Pub Date : 2020-09-14DOI: 10.1109/EFRE47760.2020.9242162
E. Loktionov, E. Sharaborova, D. Sitnikov
Residual energy or thermal coupling coefficient shows what fraction of laser pulse energy is spent for target heating. High residual energy rates lead to low impact efficiency and sometimes to unwanted effects like phase transitions and chemical reactions. Experimental works on its measurement under nano- and femtosecond laser irradiation are not numerous but still can be found, while picosecond range is poorly studied. The latter is interesting since thermal coupling effects are close to ultrashort impact, while lasers efficiency, complexity, and price are closer to nanosecond devices. We used a calorimeter to evaluate heat flux through a target for focused and non-focused irradiation. Our data obtained for aluminum irradiated at 1064 nm, 71 ps, 15 Hz show higher residual energy rates than could be found in published sources: 2.5-3 times higher than calculated for 100 ps, ca. 1.25-fold higher than experimental evaluation for nano- and femtosecond impact. We assume that the difference may be due to a change in the actual absorptivity of the target upon repeated impact, the spatial shape of the beam (homogeneous or Gaussian), and the experimental methods used (target temperature or through the heat flux). The results obtained are highly novel and important for correct modeling of thermal coupling and adequate transition from laboratory to real systems using repetitively pulsed picosecond impacts.
{"title":"Residual Energy Measurement at Picosecond Laser Impact on Metals","authors":"E. Loktionov, E. Sharaborova, D. Sitnikov","doi":"10.1109/EFRE47760.2020.9242162","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242162","url":null,"abstract":"Residual energy or thermal coupling coefficient shows what fraction of laser pulse energy is spent for target heating. High residual energy rates lead to low impact efficiency and sometimes to unwanted effects like phase transitions and chemical reactions. Experimental works on its measurement under nano- and femtosecond laser irradiation are not numerous but still can be found, while picosecond range is poorly studied. The latter is interesting since thermal coupling effects are close to ultrashort impact, while lasers efficiency, complexity, and price are closer to nanosecond devices. We used a calorimeter to evaluate heat flux through a target for focused and non-focused irradiation. Our data obtained for aluminum irradiated at 1064 nm, 71 ps, 15 Hz show higher residual energy rates than could be found in published sources: 2.5-3 times higher than calculated for 100 ps, ca. 1.25-fold higher than experimental evaluation for nano- and femtosecond impact. We assume that the difference may be due to a change in the actual absorptivity of the target upon repeated impact, the spatial shape of the beam (homogeneous or Gaussian), and the experimental methods used (target temperature or through the heat flux). The results obtained are highly novel and important for correct modeling of thermal coupling and adequate transition from laboratory to real systems using repetitively pulsed picosecond impacts.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131602083","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 : 2020-09-14DOI: 10.1109/EFRE47760.2020.9242160
E. Trofimova, I. Romet, V. Pustovarov, M. Kirm, S. Omelkov, M. Bettinelli
The study deals with the investigation of luminescence properties and energy transfer processes in LiSrPO4 doped with Pr3+ and co-doped with Dy3+ or Sm3+. Ultraviolet (UV) and vacuum ultraviolet (VUV) excited emission and excitation spectra are studied, as well as pulsed cathodoluminescence spectra in wide temperature range 5–295 K. In both compounds, Pr3+ plays a role of a sensitizer of co-dopant ion emission in visible range via energy transfer processes. Studies of the photoluminescence excitation spectra show rather complex energy transfer mechanisms and defect emission influence on the emission spectra. The use of Pr3+ in pair with Dy3+, Sm3+ and other ions may enhance the luminescence properties of a compound via increased absorption in UV range, enhancing its suitability to be used as possible white light emitting diodes (W-LEDs) phosphors.
