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Analysis of Supercavities Formed in Water by a Group of Strikers during High-Speed Motion 分析高速运动过程中一组击剑在水中形成的超级空洞
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023170108
A. N. Ishchenko, V. V. Burkin, A. S. D’yachkovskii, A. V. Chupashev, A. Yu. Sammel’, K. S. Rogaev, A. D. Sidorov
{"title":"Analysis of Supercavities Formed in Water by a Group of Strikers during High-Speed Motion","authors":"A. N. Ishchenko, V. V. Burkin, A. S. D’yachkovskii, A. V. Chupashev, A. Yu. Sammel’, K. S. Rogaev, A. D. Sidorov","doi":"10.1134/s1063785023170108","DOIUrl":"https://doi.org/10.1134/s1063785023170108","url":null,"abstract":"<p><b>Abstract</b>—The analysis of supercavities formed during the high-speed motion in water of two closely spaced supercavitating strikers is performed. By comparing geometric characteristics of supercavities, the possibility of qualitative assessment of influence degree of closely spaced strikers on each other is shown. By the example of two strikers, the characteristic distance between them was determined, at which the minimum mutual influence of the strikers on each other is observed.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"4 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Elastic Interaction of Quantum Disks in Hybrid QD/NW Structures 混合 QD/NW 结构中量子盘的弹性相互作用
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180177
A. E. Romanov, A. L. Kolesnikova, M. Yu. Gutkin, V. E. Bougrov
{"title":"Elastic Interaction of Quantum Disks in Hybrid QD/NW Structures","authors":"A. E. Romanov, A. L. Kolesnikova, M. Yu. Gutkin, V. E. Bougrov","doi":"10.1134/s1063785023180177","DOIUrl":"https://doi.org/10.1134/s1063785023180177","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The elastic interaction of quantum disks (QDs) in a nanowire (NW), i.e., in a hybrid QD/NW structure with sharp heterointerfaces, is considered for the first time. Within the framework of the defect micromechanics approach, the energy of QD pair interaction is established and it is demonstrated that for QDs with a lattice misfit of the same sign, a zone of attraction to each other appears, depending on the ratio of the QD axial size to the NW radius. The discovered effect should be taken into account when choosing the modes of formation of hybrid QD/NW structures and in models explaining their properties.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"12 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination of Thickness and Doping Features of Multilayer 4H-SiC Structures by Frequency Analysis of IR Reflection Spectra 通过红外反射光谱的频率分析确定多层 4H-SiC 结构的厚度和掺杂特征
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180013
A. V. Afanasjev, V. I. Zubkov, V. A. Ilyin, V. V. Luchinin, M. V. Pavlova, M. F. Panov, V. V. Trushliakova, D. D. Firsov
{"title":"Determination of Thickness and Doping Features of Multilayer 4H-SiC Structures by Frequency Analysis of IR Reflection Spectra","authors":"A. V. Afanasjev, V. I. Zubkov, V. A. Ilyin, V. V. Luchinin, M. V. Pavlova, M. F. Panov, V. V. Trushliakova, D. D. Firsov","doi":"10.1134/s1063785023180013","DOIUrl":"https://doi.org/10.1134/s1063785023180013","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A technique has been developed for frequency analysis of the IR reflection spectrum to determine the thickness and order of the layers in the epitaxial structure of silicon carbide. Calculations for the 4<i>H</i>-SiC epitaxial structure have been performed. The method has been shown to be highly sensitive to optical boundaries resulting from a sequential increase in the doping level during the layer growth.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"11 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of the Parameters of a Self-Focused Electron Beam Outputted Behind the Anode of a Vacuum Diode 真空二极管阳极后输出的自聚焦电子束参数研究
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180141
V. I. Oleshko, V. V. Nguyen
{"title":"Investigation of the Parameters of a Self-Focused Electron Beam Outputted Behind the Anode of a Vacuum Diode","authors":"V. I. Oleshko, V. V. Nguyen","doi":"10.1134/s1063785023180141","DOIUrl":"https://doi.org/10.1134/s1063785023180141","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The parameters of a high-current electron beam extracted from the self-focusing zone through a hole in the anode into a vacuum chamber are investigated. The beam parameters were determined from the measurement of the spatial distribution of destruction and glow arising in polymethyl methacrylate samples installed at different distances from the anode (electron beam autographs). The formation of two electron beams—a self-focused with a high energy density, propagating along the axis of the cone facing the base to the anode with an apex angle of ~7° and a high-energy beam of low density, propagating in a hollow truncated cone and surrounding self-focused, was found. The oscillograms of the current and the energy of the electron beams were measured.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"12 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative Study of Electrochromic Properties of Polyaniline–Polyacid Layers Prepared by Spray-Coating and Drop-Casting Methods with Adding Carbon Nanotubes 添加碳纳米管的喷涂法和滴注法制备的聚苯胺-聚酸层电致变色性能比较研究
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s106378502318013x
A. A. Nekrasov, O. L. Gribkova, T. V. Krivenko
{"title":"Comparative Study of Electrochromic Properties of Polyaniline–Polyacid Layers Prepared by Spray-Coating and Drop-Casting Methods with Adding Carbon Nanotubes","authors":"A. A. Nekrasov, O. L. Gribkova, T. V. Krivenko","doi":"10.1134/s106378502318013x","DOIUrl":"https://doi.org/10.1134/s106378502318013x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The influence of the coating method (spray-coating or drop-casting onto horizontal substrate) on the electrochromic characteristics of the layers of water-soluble polyaniline–polyacid complex was investigated. It was shown that, in the case of adding single-wall nanotubes, the polyaniline–polyacid layers prepared by the scalable spray-coating technology demonstrate high coloration speed and electrochromic efficiency.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"32 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Amorphization of Silicon Nanowires upon Irradiation with Argon Ions 氩离子照射下硅纳米线的非晶化现象
