency on the channel selection. The computational experiments demonstrate the linear specification of the resonant frequency by the emission angle of the spontaneous photon in the compound with Compton occurrence to develop originally in contrast to the option of the Mott appearance initiation to produce three various values for the resonant frequency level. In conclusion, the investigation calculates the differential cross sections of the resonance in comparison to the standard cross section estimated in the absence of the external field. Substantial quantity of scientific facilities with profile in pulsed laser radiation (SLAC, FAIR, XFEL, ELI, XCELS) may experimentally verify the project examination.
{"title":"Spontaneous bremsstrahlung of ultrarelativistic electrons within the resonant conditions in the field of a nucleus and external electromagnetic field","authors":"A. Dubov, V. V. Dubov, S. Roshchupkin","doi":"10.1109/CAOL46282.2019.9019518","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019518","url":null,"abstract":"The contemporary theoretical research focuses on the kinematics of the resonant spontaneous bremsstrahlung of ultrarelativistic electrons for the case of particles scattering on a nucleus in the presence of the external laser field. The energy spectrum of the observable electrons represents considerable magnitude gradation. The resonant state determines the emersion of the intermediate particle into the real. Therefore, the aftermath of the transition realizes the splitting of the second order process with accordance to the fine structure into two subsequent first order processes: the laser-assisted Mott scattering of an electron on a nucleus and the laser-stimulated Compton effects. Additionally, with the alteration of the combinational sequence of the described mechanisms the phenomenon indicates two possible reaction channels referring the Compton or Mott procedures to initiate the interaction. Furthermore, the evaluation of the system illustrates the essential dependency of the resonant frequency on the channel selection. The computational experiments demonstrate the linear specification of the resonant frequency by the emission angle of the spontaneous photon in the compound with Compton occurrence to develop originally in contrast to the option of the Mott appearance initiation to produce three various values for the resonant frequency level. In conclusion, the investigation calculates the differential cross sections of the resonance in comparison to the standard cross section estimated in the absence of the external field. Substantial quantity of scientific facilities with profile in pulsed laser radiation (SLAC, FAIR, XFEL, ELI, XCELS) may experimentally verify the project examination.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126160833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019577
L. Derzhypolska, A. Derzhypolskyi, A. Negriiko
In the work presented is the theoretical description of optimal focusing of extended laser beam at long distances (over 1km). It is shown that in general case the optimal focusing condition does not coincide with the condition of formation of laser beam waist. The approximation is formulated, when the optimal focusing coincides with the beam waist. Obtained is the theoretical and experimental confirmation of linear dependence of minimum diameter of focusing spot from the focusing distance.
{"title":"Peculiarities of propagation and long distance focusing of expanded Gaussian laser beams","authors":"L. Derzhypolska, A. Derzhypolskyi, A. Negriiko","doi":"10.1109/CAOL46282.2019.9019577","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019577","url":null,"abstract":"In the work presented is the theoretical description of optimal focusing of extended laser beam at long distances (over 1km). It is shown that in general case the optimal focusing condition does not coincide with the condition of formation of laser beam waist. The approximation is formulated, when the optimal focusing coincides with the beam waist. Obtained is the theoretical and experimental confirmation of linear dependence of minimum diameter of focusing spot from the focusing distance.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122912617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019561
O.U. Hoda, N. Yaremchuk
In this paper is analyzed the application of soft measurements to obtain quality characteristics or a complex quality index in hierarchical product quality structures. The procedure of combining the quality indicators of the lower level of the hierarchy with the characteristics of uncertainty in the quality indicators of the upper level of the hierarchy using an arithmetic mean, a weighted average, a median and the Walsh median is considered. The methods of uncertainty evaluation under soft measurement of quality characteristics are elaborated.
{"title":"The Methods of Uncertainty Evaluation under Measurement of Quality Characteristics with Hierarchical Structure","authors":"O.U. Hoda, N. Yaremchuk","doi":"10.1109/CAOL46282.2019.9019561","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019561","url":null,"abstract":"In this paper is analyzed the application of soft measurements to obtain quality characteristics or a complex quality index in hierarchical product quality structures. The procedure of combining the quality indicators of the lower level of the hierarchy with the characteristics of uncertainty in the quality indicators of the upper level of the hierarchy using an arithmetic mean, a weighted average, a median and the Walsh median is considered. The methods of uncertainty evaluation under soft measurement of quality characteristics are elaborated.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126815546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019465
S. P. Shary
We consider the data fitting problem under interval uncertainty and show that the problem reduces to the solution of interval systems of equations constructed from the data being processed. The paper discusses in detail the so-called strong compatibility of parameters and data, as more practical, more adequate to reality and possessing better theoretical properties. Estimates of function parameters that satisfy the strong compatibility conditions have polynomial computational complexity, are robust, and almost always have finite variability. The paper proposes a computational technology for solving the data fitting problem for linear function, under interval data uncertainty and taking into account the requirement of strong compatibility.