{"title":"Energy Transfer in LiSrPO4 Doped with Pr3+ and Co-Doped with Dy3+, Sm3+","authors":"E. Trofimova, I. Romet, V. Pustovarov, M. Kirm, S. Omelkov, M. Bettinelli","doi":"10.1109/EFRE47760.2020.9242160","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242160","url":null,"abstract":"The study deals with the investigation of luminescence properties and energy transfer processes in LiSrPO<sub>4</sub> doped with Pr<inf>3+</inf> and co-doped with Dy<inf>3+</inf> or Sm<inf>3+.</inf> Ultraviolet (UV) and vacuum ultraviolet (VUV) excited emission and excitation spectra are studied, as well as pulsed cathodoluminescence spectra in wide temperature range 5–295 K. In both compounds, Pr<inf>3+</inf> plays a role of a sensitizer of co-dopant ion emission in visible range via energy transfer processes. Studies of the photoluminescence excitation spectra show rather complex energy transfer mechanisms and defect emission influence on the emission spectra. The use of Pr<inf>3+</inf> in pair with D<sub>y</sub>3<inf>+</inf>, Sm<inf>3+</inf> and other ions may enhance the luminescence properties of a compound via increased absorption in UV range, enhancing its suitability to be used as possible white light emitting diodes (W-LEDs) phosphors.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116531732","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 : 2020-09-14DOI: 10.1109/EFRE47760.2020.9242062
M. Dorofeeva, Tatyana A. Gubaidulina, V. Sergeev, T. Dorofeeva
A modified surface layers with high resistance were successfully prepared on corrosion stainless steel by Ion Beam Implantation (IBI). These layers contain oxides of chromium, aluminum, iron, and boron. It was revealed that the implantation of oxygen and aluminum with boron has a positive effect to the characteristic of the formed layers. In order to confirm this phenomenon, scanning electron microscopy (SEM), secondary ion mass spectrometry (SIMS), X-ray photoelectron spectroscopy were carried out to investigate the morphology and composition of this layer after ion implantation process. The corrosion behavior of the implanted stainless steel was investigated in NaCl solution by electrochemical system and long-term salt spray (NSS) tests. The modified surface layer has been demonstrated to improve the corrosion resistance of stainless steels, even in the long standing corrosion influence. Finally, the corrosion of the stainless steel with implantation was discussed.
{"title":"Inffluence of Ion Beam Implantation on the Corrosion Properties of Stainless Steel","authors":"M. Dorofeeva, Tatyana A. Gubaidulina, V. Sergeev, T. Dorofeeva","doi":"10.1109/EFRE47760.2020.9242062","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242062","url":null,"abstract":"A modified surface layers with high resistance were successfully prepared on corrosion stainless steel by Ion Beam Implantation (IBI). These layers contain oxides of chromium, aluminum, iron, and boron. It was revealed that the implantation of oxygen and aluminum with boron has a positive effect to the characteristic of the formed layers. In order to confirm this phenomenon, scanning electron microscopy (SEM), secondary ion mass spectrometry (SIMS), X-ray photoelectron spectroscopy were carried out to investigate the morphology and composition of this layer after ion implantation process. The corrosion behavior of the implanted stainless steel was investigated in NaCl solution by electrochemical system and long-term salt spray (NSS) tests. The modified surface layer has been demonstrated to improve the corrosion resistance of stainless steels, even in the long standing corrosion influence. Finally, the corrosion of the stainless steel with implantation was discussed.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121875803","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 : 2020-09-14DOI: 10.1109/EFRE47760.2020.9242002
V. Soldatkin, Lola Yuldashova, Alena Shardina, Anastasiya Shkarupo, Tatiana Mikhalchenko
To create a semiconductor portable device for disinfection of water with ultraviolet radiation, in this work, we studied the effect on microorganisms in an aqueous medium by ultraviolet radiation of a quartz lamp and semiconductor diodes with wavelengths of 365 nm and 275 nm. It was found that for all radiation sources in experimental studies, the dependences of the number of microorganisms in an aqueous medium on the irradiation time have a parabolic function. This is due to the fact that at the first stage of irradiation, the protective functions of the cells of microorganisms are turned off, then disinfection is carried out in proportion to the irradiation time. Complete disinfection of microorganisms in an aqueous medium was carried out with a quartz lamp in 5 minutes, a UV diode with a wavelength of 365 nm in 30 minutes, and a UV diode with a wavelength of 275 nm in 7 minutes.
