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Review on high repetition rate and mass production of the cryogenic targets for laser IFE

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High Power Laser Science and Engineering 2017年第2期5卷 28-51页

作者： I.V.Aleksandrova E.R.Koresheva Lebedev Physical Institute Russian Academy of SciencesMoscow119991Russia National Research Nuclear University MEPhl(moscow Engineering Physics Institute) Moscow115409Russia

In inertial fusion energy(IFE) research, a considerable attention has recently been focused on the issue of large target fabrication for MJ-class laser facilities. The ignition and high-gain target designs require a condensed uniform layer of hydrogen fuel on the inside of a spherical shell. In this report, we discuss the current status and further trends in the area of developing the layering techniques intended to produce ignition, and layering techniques proposed to high repetition rate and mass production of IFE targets.

关键词： free-standing and line-moving targets high-repetition-rate fuel supply inertial fusion energy target mass production

Non-equilibrium carrier capture,recombination and annealing in thick insulators and their impact on radiation hardness

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Journal of Semiconductors 2016年第11期37卷 73-79页

作者： G.I.Zebrevt M.G.Drosdetsky A.M.Galimov The Department of Micro-and Nanoelectronics of National Research Nuclear University"MEPHI" Moscow 115409Russia

This paper describes an approach to prediction of the thick insulators＇ radiation response based on modeling of the charge yield, which is dependent on irradiation temperature, dose rate, and electric field magnitudes. Temperature behavior of the charge yield and degradation saturation due to the interface precursor depletion has been modeled and simulated. Competition between the time-dependent and true dose rate （ELDRS） effects has been simulated and discussed within a framework of the rate-equation-based mathematical model. It was shown that the precursor trap in the thick insulating oxides can be important at high dose rates. It was also shown that full filling of the shallow hole traps in the insulating oxide bulk can cause suppression of dose-rate sensitivity at relatively high dose rates, especially in thick insulators.

关键词： bipolar devices total dose effects dose rate effects ELDRS insulators modeling

Influence of Particle Size Distribution on the Optical Properties of Fine-Dispersed Suspensions

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Fluid Dynamics & Materials Processing 2022年第1期18卷 1-14页

作者： Dmitrii Kuzmenkov Pavel Struchalin Yulia Litvintsova Maksim Delov Vladimir Skrytnyy Kirill Kutsenko National Research Nuclear University MEPhI(moscow Engineering Physics Institute) Moscow115409Russian Federation Western Norway University of Applied Sciences Bergen5063Norway

Nanofluids have great potential for solar energy harvesting due to their suitable optical and thermophysical *** of the promising applications of nanofluids is utilization in solar collectors with the direct absorption of light(DASC).The design of a DASC requires detailed knowledge of the optical properties of nanofluids,which can be significantly affected by the particle size *** paper presents the method to take into account the particle size distribution when calculating nanofluid extinction *** validate the proposed model,the particle size distribution and spectral absorbance were measured for aqueous suspension with multi-walled graphite nanotubes;the minimum size of primary nanoparticles was 49 *** proposed model is compared with experiments demonstrating the concentration averaged and maximum discrepancies of 6.6%and 32.2%against 12.6%and 77.7%for a model assuming a monosized suspension.

关键词： Nanoparticles multi-walled carbon nanotubes fine-dispersed suspension optical properties

Optical theorem,crossing property,and derivative dispersion relations:implications on the asymptotic behavior of σ_(tot)(s) and ρ(s)

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Chinese Physics C 2022年第8期46卷 72-90页

作者： S.D.Campos V.A.Okorokov Applied Mathematics Laboratory-CCTS/DFQM Federal University of São CarlosSorocaba CEP 18052-780Brazil moscow Engineering Physics Institute National Research Nuclear University MEPhI115409 MoscowRussia

In this paper,we present some results on the behavior of the total cross section and p-parameter at asymptotic energies in proton-proton(pp) and antiproton-proton(pp) ***,we consider three of the main theoretical results in high energy physics:the crossing property,derivative dispersion relation,and optical *** use of such machinery facilitates the derivation of analytic formulas for a wide set of the measured global scattering parameters and some important relations between *** suggested parameterizations approximate the energy dependence for the total cross section and ρ-parameter for pp and pp with a statistically acceptable quality in the multi-TeV ***,the qualitative description is obtained for important interrelations,namely difference,sum,and ratio of the antiparticle-particle and particle-particle total cross *** the reduced number of experimental data for the total cross section and p-parameter at the TeV-scale,which complicates any prediction for the beginning of the asymptotic domain,the fitting procedures indicates that asymptotia occur in the energy range 25.5-130 ***,in the asymptotic regime,we obtain α_(P)=1.A detailed quantitative study of the energy behavior of the measured scattering parameters and their combinations in the ultra-high energy domain indicates that the scenario with the generalized formulation of the Pomeranchuk theorem is more favorable with respect to the original formulation of this theorem.

