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High-voltage Nanosecond Pulse Generators of the ＂PROTEUS＂ Line for Discharge with Runaway Electrons Applications

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高电压技术 2013年第10期39卷 2506-2513页

作者： Anatoly N. Maltsev Maxim v. Martynov Alexey v. Mikov viktor G. Podkovyrov Leonid L. Zhukov Alexander Yu. Ivanov Institute of Atmospheric Optics Russian Academy of Sciences Tomsk 634021 Russia Electrodynamic Systems & Technologies LLC Tomsk 634021 Russia Institute of High-current Electronics Russian Academy of Sciences Tomsk 634021 Russia

Many applications of gas discharge with runaway electrons (DRE) require high-voltage pulse generators (HvPG) with very high increasing rate of output voltage (up to 100 kv/ns), long operation life and low cost. Such HvPGs have to be controlled by external computer for working in combination with other modern equipment. In this paper, some HvPGs development for DRE application in industry and medicine are described. The functional structure and operation principles are discussed for the HvPG of "PROTEUS' line. It is shown that on different loads, the "PROTEUS" generators can produce high-voltage nanosecond pulse with energy up to 1 J, output voltage amplitude from zero to 150 kv, and pulse repetition frequency from zero to 2 000 Hz. Four models of the "PROTEUS" generators are described. The output voltage leading front duration is 150 ns for the "PROTEUS-I" model, 10-20 ns for the "PROTEUS-II", 2 ns for the "PROTEUS-IH" and 0.5 ns for the "PROTEUS-Iv". DRE parameters obtained by using "PROTEUS" HvPGs are demonstrated. Some results of DRE application in solid-state surface modification of natural textile and polymer films are shown as well.

关键词： PROTEUS 纳秒脉冲发生器电子应用气体放电高压失控输出电压脉冲重复频率

Coexisting charge density wave and ferromagnetic instabilities in monolayer InSe

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npj Computational Materials 2022年第1期8卷 1101-1109页

作者： Evgeny A.Stepanov viktor Harkov Malte Rösner Alexander I.Lichtenstein Mikhail I.Katsnelson Alexander N.Rudenko CPHT CNRSEcole PolytechniqueInstitut Polytechnique de ParisF-91128PalaiseauFrance I.Institute of Theoretical Physics University of HamburgNotkestraße 922607HamburgGermany European X-Ray Free-Electron Laser Facility Holzkoppel 422869SchenefeldGermany Radboud University Institute for Molecules and Materials6525AJNijmegenThe Netherlands The Hamburg Centre for Ultrafast Imaging Luruper Chaussee 14922761HamburgGermany

Recently fabricated InSe monolayers exhibit remarkable characteristics that indicate the potential of this material to host a number of many-body *** this work,we systematically describe collective electronic effects in hole-doped InSe monolayers using advanced many-body *** this end,we derive a realistic electronic-structure model from first principles that takes into account the most important characteristics of this material,including a flat band with prominent van Hove singularities in the electronic spectrum,strong electron–phonon coupling,and weakly screened long-ranged Coulomb *** calculate the temperature-dependent phase diagram as a function of band filling and observe that this system is in a regime with coexisting charge density wave and ferromagnetic instabilities that are driven by strong electronic Coulomb *** regime can be achieved at realistic doping levels and high enough temperatures,and can be verified *** find that the electron–phonon interaction does not play a crucial role in these effects,effectively suppressing the local Coulomb interaction without changing the qualitative physical picture.