{"title":"Device for Water Disinfection by Ultraviolet Radiation","authors":"V. Soldatkin, Lola Yuldashova, Alena Shardina, Anastasiya Shkarupo, Tatiana Mikhalchenko","doi":"10.1109/EFRE47760.2020.9242002","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242002","url":null,"abstract":"To create a semiconductor portable device for disinfection of water with ultraviolet radiation, in this work, we studied the effect on microorganisms in an aqueous medium by ultraviolet radiation of a quartz lamp and semiconductor diodes with wavelengths of 365 nm and 275 nm. It was found that for all radiation sources in experimental studies, the dependences of the number of microorganisms in an aqueous medium on the irradiation time have a parabolic function. This is due to the fact that at the first stage of irradiation, the protective functions of the cells of microorganisms are turned off, then disinfection is carried out in proportion to the irradiation time. Complete disinfection of microorganisms in an aqueous medium was carried out with a quartz lamp in 5 minutes, a UV diode with a wavelength of 365 nm in 30 minutes, and a UV diode with a wavelength of 275 nm in 7 minutes.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127755382","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 : 2020-09-14DOI: 10.1109/EFRE47760.2020.9242071
A. Burachenko, V. Tarasenko, E. Baksht
The results of studies of the generation of runaway electron beams and X-ray radiation in an inhomogeneous electric field in air, nitrogen, argon and helium under the pressures from 1 to 100 kPa are presented. The high-voltage generator producing a voltage pulse with an amplitude up to 200 kV and a rise time of ~ 1.5 µs was used. A runaway electron beam in helium at a pressure of 100 kPa was recorded with a collector. In air, nitrogen, and argon, a runaway electron beam had relatively small amplitudes and energies, and was recorded by the collector only at low pressures (<20 kPa). X-ray radiation behind an aluminum foil anode for all four gases in the total pressure range was detected with a scintillator and a PMT. For a microsecond voltage rise time, it is necessary to use cathodes providing the highest voltage of the gap breakdown.
{"title":"Generation of Runaway Electrons and X-ray at a Microsecond Voltage Rise Time in Different Gases","authors":"A. Burachenko, V. Tarasenko, E. Baksht","doi":"10.1109/EFRE47760.2020.9242071","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242071","url":null,"abstract":"The results of studies of the generation of runaway electron beams and X-ray radiation in an inhomogeneous electric field in air, nitrogen, argon and helium under the pressures from 1 to 100 kPa are presented. The high-voltage generator producing a voltage pulse with an amplitude up to 200 kV and a rise time of ~ 1.5 µs was used. A runaway electron beam in helium at a pressure of 100 kPa was recorded with a collector. In air, nitrogen, and argon, a runaway electron beam had relatively small amplitudes and energies, and was recorded by the collector only at low pressures (<20 kPa). X-ray radiation behind an aluminum foil anode for all four gases in the total pressure range was detected with a scintillator and a PMT. For a microsecond voltage rise time, it is necessary to use cathodes providing the highest voltage of the gap breakdown.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128118674","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 : 2020-09-14DOI: 10.1109/EFRE47760.2020.9242132
K. Shunkeyev, L. Myasnikova, A. Maratova, K. Bizhanova
The study of the mechanisms of formation of radiation defects to ensure the transparency of optical materials under the influence of radiation, temperature and stress of various types of deformation is an urgent task at the present time. For this purpose, the mechanisms of formation of halogen centers (V2, V3, V4A) when the lattice symmetry is lowered by the light cation field (Na), plastic and elastic deformation in a KI, KCl and KBr crystals are studied. Absorption spectra of this crystals under X-ray irradiation in the isodose mode for 3 hours at 90 K, pre-doped with Na ions, undergo plastic deformation (4%) at room temperature and elastic deformation (1.5%) at 90 K. Lowering the lattice symmetry by light cations and plastic deformation of the KI, KCl and KBr crystals leads to an increase in radiation defect formation, elastic deformation – leads to a decrease in radiation defect formation, and therefore to an increase in luminescence.
