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Metrology for sub-Rayleigh-length target positioning in~10^(22)W/cm^(2)laser-plasma experiments

High power Laser science and Engineering 2024年第3期12卷 90-105页

作者： E.A.Vishnyakov A.sagisaka K.ogura T.zh.Esirkepov B.Gonzalez-Izquierdo C.D.Armstrong T.A.pikuz s.A.pikuz W.Yan T.M.Jeong s.singh p.Hadjisolomou o.Finke G.M.Grittani M.Nevrkla C.M.Lazzarini A.Velyhan T.Hayakawa Y.Fukuda J.K.Koga M.Ishino K.Kondo Y.Miyasaka A.Kon M.Nishikino Y.V.Nosach D.Khikhlukha I.p.Tsygvintsev D.Kumar J.Nejdl D.Margarone p.V.sasorov s.Weber M.Kando H.Kiriyama Y.Kato G.Korn K.Kondo s.V.Bulanov T.Kawachi A.s.pirozhkov ELI Beamlines Facility The Extreme Light Infrastructure ERICDolníBrežanyCzech Republic Kansai Institute for photon science(KpsI) QSTKyotoJapan Central Laser Facility Rutherford Appleton LaboratorySTFCHarwell OxfordDidcotUK Institute for open and Transdisciplinary Research Initiatives Osaka UniversityOsakaJapan HB11 Energy Holdings FreshwaterAustralia Key Laboratory for Laser plasmas(Ministry of Education) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Collaborative Innovation Center of IFsA Shanghai Jiao Tong UniversityShanghaiChina Institute of plasma physics AsCR PragueCzech Republic FZU-Institute of physics AsCR PragueCzech Republic Czech Technical University in prague FNSPEPragueCzech Republic Institute of Laser Engineering Osaka UniversityOsakaJapan Institute of physics National Academy of Sciences of UkraineKyivUkraine IsTEQ AR YerevanArmenia

Tight focusing with very small f-numbers is necessary to achieve the highest at-focus ***,tight focusing imposes strong demands on precise target positioning in-focus to achieve the highest on-target irradiance We describe several near-infrared,visible,ultraviolet and soft and hard X-ray diagnostics employed in a~10^(22)W/cm^(2)laser±plasma *** used nearly 10 J total energy femtosecond laser pulses focused into an approximately1.3-μm focal spot on 5±20μm thick stainless-steel *** discuss the applicability of these diagnostics to determine the best in-focus target position with approximately 5μm accuracy(i.e.,around half of the short Rayleigh length)and show that several diagnostics(in particular,3ωreflection and on-axis hard X-rays)can ensure this *** demonstrated target positioning within several micrometers from the focus,ensuring over 80%of the ideal peak laser intensity *** approach is relatively fast(it requires 10±20 laser shots)and does not rely on the coincidence of low-power and high-power focal planes.

关键词： laser-plasma interaction precise target positioning spectroscopy ultra-high intensity X-rays

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Journal of Hydrodynamics 2018年第1期30卷 140-152页

作者： zh.zhang Free Researcher Zurich Switzerland

An analytical method is presented, which enables the non-uniform velocity and pressure distributions at the impeller inlet of a pump to be accurately computed. The analyses are based on the potential flow theory and the geometrical similarity of the streamline distribution along the leading edge of the impeller blades. The method is thus called streamline similarity method（ssM）. The obtained geometrical form of the flow distribution is then simply described by the geometrical variable G（s） and the first structural constant G_Ⅰ. As clearly demonstrated and also validated by experiments, both the flow velocity and the pressure distributions at the impeller inlet are usually highly non-uniform. This knowledge is indispensible for impeller blade designs to fulfill the shockless inlet flow condition. By introducing the second structural constant G_Ⅱ, the paper also presents the simple and accurate computation of the shock loss, which occurs at the impeller inlet. The introduction of two structural constants contributes immensely to the enhancement of the computational accuracies. As further indicated, all computations presented in this paper can also be well applied to the non-uniform exit flow out of an impeller of the Francis turbine for accurately computing the related mean values.

关键词： pumps streamline similarity method flow distribution shock loss structural constant

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Computer simulation of Two Component Dense plasma by Molecular Dynamics Method

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Communications in Computational physics 2014年第4期15卷 1159-1166页

作者： zh.A.Moldabekov T.s.Ramazanov IETp Al-Farabi Kazakh National University71 Al Farabi av.Almaty050040 Kazakhstan

In the present work two component dense semiclassical plasma of protons and electrons is *** and electrodynamic properties of the plasma by molecular dynamic simulation are *** these purposes semiclassical interparticle potential which takes into account quantum mechanical diffraction and symmetry effects is *** considered range of density of plasma is n=1022cm^(−3)to n=1024cm^(−3).Fluctuations and dynamic dielectric functions were calculated using velocity autocorrelation functions.