关键词： ferromagnetic charge wave

Nuclear-Chemical Synthesis of 1,4-Diazine Quaternary Salts

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Open Journal of Synthesis Theory and Applications 2013年第2期2卷 51-55页

作者： Nadezhda E. Shchepina viktor v. Avrorin Gennadii A. Badun Chemistry Department St-Petersburg State University St-Petersburg Russia Laboratory of Radiochemistry Natural Sciences Institute of Perm State University Perm Russia Radiochemistry Department M. V. Lomonosov Moscow State University Moscow Russia

Ion-molecular reactions of nucleogenic phenyl cations with the nucleophilic centers of 1,4-diazines have been investigated for the first time. Previously unknown tritium labeled N-phenyl quaternary derivatives of pyra... 详细信息

关键词： Nucleogenic Phenyl Cations 1 4-Diazines Quaternization Tritium Labeling

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Windows 98/NT编程大全 G

Meteorites Penetration into the Dense Layers of the Earth＇s Atmosphere： Physical Mechanism behind the Explosive Phenomena

1999年

作者：（美）（v.托特）viktor Toth 李昭智等译

来源：畅想之星图书光盘版（南... 评论

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Journal of Earth Science and Engineering 2013年第12期3卷 829-833页

作者： viktor v. Barelko Mikhail S. Drozdov Maxim v. Kuznetsov Ivan P. Parkin Institute of Problems of Chemical Physics RAS (Russian Academy of Sciences) Academician Semenov Prospect 1 Chernogolovka Moscow region 142432 Russia Institute of Energy Problems for Chemical Physics (Branch) Academician Semenov Prospect 1 Chernogolovka Moscow region 142432 Russia All-Russian Research Institute on Problems of Civil Defense and Emergencies of EMERCOM (Emergency Control Ministry) of Russia Moscow 121352 Russia Materials Chemistry Research Center Department of Chemistry University College London London WC I H OAJ UK

This discussion paper is an attempt to consider new ideas about the nature of explosive phenomena of the meteorite bodies in the Earth＇s atmosphere. Authors attract approaches, based on the concepts of physics of combustion, explosion and detonation in order to explain the explosive collapse of the meteorite. Authors believe that the meteorite explosion may be the result of gas-detonation mechanism of overheated meteoric bodies explosive boiling-up （the ＂vapor explosion＂）, accompanied by the formation of a supersonic front of shock wave. The considered hypothesis regarding the role of the ＂vapor explosion＂ in geological disasters can be used to explain the mechanisms of explosive phenomena in volcanology：（1） With respect to the description of nature of phreatic eruptions; （2） for interpretation of dynamic regularities of the volcano crater opening and the subsequent shock-wave emission of steam-gas ＂fountain＂ to a height of several kilometers with fragments of magma and rocks as a result of the ＂vapor explosion＂ of overheated magma mass under the dome of the volcano.

关键词： Meteorite Earth's atmosphere overheating vapor explosion phreatic eruptions.

Comparative Studies of Thermal Stability of Coal Tar Pitches

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Journal of Chemistry and Chemical Engineering 2012年第9期6卷 860-865页

作者： Andrey A. Gahguzov valery v. Kulakov Denis I. Kalugin Artem P. Malakho viktor v. Avdeev Chemistry Department Moscow State University Moscow 119991 Russia The Aircraft Corporation 《Rubin》 Balashikha 143900 Russia

In the present work, three medium softening point coal tar pitches were used for comparative thermal stability and under-storage stability investigation. Powders of the pitches were found to be different under storage： one of the pitches was caked and slumped after 7-day or longer storage. For thermal stability investigation the soft temperature treatment （265℃） of coal tar pitches was used. Detailed study of initial and treated pitches was carried out. Experimental results demonstrated that LMW-HC （high low-molecular-weight hydrocarbons） and oxygen content influence pitch quality characteristics in a negative way under long-term storage and lead to highest properties change after thermal stability treatment.

关键词： Coal tar pitch rheology thermal analysis toluene-insoluble quinoline-insoluble elemental analysis GCMS.