{"title":"Mechanisms of Radiation Defect Formation in the KI Crystal in the Deformation Field","authors":"K. Shunkeyev, L. Myasnikova, A. Maratova, K. Bizhanova","doi":"10.1109/EFRE47760.2020.9242132","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242132","url":null,"abstract":"The study of the mechanisms of formation of radiation defects to ensure the transparency of optical materials under the influence of radiation, temperature and stress of various types of deformation is an urgent task at the present time. For this purpose, the mechanisms of formation of halogen centers (V2, V3, V4A) when the lattice symmetry is lowered by the light cation field (Na), plastic and elastic deformation in a KI, KCl and KBr crystals are studied. Absorption spectra of this crystals under X-ray irradiation in the isodose mode for 3 hours at 90 K, pre-doped with Na ions, undergo plastic deformation (4%) at room temperature and elastic deformation (1.5%) at 90 K. Lowering the lattice symmetry by light cations and plastic deformation of the KI, KCl and KBr crystals leads to an increase in radiation defect formation, elastic deformation – leads to a decrease in radiation defect formation, and therefore to an increase in luminescence.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132589568","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 : 2020-09-14DOI: 10.1109/EFRE47760.2020.9241931
A. Klimov, E. Oks, A. Zenin, I. Bakeev
Ceramic-metal composite materials are promising materials of modern high-tech production. They combine a number of unique properties inherent in both ceramics (hardness, high strength, low creep) and metal (high thermal conductivity, electrical conductivity, resistance to shock loads). The current stage of technology development requires both improving methods for creating such materials and searching for new methods for their production. In the present work, the results of electron beam sintering of a ceramic-metal compact by a focused beam in the medium vacuum pressure range are presented. It is shown that by heating the compacts it is possible to achieve a uniform distribution of elements over the volume of the sintered sample.
{"title":"Electron-Beam Sintering of Metalloceramic Materials in Medium Vacuum","authors":"A. Klimov, E. Oks, A. Zenin, I. Bakeev","doi":"10.1109/EFRE47760.2020.9241931","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9241931","url":null,"abstract":"Ceramic-metal composite materials are promising materials of modern high-tech production. They combine a number of unique properties inherent in both ceramics (hardness, high strength, low creep) and metal (high thermal conductivity, electrical conductivity, resistance to shock loads). The current stage of technology development requires both improving methods for creating such materials and searching for new methods for their production. In the present work, the results of electron beam sintering of a ceramic-metal compact by a focused beam in the medium vacuum pressure range are presented. It is shown that by heating the compacts it is possible to achieve a uniform distribution of elements over the volume of the sintered sample.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"49 Pt A 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134128906","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 : 2020-09-14DOI: 10.1109/EFRE47760.2020.9242164
E. Makhneva, Matěj Pastucha, L. Barillas, P. Skládal, Z. Farka, K. Fricke
Thin reactive polymer surfaces are attractive in the field of bio applications, in particular, when they have the ability to bind biomolecules while providing a great level of stability in aqueous environment. Plasma polymerization techniques enable a fast and eco-friendly procedure for the preparation of thin functional polymer films. In this paper we report on the generation of highly functional oxygen-rich plasma-polymerized (pp) coatings with great level of stability in water. A quartz crystal microbalance (QCM) biosensor was successfully developed by using a plasma polymer film as a matrix layer for antibody immobilization. The developed QCM biosensor presented a stable baseline during the measurements and exhibited selective and high response to the analyte.