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023170121
A. V. Kononina, Yu. V. Balakshin, K. A. Gonchar, I. V. Bozhev, A. A. Shemukhin, V. S. Chernysh
{"title":"Amorphization of Silicon Nanowires upon Irradiation with Argon Ions","authors":"A. V. Kononina, Yu. V. Balakshin, K. A. Gonchar, I. V. Bozhev, A. A. Shemukhin, V. S. Chernysh","doi":"10.1134/s1063785023170121","DOIUrl":"https://doi.org/10.1134/s1063785023170121","url":null,"abstract":"<p><b>Abstract</b>—The irradiation of silicon nanowires with Ar<sup>+</sup> ions with the energy of 250 keV and fluences of 10<sup>13</sup> to 10<sup>16</sup> cm<sup>–2</sup> was carried out. The dependence of the destruction of the structure under ion irradiation on the fluence was investigated by Raman spectroscopy. It was shown that the amorphization of porous silicon occurs at higher values of displacement per atom than in thin silicon films.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"16 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Kinetics of Spontaneous Formation of Core-Shell Structure in (In,Ga)As Nanowires (In,Ga)砷纳米线自发形成核壳结构的动力学
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023170224
N. V. Sibirev, Y. S. Berdnikov, I. V. Shtrom, E. V. Ubyivovk, R. R. Reznik, G. E. Cirlin
{"title":"Kinetics of Spontaneous Formation of Core-Shell Structure in (In,Ga)As Nanowires","authors":"N. V. Sibirev, Y. S. Berdnikov, I. V. Shtrom, E. V. Ubyivovk, R. R. Reznik, G. E. Cirlin","doi":"10.1134/s1063785023170224","DOIUrl":"https://doi.org/10.1134/s1063785023170224","url":null,"abstract":"<p><b>Abstract</b>—A model of spontaneous formation of the core-shell structure in (In,Ga)As nanowire grown via molecular beam epitaxy without independent radial growth is proposed. Within the framework of the proposed model, the distribution of In across the axis of the nanowire was fitted.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"135 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Anishchenko–Astakhov Quasiperiodic Generator Excited by External Harmonic Force 受外部谐波力激励的阿尼什琴科-阿斯塔霍夫准周期发电机
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023170170
A. P. Kuznetsov, Yu. V. Sedova
{"title":"Anishchenko–Astakhov Quasiperiodic Generator Excited by External Harmonic Force","authors":"A. P. Kuznetsov, Yu. V. Sedova","doi":"10.1134/s1063785023170170","DOIUrl":"https://doi.org/10.1134/s1063785023170170","url":null,"abstract":"<p><b>Abstract</b>—A harmonic effect on a modified Anishchenko–Astakhov generator capable of demonstrating two-frequency quasi-periodic oscillations in the autonomous mode is considered. The possibility of doubling the three-frequency tori in a non-autonomous system is shown. The possibility of the effect of chaos suppression by an external signal is demonstrated, which leads not only to periodic, but also to quasi-periodic modes when the influence amplitude exceeds a certain threshold.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"82 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Double Negative Media Based on Antiferromagnetic Semiconductors for the Terahertz Frequency Range 基于反铁磁半导体的太赫兹频率范围双负介质
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180049
S. V. Grishin, A. V. Bogomolova, S. A. Nikitov
{"title":"Double Negative Media Based on Antiferromagnetic Semiconductors for the Terahertz Frequency Range","authors":"S. V. Grishin, A. V. Bogomolova, S. A. Nikitov","doi":"10.1134/s1063785023180049","DOIUrl":"https://doi.org/10.1134/s1063785023180049","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The paper presents the results of a theoretical study of the dispersion characteristics of electromagnetic waves (EMW) existing in a transversely magnetized antiferromagnetic (AFM) semiconductor with loss. An AFM semiconductor is an infinite bi-gyrotropic medium, the effective material parameters of which are twice negative in several frequency ranges. It was found that these frequency bands are in the terahertz range, and there are four backward EMEs in them, two of which are TE waves, and the other two are TM waves.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"15 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Problems of Flow Separation Detection By Pressure Sensors on a Unmanned Aerial Vehicles with a Propeller 带螺旋桨无人飞行器上压力传感器的分流检测问题
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180153
P. A. Polivanov, A. A. Sidorenko
{"title":"Problems of Flow Separation Detection By Pressure Sensors on a Unmanned Aerial Vehicles with a Propeller","authors":"P. A. Polivanov, A. A. Sidorenko","doi":"10.1134/s1063785023180153","DOIUrl":"https://doi.org/10.1134/s1063785023180153","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>An experimental study of pulsations characteristics of the zone of flow separation arising at a small airplane- type UAV with a pushing two-blade propeller were carried out. The measurements were done in wind tunnel by unsteady pressure sensors and microphones built into the skin of the UAV for the test cases with and without a rotating propeller. A significant effect of the propeller on the level of pulsations was found. An increase of the incoming flow velocity led to a weakening of this effect. Analysis of the spectral data of the disturbances did not reveal a direct relationship between the propeller noise and the unsteady characteristics of the separation zone.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"16 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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