Passively Q-switched femtosecond-laser-written thulium waveguide laser based on evanescent field interaction with carbon nanotubes

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Photonics Research 2018年第10期6卷 971-980页

作者： ESROM KIFLE PAvEL LOIKO JAvIER RODRíGUEZ váZQUEZ DE ALDANA CAROLINA ROMERO AIRáN RóDENAS SUN YUNG CHOI JI EUN BAE FABIAN ROTERMUND viktor ZAKHAROv ANDREY vENIAMINOv MAGDALENA AGUILó FRANCESC DíAZ UWE GRIEBNER vALENTIN PETROv XAvIER MATEOS Universitat Rovira i virgili Departament Quimica Fisica i Inorgànica Fisica i Cristal·lografia de Materials i Nanomaterials (FiCMA-FiCNA)-EMaS Campus Sescelades E-43007 Tarragona Spain ITMO University 49 Kronverkskiy pr. 197101 St. Petersburg Russia Aplicaciones del Láser y Fotónica University of Salamanca 37008 Salamanca Spain Istituto di Fotonica e Nanotecnologie Consiglio Nazionale delle Ricerche (IFN-CNR) Piazza Leonardo da Vinci 32 20133 Milano Italy Department of Physics KAIST 291 Daehak-ro Yuseong-gu 34141 Daejeon South Korea Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy Max-Bom-Str. 2a D-12489 Berlin Germany

Surface channel waveguides(WGs) were fabricated in a monoclinic Tm^(3+):KLu(WO_4)_2 crystal by femtosecond direct laser writing(fs-DLW). The WGs consisted of a half-ring cladding with diameters of 50 and 60 μm located just beneath the crystal surface. They were characterized by confocal laser microscopy and μ-Raman spectroscopy,indicating a reduced crystallinity and stress-induced birefringence of the WG cladding. In continuous-wave(CW)mode, under Ti:sapphire laser pumping at 802 nm, the maximum output power reached 171.1 mW at 1847.4 nm,corresponding to a slope efficiency η of 37.8% for the 60 μm diameter WG. The WG propagation loss was0.7 0.3 d B∕cm. The top surface of the WGs was spin-coated by a polymethyl methacrylate film containing randomly oriented(spaghetti-like) arc-discharge single-walled carbon nanotubes serving as a saturable absorber based on evanescent field coupling. Stable passively Q-switched(PQS) operation was achieved. The PQS60 μm diameter WG laser generated a record output power of 150 m W at 1846.8 nm with η = 34.6%. The conversion efficiency with respect to the CW mode was 87.6%. The best pulse characteristics(energy/duration)were 105.6 nJ/98 ns at a repetition rate of 1.42 MHz.

关键词：激光技术波导技术发展现状通讯技术

Postburn dorsal and palmar interdigital commissural contractures: Anatomy and treatment—A new approach

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Advances in Bioscience and Biotechnology 2013年第4期4卷 518-530页

作者： viktor M. Grishkevich Department of Reconstructive and Plastic Surgery A.V. Vishnevsky Institute of Surgery of the Russian Academy of Medical Sciences Moscow Russia

Background: Postburn dorsal and palmar interdigital commissural contracture is one of the most common complications of hand burns which restricts finger motion and presents a serious cosmetic defect. Many techniques and flaps have been suggested, and research continues for more effective techniques as the problem has not been solved. Methods: Anatomy of scar interdigital commissural contractures was studied in 760 operated patients aiming to develop a new, more effective surgical technique. Results: There are two anatomic types of scar commissural contractures: edge and total. Dorsal and palmar commissural contractures are identified as the edge type and are caused by the fold located along interdigital fossa’s edge. In the fold, the lateral sheet is scars, and the medial sheet and adjacent interdigital fossa are healthy skin. Total commissural contracture is characterized by interdigital fossa obliteration and phalanges’ fusion. Scar sheets have a trapeze-shaped surface deficiency (contracture cause), which spreads from the fold’s crest to metacarpophalangeal joints. The surgical technique consists of scar surface deficiency compensation and commissural groove and slant restoration which can be optimally achieved with the trapezoid adipose-cutaneous flap. The best donor site is interdigital fossa. The small skin grafts on the lateral surface of proximal phalanges did not present a cosmetic defect. Conclusion: Dorsal and palmar interdigital commissural contractures are of an edge type and can be successfully reconstructed with trapeze-flap plasty.

关键词： Postburn Syndactyly Syndactyly Treatment Hand Burn Complications Trapezoid Flap Trapeze-Flap Plasty

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