Peculiarities of the Bragg diffraction of light in a periodically inhomogeneous acoustic field are studied. Different variants of amplitude and phase spatial modulation of the acoustic field are analyzed. Amplitude, angular and frequency characteristics are calculated for case of strong acousto-optic interaction.
{"title":"ANALYSIS OF BRAGG DIFFRACTION OF LIGHT IN PERIODICALLY INHOMOGENEOUS ACOUSTIC FIELD","authors":"A. N. Vostrikova, V. Balakshy","doi":"10.1051/JP4:2006137035","DOIUrl":"https://doi.org/10.1051/JP4:2006137035","url":null,"abstract":"Peculiarities of the Bragg diffraction of light in a periodically inhomogeneous acoustic field are studied. Different variants of amplitude and phase spatial modulation of the acoustic field are analyzed. Amplitude, angular and frequency characteristics are calculated for case of strong acousto-optic interaction.","PeriodicalId":14838,"journal":{"name":"Journal De Physique Iv","volume":"107 1","pages":"169-173"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74849006","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}
M. Chirtoc, J. Gibkes, J. Antoniow, J. Henry, E. Neubauer, B. Bein, J. Pelzl
We introduce the theoretical description of 3ω signal from the Wollaston probe of a scanning thermal microscope (SThM) in terms of an equivalent low-pass filter. We performed thermal conductivity k measurements with lateral resolution of about 100 nm. The first application concerns NiTi shape memory alloys microstructured by focused ion beam implantation. Local martensite to austenite structural phase transition has been identified upon heating the sample from room temperature to 100°C The 3w signal changes were -1.95% in amplitude and 0.6° in phase, corresponding to thermal conductivity k increase of 3.5%. The second application consists of static measurement of local k on points situated on flat faces of bare diamond crystallites 300 μm in diameter, and on crystallites coated with Cr, Cu and Cu/Cr layers with thickness in the range 0.5-30 μm. The high k advantage of bare crystallites is lost upon coating the particles, but the thermal barrier depends also on the specific configuration when the particles are in contact to one another in materials obtained from such powders.
{"title":"Sensing thermal conductivity and structural effects at the nanoscale by scanning thermal microscopy (SThM)","authors":"M. Chirtoc, J. Gibkes, J. Antoniow, J. Henry, E. Neubauer, B. Bein, J. Pelzl","doi":"10.1051/JP4:2006137053","DOIUrl":"https://doi.org/10.1051/JP4:2006137053","url":null,"abstract":"We introduce the theoretical description of 3ω signal from the Wollaston probe of a scanning thermal microscope (SThM) in terms of an equivalent low-pass filter. We performed thermal conductivity k measurements with lateral resolution of about 100 nm. The first application concerns NiTi shape memory alloys microstructured by focused ion beam implantation. Local martensite to austenite structural phase transition has been identified upon heating the sample from room temperature to 100°C The 3w signal changes were -1.95% in amplitude and 0.6° in phase, corresponding to thermal conductivity k increase of 3.5%. The second application consists of static measurement of local k on points situated on flat faces of bare diamond crystallites 300 μm in diameter, and on crystallites coated with Cr, Cu and Cu/Cr layers with thickness in the range 0.5-30 μm. The high k advantage of bare crystallites is lost upon coating the particles, but the thermal barrier depends also on the specific configuration when the particles are in contact to one another in materials obtained from such powders.","PeriodicalId":14838,"journal":{"name":"Journal De Physique Iv","volume":"88 1","pages":"265-271"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90575778","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}
Modifications of a measuring set for measurements of the speed of sound in liquids under elevated pressures are described. The reliability of the proposed experimental device was checked under pressures up to 100 MPa in the temperature range from 293 K to 318 K.
{"title":"Modifications of a high pressure device for speed of sound measurements in liquids","authors":"M. Dzida, M. Chorążewski, M. Zorȩbski, R. Mańka","doi":"10.1051/JP4:2006137042","DOIUrl":"https://doi.org/10.1051/JP4:2006137042","url":null,"abstract":"Modifications of a measuring set for measurements of the speed of sound in liquids under elevated pressures are described. The reliability of the proposed experimental device was checked under pressures up to 100 MPa in the temperature range from 293 K to 318 K.","PeriodicalId":14838,"journal":{"name":"Journal De Physique Iv","volume":"78 1","pages":"203-207"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77199342","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}
The paper presents the results of theoretical analysis of the propagation of the electromagnetic field in optical fiber with an elliptic core. Due to the elliptic symmetry of the core the analysis had to be carried out in an elliptic coordinate system. This analysis has shown that the functions describing the z-component of the electric field satisfy the Mathieu equations. The presented results of the theoretical analysis are original and have not published so for.