{"title":"Interval Methods for Data Fitting Under Imprecision and Uncertainty","authors":"S. P. Shary","doi":"10.1109/CAOL46282.2019.9019465","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019465","url":null,"abstract":"We consider the data fitting problem under interval uncertainty and show that the problem reduces to the solution of interval systems of equations constructed from the data being processed. The paper discusses in detail the so-called strong compatibility of parameters and data, as more practical, more adequate to reality and possessing better theoretical properties. Estimates of function parameters that satisfy the strong compatibility conditions have polynomial computational complexity, are robust, and almost always have finite variability. The paper proposes a computational technology for solving the data fitting problem for linear function, under interval data uncertainty and taking into account the requirement of strong compatibility.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127352292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019412
A. Ivanov, A. Sitkevich, S. Vasiliev
It is shown that in the course of laser processing with radiation flux density ~106 W/cm–2 in the external electric field with different polarity varying from 0 to 106 V/m-1 the change in the evolution features of the plasma torch at the surface of some metals (Cu, Al, Pb) at early stages is quantitative rather than qualitative. At the same time the characteristic size of the target material droplets carried out from the irradiated zone, becomes by several times smaller as the amplitude of the external electric field strength grows, independently of its polarity.
{"title":"Generation of particles during laser treating of metal in external electric field","authors":"A. Ivanov, A. Sitkevich, S. Vasiliev","doi":"10.1109/CAOL46282.2019.9019412","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019412","url":null,"abstract":"It is shown that in the course of laser processing with radiation flux density ~106 W/cm–2 in the external electric field with different polarity varying from 0 to 106 V/m-1 the change in the evolution features of the plasma torch at the surface of some metals (Cu, Al, Pb) at early stages is quantitative rather than qualitative. At the same time the characteristic size of the target material droplets carried out from the irradiated zone, becomes by several times smaller as the amplitude of the external electric field strength grows, independently of its polarity.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131358731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019455
V. Fitio, A. Bendziak, I. Yaremchuk, Y. Bobitski
Developed a method based on RCWA analysis of the diffraction of a laser beam with a finite cross-section on a grating. The method is effective in the occurrence of waveguide resonance in the grating and corresponds to the law of conservation of energy. The application of the method is demonstrated on the diffraction of the Gaussian laser beam.
{"title":"Diffraction of Gaussian laser beam with finite crosssection on a gtaing using RCWA","authors":"V. Fitio, A. Bendziak, I. Yaremchuk, Y. Bobitski","doi":"10.1109/CAOL46282.2019.9019455","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019455","url":null,"abstract":"Developed a method based on RCWA analysis of the diffraction of a laser beam with a finite cross-section on a grating. The method is effective in the occurrence of waveguide resonance in the grating and corresponds to the law of conservation of energy. The application of the method is demonstrated on the diffraction of the Gaussian laser beam.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"160 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115913533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019463
A. Yerokhin, Andrii Babii, Oleksii Turuta
In the paper, we present the 3D filtering method of surface approximation based on FT-smoothing proposed to estimate glacier thickness change. Our method based on ICESat/GLAS Altimetry Data and SRTM-DEM Data. Processed data of satellite measurements at the coordinate surface usually placed sparsely, collected in "Satellite track". For interpolation, we are using 2D membership function. This approach is kind of a generalization of the single-dimension method. The result provides estimated by RMSE, we have managed a number of fuzzy components for improving RMSE.
{"title":"Geoscience Laser Altimeter System sparse ICESat data processing based on F-transform","authors":"A. Yerokhin, Andrii Babii, Oleksii Turuta","doi":"10.1109/CAOL46282.2019.9019463","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019463","url":null,"abstract":"In the paper, we present the 3D filtering method of surface approximation based on FT-smoothing proposed to estimate glacier thickness change. Our method based on ICESat/GLAS Altimetry Data and SRTM-DEM Data. Processed data of satellite measurements at the coordinate surface usually placed sparsely, collected in \"Satellite track\". For interpolation, we are using 2D membership function. This approach is kind of a generalization of the single-dimension method. The result provides estimated by RMSE, we have managed a number of fuzzy components for improving RMSE.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"319 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115255048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019430
N. Gomidze, K. Makharadze, I. Jabnidze, L. Kalandadze, M. Khajishvili, O. Nakashidze
The goal of the work is to study the characteristics detected of a fluorescence signal during the passage of a Gaussian laser beam through an optically dense phase screen. Numerical experiments are based on the matrix theory of a partially coherent beam and the property of a random phase screen with a variable thickness. The main characteristics of the detected signal are the mutual coherent function of the partially coherent beams, the scintillation index, the relative radius of the detected beam, etc., which are calculated under the condition of weak fluctuations of the phase screen. The practical significance of the work is about improving the quality of the characteristics of the detected signal at diagnosing an optically dense medium, such as aquatic environments with fluorescent impurities (various organic substances, oil, etc.).