关键词： Molecular dynamic simulation dense semiclassical plasma semiclassical interparticle potential

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Fast magnetic energy dissipation in relativistic plasma induced by high order laser modes

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High power Laser science and Engineering 2016年第2期4卷 85-89页

作者： Y.J.Gu Q.Yu o.Klimo T.zh.Esirkepov s.V.Bulanov s.Weber G.Korn Institute of physics of the AsCR Institute of Modern physics Fudan University FNspE Czech Technical University in Prague Kansai photon science Institute Japan Atomic Energy Agency

Fast magnetic field annihilation in a collisionless plasma is induced by using TEM(1,0) laser pulse. The magnetic quadrupole structure formation, expansion and annihilation stages are demonstrated with 2.5-dimensional particle-in-cell simulations. The magnetic field energy is converted to the electric field and accelerate the particles inside the annihilation plane. A bunch of high energy electrons moving backwards is detected in the current sheet. The strong displacement current is the dominant contribution which induces the longitudinal inductive electric field.

关键词： high order laser mode laser–plasma interaction magnetic annihilation

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solid liquid Mixed Casting of Al-si Alloy

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Journal of Central south University 2000年第3期12卷 133-135页

作者： Chen, zh Kang, ZT Cent s Univ Technol Dept Mat Sci & Engn Changsha 410083 Peoples R China

The paper presents a novel material preparation technology—solid liquid mixed casting technology. In the technology, large amounts of homogeneous alloy powder or heterogenous powder with perfect wettability are added into the superheated melt. After strong agitation, the mixed melt can be cast or hot processed. Applying solid liquid mixed casting, three kinds of Al si alloys were investigated. The results show that, when the mass of powder accession to alloy melt is about 1, the mean size of primary si in hyper eutectic alloy can be controlled at less than 5 μm; and the mean grain size of α phase in hypo eutectic alloy is less than 10 μm. This technology has the advantage of preparing material with very fine microstructure by fairly simple casting process, and may be a new practicable and valuable metal preparation technology.

关键词： solid liquid mixed casting powder melt Document code:A

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EFFECT　oF　RARE　EARTH　ELEMENT　Er　oN　sTRENGTHENING　oF　INTERFACE　oF　Ti（C，N）　BAsED　CERMETs

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中国有色金属学会会刊：英文版 1996年第3期6卷 136-139页

作者： Liu, N Cui, K Hu, zh ANHUI INsT TECHNoL DEPT MAT SCI & ENGNHEFEI 230069PEOPLES R CHINA HUAzhoNG UNIV sCI & TECHNoL WUHAN 430074PEOPLES R CHINA

ＥＦＦＥＣＴＯＦＲＡＲＥＥＡＲＴＨＥＬＥＭＥＮＴＥｒＯＮＳＴＲＥＮＧＴＨＥＮＩＮＧＯＦＩＮＴＥＲＦＡＣＥＯＦＴｉ（Ｃ，Ｎ）ＢＡＳＥＤＣＥＲＭＥＴＳ￥ＬｉｕＮｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎ... 详细信息

ＥＦＦＥＣＴＯＦＲＡＲＥＥＡＲＴＨＥＬＥＭＥＮＴＥｒＯＮＳＴＲＥＮＧＴＨＥＮＩＮＧＯＦＩＮＴＥＲＦＡＣＥＯＦＴｉ（Ｃ，Ｎ）ＢＡＳＥＤＣＥＲＭＥＴＳ￥ＬｉｕＮｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，...

关键词： rare earth element Er Ti(C N) based cermets bending strength hardness

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Corrosion behavior of magnesium in aqueous sulfate-containing electrolytes

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镁合金学报(英文) 2023年第6期11卷 2125-2141页

作者： Ainaz A.Abildina Andrey p.Kurbatov Yeldana G.Bakhytzhan Raigul zh.Jumanova Akmaral M.Argimbayeva Khaisa Avchukir Gulmira s.Rakhymbay Center of physical and Chemical Methods of Research and Analysis Al-Farabi Kazakh National University050012 Tole bi 96AAlmatyKazakhstan satbayev University Satbayev 22Almaty 050013Kazakhstan Al-Farabi Kazakh National University Al-Farabi 71Almaty 050040Kazakhstan

studies have been conducted on the corrosive behavior of magnesium in aqueous sulfate electrolytes(0.5 mol/L Mgso_(4);0.5 mol/L Na2so_(4);0.5 mol/L Mgso_(4)+0.5 mol/L Na2so_(4)).The composition structure and morphology of the surface of the samples were studied using scanning electron microscopy in combination with X-ray spectral *** results of the experiments showed the formation of a surface film inhomogeneous in its structure and composition with the main components Mg(oH)_(2)and Mg *** increase in the exposure time of the electrode in solution led to the formation of microcracks on the main film caused by internal stress because of hydration of magnesium oxide produced during *** salt composition of the electrolyte determines the morphology and thickness of corrosion films due to differences in the solubility of the products formed during the hydrolysis of magnesium oxide and the kinetics of this *** the methods of scanning electron microscopy X-ray electron analysis gravimetry and voltammetry it has been established that at various stages of magnesium corrosion in different electrolytes the growth rates of corrosion films are determined by the kinetics of magnesium oxide formation its hydration and dissolution followed by crystallization in the form of a brucite phase of loose sediments on the surface.