{"title":"Some aspects of theoretical analysis of the light propagation in an elliptical optical fiber","authors":"T. Pustelny, L. Przybylski, K. Barczak","doi":"10.1051/JP4:2006137029","DOIUrl":"https://doi.org/10.1051/JP4:2006137029","url":null,"abstract":"The paper presents the results of theoretical analysis of the propagation of the electromagnetic field in optical fiber with an elliptic core. Due to the elliptic symmetry of the core the analysis had to be carried out in an elliptic coordinate system. This analysis has shown that the functions describing the z-component of the electric field satisfy the Mathieu equations. The presented results of the theoretical analysis are original and have not published so for.","PeriodicalId":14838,"journal":{"name":"Journal De Physique Iv","volume":"28 1","pages":"145-148"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85500353","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}
Cryptomelane type manganese oxides were prepared by the redox precipitation method. Modified materials were obtained by the direct introduction of silver to the synthesis mixture or by impregnation of the obtained oxides. The structure of the oxides was investigated by the FT-IR and FT-IR/PAS methods. It was found that the presence of silver in the synthesis conditions of manganese oxides caused partial replacement of potassium from the channels and distortion of the cryptomelane structure. In the impregnating samples silver was located on the outer surface of the oxides grains. FT-IR and FT-IR/PAS studies revealed different nature of bulk and surface interactions in the samples.
{"title":"FT-IR/PAS studies of the silver modified manganese oxides","authors":"W. Gac","doi":"10.1051/JP4:2006137055","DOIUrl":"https://doi.org/10.1051/JP4:2006137055","url":null,"abstract":"Cryptomelane type manganese oxides were prepared by the redox precipitation method. Modified materials were obtained by the direct introduction of silver to the synthesis mixture or by impregnation of the obtained oxides. The structure of the oxides was investigated by the FT-IR and FT-IR/PAS methods. It was found that the presence of silver in the synthesis conditions of manganese oxides caused partial replacement of potassium from the channels and distortion of the cryptomelane structure. In the impregnating samples silver was located on the outer surface of the oxides grains. FT-IR and FT-IR/PAS studies revealed different nature of bulk and surface interactions in the samples.","PeriodicalId":14838,"journal":{"name":"Journal De Physique Iv","volume":"19 1","pages":"283-286"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86036027","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}
The ONDRAF/NIRAS agency for radioactive waste and enriched fissile materials is in charge of the management of the radioactive wastes in Belgium. In the framework of the study of a new concept for the disposal of high level wastes, a project of a supercontainer has been considered and studied. The main goal of this study was to estimate the Thermo-Hydrological behaviour of the concrete buffer in service life. Water (liquid and vapour) and heat transfers were described through coupled differential equations by the means of the procedure THYDR developed at the Department of Physico-Chemistry of the French Commission for Atomic Energy (CEA/DPC) and implemented in the code CAST3M. Two different configurations for the concrete buffer were investigated: concrete cured with no water loss or partially dried. The simulations allowed the estimation of the evolution of both vapour pressure and liquid saturation.
{"title":"The Belgian supercontainer concept: Study of the concrete buffer behaviour in service life","authors":"S. Poyet","doi":"10.1051/JP4:2006136018","DOIUrl":"https://doi.org/10.1051/JP4:2006136018","url":null,"abstract":"The ONDRAF/NIRAS agency for radioactive waste and enriched fissile materials is in charge of the management of the radioactive wastes in Belgium. In the framework of the study of a new concept for the disposal of high level wastes, a project of a supercontainer has been considered and studied. The main goal of this study was to estimate the Thermo-Hydrological behaviour of the concrete buffer in service life. Water (liquid and vapour) and heat transfers were described through coupled differential equations by the means of the procedure THYDR developed at the Department of Physico-Chemistry of the French Commission for Atomic Energy (CEA/DPC) and implemented in the code CAST3M. Two different configurations for the concrete buffer were investigated: concrete cured with no water loss or partially dried. The simulations allowed the estimation of the evolution of both vapour pressure and liquid saturation.","PeriodicalId":14838,"journal":{"name":"Journal De Physique Iv","volume":"182 1","pages":"167-175"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83022317","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}
The results of acoustic and volumetric investigations of binary liquid mixtures of 1,3-butanediol with 1 -pentanol at the temperatures (298.15, 308.15, and 318.15) K are presented. Basing on the phase speed of ultrasound values (measured by the pulse-echo-overlap method at 2.18 MHz) and densities, the excess values of the molar volume and isentropic compressibility (volume-specific and molar), were calculated. Their composition dependencies were expressed by Redlich-Kister polynomials. It turned out that mixing of 1,3-butanediol with 1-pentanol, results in an enhanced rigidity of the mixtures in comparison with that of the pure components. What is more, this rigidity increases with increasing temperature. At the same time the volume effects (expansion) upon mixing increase with increasing temperature too. The results are discussed in terms of the variations of the structure and molecular interactions.