{"title":"To the Diagnostics of Optically Dense Media via Phase Screen Model","authors":"N. Gomidze, K. Makharadze, I. Jabnidze, L. Kalandadze, M. Khajishvili, O. Nakashidze","doi":"10.1109/CAOL46282.2019.9019430","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019430","url":null,"abstract":"The goal of the work is to study the characteristics detected of a fluorescence signal during the passage of a Gaussian laser beam through an optically dense phase screen. Numerical experiments are based on the matrix theory of a partially coherent beam and the property of a random phase screen with a variable thickness. The main characteristics of the detected signal are the mutual coherent function of the partially coherent beams, the scintillation index, the relative radius of the detected beam, etc., which are calculated under the condition of weak fluctuations of the phase screen. The practical significance of the work is about improving the quality of the characteristics of the detected signal at diagnosing an optically dense medium, such as aquatic environments with fluorescent impurities (various organic substances, oil, etc.).","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115288886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019433
Gevelyuk S. A., Grinevych V. S., Doycho I. K., Lepikh Ya.I., Filevska L. M.
The features of luminescent properties of tin dioxide in the form of an ensemble of nanoparticles within the matrix of porous silicate glass with column structure are studied. The ensemble was formed by impregnating the glass with an alcoholic solution of SnCl4 followed by annealing. The type of glass and concentration of the impregnating solution, which corresponds to the best luminescent response, is established. The results of the work may be applied for the production of fluorescent gas sensors based on SnO2.
{"title":"Photoluminescence of SnO2 nanoparticle ensemble in porous glass with column structure","authors":"Gevelyuk S. A., Grinevych V. S., Doycho I. K., Lepikh Ya.I., Filevska L. M.","doi":"10.1109/CAOL46282.2019.9019433","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019433","url":null,"abstract":"The features of luminescent properties of tin dioxide in the form of an ensemble of nanoparticles within the matrix of porous silicate glass with column structure are studied. The ensemble was formed by impregnating the glass with an alcoholic solution of SnCl4 followed by annealing. The type of glass and concentration of the impregnating solution, which corresponds to the best luminescent response, is established. The results of the work may be applied for the production of fluorescent gas sensors based on SnO2.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124821342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019445
A. Sizhuk, K. Dorfman, C. H. Raymond Ooi
The spatial inhomogeneity of absorption coefficient of the space between mirrors, filled by an optically active gas, is analyzed in quantum optical terms. It was theoretically shown, that the quantization of electromagnetic field in a cavity (optical resonator) can reveal the spatial inhomogeneity of absorption or re-emission ability of the optically active medium. It appears from the analytical calculations, the inhomogeneity is caused by the Doppler frequency shifts (including recoil effects) during the atom-photon collisions and the non-zero initial frequency width of the scanning signal. The proposed analytical representation of the absorption coefficient through the additive quantum optical terms gives deeper insight into intrinsic processes in the interacting with light matter.
{"title":"Spatial inhomogeneity of the absorption and re-emission properties of an optically active medium in a resonator","authors":"A. Sizhuk, K. Dorfman, C. H. Raymond Ooi","doi":"10.1109/CAOL46282.2019.9019445","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019445","url":null,"abstract":"The spatial inhomogeneity of absorption coefficient of the space between mirrors, filled by an optically active gas, is analyzed in quantum optical terms. It was theoretically shown, that the quantization of electromagnetic field in a cavity (optical resonator) can reveal the spatial inhomogeneity of absorption or re-emission ability of the optically active medium. It appears from the analytical calculations, the inhomogeneity is caused by the Doppler frequency shifts (including recoil effects) during the atom-photon collisions and the non-zero initial frequency width of the scanning signal. The proposed analytical representation of the absorption coefficient through the additive quantum optical terms gives deeper insight into intrinsic processes in the interacting with light matter.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121498963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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