关键词： optical theorem derivative dispersion relations asymptotic behavior Pomeranchuk theorem

Proposal for a nuclear light source

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Chinese Physics C 2023年第2期47卷 116-122页

作者： E.V.Tkalya P.V.Borisyuk M.S.Domashenko Yu.Yu.Lebedinskii P.N.Lebedev Physical Institute of the Russian Academy of Sciences 11999153 Leninskiy pr.MoscowRussia National Research Nuclear University MEPhI 115409Kashirskoe shosse 31MoscowRussia

This study considers a principal possibility of creating a nuclear light source of the vacuum ultra violet(VUV) range based on the ^(229)Th *** nuclear light source can help solve two main problems—excitation of the low-lying^(229m)Th isomer and precision measurement of the nuclear isomeric transition *** thorium nuclear light source is based on the nuclei implanted in a thin dielectric film with a large *** passing an electric current through the sample,the^(229)Th nuclei are excited to the low energy isomeric state 3/2^(+)(8.19±0.12eV) through the process of inelastic scattering of conduction *** subsequent spontaneous decay of^(229m)Th is followed by the emission of γ quanta in the VUV *** luminosity of the thorium nuclear light source is approximately 10^(5)photons/s per 1 A of current,per 1 ng of^(229)*** suggested scheme to obtain γ radiation from the^(229m)Th isomer can be considered as a type of nuclear analogue of the optical radiation from the usual metal-insulator-semiconductor(MIS) junction.

关键词： Th-229m excitation by electrons optical range gamma emission

Intense widely controlled terahertz radiation from laser-driven wires

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Matter and Radiation at Extremes 2023年第4期8卷 1-15页

作者： N.Bukharskiia Ph.Korneev National Research Nuclear University MEPhI 31 Kashirskoe shosse115409 MoscowRussian Federation

Irradiation of a thin metallic wire with an intense femtosecond laser pulse creates a strong discharge wave that travels as a narrow pulse along the wire *** traveling discharge efficiently emits secondary radiation with spectral characteristics that are mostly defined by the wire *** examples of designs are considered here in the context of generation of intense terahertz radiation with controllable characteristics for various scientific and technological *** proposed setup may be easily realized,and it has the merits of robustness,versatility,and high conversion efficiency(reaching several percent)of laser energy to terahertz radiation.

关键词： laser intense characteristics

Cross section of the Coulomb excitation of ^(229m)Th by low energy muons

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Chinese Physics C 2021年第9期45卷 143-147页

作者： E.V.Tkalya P.N.Lebedev Physical Institute of the Russian Academy of Sciences 11999153 Leninskiy pr.MoscowRussia National Research Nuclear University MEPhI 115409Kashirskoe shosse 31MoscowRussia Nuclear Safety Institute of RAS Bofshaya Tulskaya 52Moscow 115191Russia

The inelastic scattering cross section for muons,μ^(-),with energies E=9-100 eV from the ^(229)Th nuclei is calculated in the framework of the second order of the perturbation theory for quantum *** dominant contribution to the excitation of the low energy isomer ^(229m)Th(3/2^(+),8.19±0.12 eV)originates from the E2 *** excitation cross section reaches the value of 10^(-21) cm^(2) in the range E≈10 *** value is four to five orders of magnitude larger than the electron excitation cross section and is sufficient for the efficient excitation of ^(229m)Th on the muon beam at the next generation of muon colliders.