关键词： Magnesium Corrosion Film Electrolyte Gravimetry Corrosion current

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Relaxation of non-isothermal hot dense plasma parameters

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Matter and Radiation at Extremes 2018年第1期3卷 40-49页

作者： s.K.Kodanova M.K.Issanova s.M.Amirov T.s.Ramazanov A.Tikhonov zh.A.Moldabekov Institute for Experimental and Theoretical physics Al-Farabi Kazakh National University71 Al-Farabi Str.050040 AlmatyKazakhstan Institute of Applied sciences and IT 40-48 Shashkin Str.050038 AlmatyKazakhstan Nazarbayev University Kabanbay Batyr Ave.53Astana 010000Kazakhstan

The relaxation of temperature,coupling parameters,the excess part of equation of state,and the correlation energy of the non-isothermal hot dense plasmas are considered on the basis of the method of effective interaction *** electroneion effective interaction potential for the hot dense plasma is *** accuracy of description of the dense plasma properties by the effective electroneion interaction potential is demonstrated by the agreement of the derived quantities like stopping power and transport coefficients calculated using our methodology with the results of the finite-temperature Kohn-sham density-functional theory molecular dynamics,and orbital-free molecular dynamics results as well as with the data obtained using other theoretical approaches.

关键词： Dense plasma Effective potentials Temperature relaxation stopping power Transport

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Inhibitory activity of polysaccharide extracts from three kinds of edible fungi on proliferation of human hepatoma sMMC-7721 cell and mouse implanted s180 tumor

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World Journal of Gastroenterology 1999年第5期5卷 404-407页

作者： Jiang sM Xiao ZM Xu zh shandong Normal Univ Dept Biol Provincial Key Lab Anim Stress Jinan 250014 Shandong Prov Peoples R China Univ Heidelberg D-6900 Heidelberg Germany

AIM To determine the activities ofpolysaccharide extracts from Flammulina velutipes (Curt. ex Fr. ) sing (FV), Lentinusedodes (LE) and Agaricus bisporus sing (AB)on the proliferation of human hepatoma sMMC-7721 cells in vitro and on mouse implanted s-180tumors in *** The polysaccharide extracts were isolated from the fruit bodies of FV, LE and AB by the methods of hot-water extraction, sevag’sremoval of proteins, ethanol precipitation,trypsin digestion and ethanol fractionalprecipitation. Human hepatoma sMMC-7721 cells were treated with 50 mg/L polysaccharide extracts, and the mitosis index, mitochondria activity and cell proliferation were detected at different times in both control and experimental groups. The mice with s-180 implanted tumors were injected with the polysaccharide extracts at 24 mg/ kg body weight for 9 d and the tumorweight was measured on the 15th *** The mitosis index of hepatoma cells in vitro could be significantly decreased by treatment with the polysaccharide extracts fromthe three kinds of edible fungi (p s and mitochondria activity of sMMC7721 cells treated with polysaccharide extracts were lower than those in control groups (p on rates of polysaccharide extracts against implanted s-180 tumors in mice were 52.8%, 56.6% and 51 .9% respectivelycompared with that in c0ntrol ***0N The poIysaccharide extractsfrom the three kinds of edible fungi could inhibitnot only the Cultured malignant cells in vitfo butalso impIanted sl80 tum0r i0 vivo.

关键词： polysaccharide, edible fungi liver neoplasm carcinoma, hepatocellular sMMC7721, tumor cell, cultured implanted tumor, s-180 cell proliferation

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中国有色金属学会会刊：英文版 2001年第6期11卷 843-846页

作者： Yan, HG Chen, zh Kang, ZT Chen, G Hunag, pY Hunan Univ Sch Mat Sci & Engn Changsha 410082 Peoples R China Cent s Univ Dept Mat Sci & Engn Changsha 410083 Peoples R China

The phase formation regularities in nanometer powders of ternary alloys prepared by gas evaporation process with induction current as the heating source were investigated. Al-Cu-Mn and Al-Cu-Cr were chosen as the samples in this study. The experimental results show that the necessary conditions for forming ternary compound phases in a ternary alloy nanometer powder are that they must be able to form in a conventional bulk alloy. To obtain a ternary compound phase in nanometer powders, composition of the master alloy must be in a certain range. Changing the composition of the master alloy and evaporation temperature can control the kinds of the phases and their relative amount in the alloy nanometer powders. In present study, AlMn, Al8Mn5 and AlCu2Mn phases formed in as-prepared nanometer powders of Al-Cu-Mn alloy, and the highest relative amount of AlCu2Mn phase is about 99%. In nanometer powders of Al-Cu-Cr alloy,Cu9Al4, Al2Cu3, AlCr2 and Al13Cr2 phases formed without any ternary compound phase.

关键词： nanometer powder gas evaporation alloy powder

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