{"title":"Oxygen-Rich Plasma-Polymerized Coatings for QCM Biosensing","authors":"E. Makhneva, Matěj Pastucha, L. Barillas, P. Skládal, Z. Farka, K. Fricke","doi":"10.1109/EFRE47760.2020.9242164","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242164","url":null,"abstract":"Thin reactive polymer surfaces are attractive in the field of bio applications, in particular, when they have the ability to bind biomolecules while providing a great level of stability in aqueous environment. Plasma polymerization techniques enable a fast and eco-friendly procedure for the preparation of thin functional polymer films. In this paper we report on the generation of highly functional oxygen-rich plasma-polymerized (pp) coatings with great level of stability in water. A quartz crystal microbalance (QCM) biosensor was successfully developed by using a plasma polymer film as a matrix layer for antibody immobilization. The developed QCM biosensor presented a stable baseline during the measurements and exhibited selective and high response to the analyte.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134172787","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 : 2020-09-14DOI: 10.1109/EFRE47760.2020.9242184
I. Datsko, N. Labetskaya, S. Chaikovsky, V. Van'kevich
The propagation of a nonlinear magnetic diffusion wave which arises in an electrical explosion of plane conductors occurring in a current skinning mode was investigated experimentally on a MIG generator (2.5 MA, 100 ns). The magnetic field induction was significantly greater than that necessary for the plate surface facing the electric field to explode. The loads configured as plane conductors were chosen to observe plasma formation on the back side of the plate. It was observed that on this side, under the given experimental conditions, 75 ns after the onset of current flow, a plasma channel formed in the region of the longitudinal axis of the plate. The pattern of channel formation was investigated in relation to the magnetic field strength and the plate width.
{"title":"Skin Electrical Explosion of Plane Copper Conductors","authors":"I. Datsko, N. Labetskaya, S. Chaikovsky, V. Van'kevich","doi":"10.1109/EFRE47760.2020.9242184","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242184","url":null,"abstract":"The propagation of a nonlinear magnetic diffusion wave which arises in an electrical explosion of plane conductors occurring in a current skinning mode was investigated experimentally on a MIG generator (2.5 MA, 100 ns). The magnetic field induction was significantly greater than that necessary for the plate surface facing the electric field to explode. The loads configured as plane conductors were chosen to observe plasma formation on the back side of the plate. It was observed that on this side, under the given experimental conditions, 75 ns after the onset of current flow, a plasma channel formed in the region of the longitudinal axis of the plate. The pattern of channel formation was investigated in relation to the magnetic field strength and the plate width.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114839190","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 : 2020-09-14DOI: 10.1109/EFRE47760.2020.9241907
E. Nefedtsev, S. Onischenko
The objects of experimental research were vacuum gaps (VGs) with electrochemically polished copper single-crystalline cathodes. VGs were exposed to short (20 ns) voltage pulses of high (200 kV) and low (25 kV) voltage amplitudes. The results indicate that plastic phenomena occurring inside the electrode material with the participation of linear defects of crystal structure play a significant role in the development of vacuum breakdown.
{"title":"Marks on Single-Crystal Copper Cathodes after Short-Pulse Voltage Impact on Vacuum Gaps","authors":"E. Nefedtsev, S. Onischenko","doi":"10.1109/EFRE47760.2020.9241907","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9241907","url":null,"abstract":"The objects of experimental research were vacuum gaps (VGs) with electrochemically polished copper single-crystalline cathodes. VGs were exposed to short (20 ns) voltage pulses of high (200 kV) and low (25 kV) voltage amplitudes. The results indicate that plastic phenomena occurring inside the electrode material with the participation of linear defects of crystal structure play a significant role in the development of vacuum breakdown.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"246 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123018345","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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