关键词： cross section muon Coulomb excitation Th-229

Molecular-Genetic Characterization of Human Rotavirus A Strains Circulating in moscow, Russia(2009–2014)

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Virologica Sinica 2018年第4期33卷 304-313页

作者： Victoria Kiseleva Evgeny Faizuloev Elena Meskina Anna Marova Alexey Oksanich Tatiana Samartseva Georgy Bakhtoyarov Natalia Bochkareva Nikolay Filatov Andrey Linok Yulia Ammour Vitaly Zverev Department of Virology I. Mechnikov Research Institute of Vaccines and Sera Moscow 105064 Russia Faculty of Preventive Medicine and Health Organization Russian Medical Academy of Continuous Professional Education Moscow 125993 Russia M. Vladimirsky moscow Regional Research Clinical Institute (MONIKI) Moscow 129110 Russia Faculty of Preventive Medicine I.M. Sechenov First Moscow State Medical University Moscow 119991 Russia

Enteric viruses are the most common cause of acute gastroenteritis （AGE） in young children and a significant public health problem globally. Hospital admissions of children under 5 years of age with diarrhea are primarily associated with group A rotavirus （RVA） infection. In this retrospective study, the population structure of viruses linked to AGE etiology in young children hospitalized with AGE in moscow was evaluated, and molecular characterization of RYA strains was performed. Fecal specimens were collected from children under 5 years old hospitalized with AGE between 2009 and 2014 in moscow, Russia. Multiplex real-time reverse transcription PCR was used to detect enteric viruses and for G/[P]-genotyping of isolated RVAs. Sequencing of RVA VP7 and VP4 cDNA fragments was used to validate the data obtained by PCR- genotyping. The main causes for hospitalization of children with AGE were RVA （40.1%）, followed by noroviruses （11.4%）, while adenoviruses, astroviruses, sapoviruses, enteroviruses, and orthoreoviruses were detected in 4.7%, 1.9%, 1.4%, 1.2%, and 0.2% of samples tested, respectively. Nosocomial infections, predominantly associated with RVAs and noroviruses, were detected in 24.8% of cases and occurred significantly more frequently in younger infants. The predominant RVA genotype was G4P[8], detected in 38.7% of RVA-positive cases, whereas genotypes G1P[8], G9P[8], G3P[8], and G2P[4] were found in 11.8%, 6.6%, 4.2%, and 3.3% of cases, respectively. Together, the presence of circulating RVA strains with rare VP7 and VP4 gene variants （G6 and P[9]） highlights the need to conduct continuous epidemiological monitoring of RVA infection.

关键词： Acute gastroenteritis (AGE) Rotaviral enteritis Rotavirus vaccine Rotavirus G/[P] genotype moscow

Effect of Nb-content on the corrosion resistance of Co-free high entropy alloys in chloride environment

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Tungsten 2024年第4期6卷 778-793页

作者： Peng-Fei Dai Yang Zhang Sergey Rogozhkin Ji-Hong Han Shu-Wen Li Zhong-Wu Zhang Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin150001China National Research Nuclear University“MEPhI” Moscow115409Russia National Research Center“Kurchatov Institute” Moscow123182Russia

This study investigated the effect of Nb-content on the corrosion behavior of the Al_(7)Cr_(20)Fe_(35-x)Ni_(35)Mo_(3)Nb_(x)(x=0,1 and 2)high-entropy alloys in a *** results indicated that only the face centered cubic phase existed in the NbO and Nbl alloys,while the emergence of Laves phase was observed when Nb-content reached 2 at.%.The NbO and Nb1alloys exhibited pitting corrosion,while the NiAl-rich phase experienced localized preferential corrosion in the Nb2 *** electrochemical results revealed that the corrosion current density of the Nbx(x=0,1 and 2)alloys fell within the range of 10^(-8)-10-7 A·cm^(-2),with a pitting corrosion potential exceeding 700 ***,the Nb1 alloy exhibited the most impressive corrosion resistance,as its corrosion current density(7×10^(-8)A·cm^(-2))was merely half that of 316LN stainless *** is attributed to its rapid passivation process,resulting in the development of a protective film characterized by an increased Cr_(2)O_(3)/Al_(2)O_(3)+Cr(OH)_(3)*** study highlighted that the addition of Nb contributed to gram refinement,decreased corrosion current density,and elevated pitting potential,favoring passivation and improving corrosion ***,excessive Nb-content resulted in the emergence of the Laves phase,inducing galvanic corrosion and diminishing resistance to corrosion.

关键词： High entropy alloys Microstructure Corrosion Passive film Niobium