{"title":"Acoustic and volumetric studies of binary mixtures of 1,3-butanediol + 1-pentanol","authors":"E. Zorȩbski","doi":"10.1051/JP4:2006137049","DOIUrl":"https://doi.org/10.1051/JP4:2006137049","url":null,"abstract":"The results of acoustic and volumetric investigations of binary liquid mixtures of 1,3-butanediol with 1 -pentanol at the temperatures (298.15, 308.15, and 318.15) K are presented. Basing on the phase speed of ultrasound values (measured by the pulse-echo-overlap method at 2.18 MHz) and densities, the excess values of the molar volume and isentropic compressibility (volume-specific and molar), were calculated. Their composition dependencies were expressed by Redlich-Kister polynomials. It turned out that mixing of 1,3-butanediol with 1-pentanol, results in an enhanced rigidity of the mixtures in comparison with that of the pure components. What is more, this rigidity increases with increasing temperature. At the same time the volume effects (expansion) upon mixing increase with increasing temperature too. The results are discussed in terms of the variations of the structure and molecular interactions.","PeriodicalId":14838,"journal":{"name":"Journal De Physique Iv","volume":"14 1","pages":"237-241"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87779180","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}
Numerous studies have been already carried out to study the chloride threshold value for depassivation of the steel embedded in concrete. Most of them were based on natural penetration of chlorides, whose main disadvantage is that it is very time consuming and makes necessary a long time to obtain reliable data. Other methods used are the potentiostatic tests that, depending on the potential applied, may also take very long. Recently, an accelerated method to determine the threshold value of corrosion of steel by application of electrical fields has been developed. In this paper, results obtained, for the same concrete, using every method are given as well as a comparison of the advantages and drawbacks of each of them.
{"title":"Comparison between several methods for determining the depassivation threshold value for corrosion onset","authors":"P. Viedma, M. Castellote, C. Andrade","doi":"10.1051/JP4:2006136009","DOIUrl":"https://doi.org/10.1051/JP4:2006136009","url":null,"abstract":"Numerous studies have been already carried out to study the chloride threshold value for depassivation of the steel embedded in concrete. Most of them were based on natural penetration of chlorides, whose main disadvantage is that it is very time consuming and makes necessary a long time to obtain reliable data. Other methods used are the potentiostatic tests that, depending on the potential applied, may also take very long. Recently, an accelerated method to determine the threshold value of corrosion of steel by application of electrical fields has been developed. In this paper, results obtained, for the same concrete, using every method are given as well as a comparison of the advantages and drawbacks of each of them.","PeriodicalId":14838,"journal":{"name":"Journal De Physique Iv","volume":"42 10","pages":"79-88"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72604688","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}
In this paper the experimental values of acoustical parameters determined from ultrasonic spectroscopy for eleven Kneser liquids are presented. The experimental data give the possibility to calculate several values describing acoustical relaxation. From these results it was possible to conclude that in the relaxation process with one relaxation time all vibrational degrees of freedom take part.
{"title":"Acoustical investigation of classical Kneser liquids","authors":"B. Linde, N. B. Lezhnev","doi":"10.1051/JP4:2006137044","DOIUrl":"https://doi.org/10.1051/JP4:2006137044","url":null,"abstract":"In this paper the experimental values of acoustical parameters determined from ultrasonic spectroscopy for eleven Kneser liquids are presented. The experimental data give the possibility to calculate several values describing acoustical relaxation. From these results it was possible to conclude that in the relaxation process with one relaxation time all vibrational degrees of freedom take part.","PeriodicalId":14838,"journal":{"name":"Journal De Physique Iv","volume":"86 1","pages":"213-218"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79546159","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}
In this paper a method of analysis of sensibility of layered structure thermal impedance for changing of selected parameters values was presented. The parameters analysed were relative thickness of layer and quotient of effusivities of adjoined layers. The TLM method was used for the calculations.
{"title":"Investigation of sensibility of temperature response on selected parameters of multilayer structure","authors":"Z. Suszyński, P. Majchrzak, L. Majchrzak","doi":"10.1051/JP4:2006137067","DOIUrl":"https://doi.org/10.1051/JP4:2006137067","url":null,"abstract":"In this paper a method of analysis of sensibility of layered structure thermal impedance for changing of selected parameters values was presented. The parameters analysed were relative thickness of layer and quotient of effusivities of adjoined layers. The TLM method was used for the calculations.","PeriodicalId":14838,"journal":{"name":"Journal De Physique Iv","volume":"27 1","pages":"353-356"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78997390","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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