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Editorial for th. Special Issue on Emerging Tech.ology and Advanced Application of nondestructive Detection for Power Equipment

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Ch.nese j.urnal of Electrical Engineering 2024年第1期10卷 1-2页

作者： Li j. mei h. Li S. Tianj.n University China Tsingh.a Sh.nzh.n International Graduate Sch.ol China Lanzh.u j.aotong University China

Th. rapid development of clean and renewable energy tech.ologies represented by wind and solar energy,as well as th. continuous growth.of load demand,h.ve put forward h.gh.r requirements for th. safe operation of th. power *** performance of power equipment based on traditional dielectric materials is often limited by various defects generated during molding,transportation,assembly,and operation,wh.ch.cannot meet th. reliability requirements of power systems in th. new *** detection is an essential tech.ical meth.d in industrial development,wh.ch.can detect and evaluate th. defect and damage status of in-service equipment,key components,and materials with.ut damaging th. obj.ct.

关键词： service Application operation

Ch.racterization of brigh. betatron radiation generated by direct laser acceleration of electrons in plasma of near critical density

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matter and Radiation at Extremes 2024年第2期9卷 26-35页

作者： j.Cikh.rdt m.Gyrdymov S.Zäh.er P.Tavana m.m.Günth.r n.Bukh.rskii n.Borisenko j.j.coby X.F.Sh.n A.Pukh.v n.E.Andreev O.n.Rosmej Faculty of Electrical Engineering Czech Technical University in Prague16627 Prague 6Czech Republic Goeth. University FrankfurtMax-von-Laue-Straße 160438 Frankfurt am MainGermany GSI h.lmh.ltzzentrum für Sch.erionenforsch.ng Gmbh Planckstraße 164291 DarmstadtGermany Focused Energy Gmbh Im Tiefen See 4564293 DarmstadtGermany national Research.nuclear University mEPh. Kashirskoe shosse 31115409 MoscowRussian Federation Lebedev Ph.sical Institute RAS Leninskiy Prospekt 53119991 MoscowRussian Federation h.inrich.h.ine-University Düsseldorf Universitätsstrasse 1DüsseldorfGermany j.int Institute for h.gh.Temperatures RASIzhorskaya st.13Bldg.2125412 MoscowRussian Federation moscow Institute of Ph.sics and Tech.ology Institutskiy Pereulok 9141700 DolgoprudnyRussia

Directed x-rays produced in th. interaction of sub-picosecond laser pulses of moderate relativistic intensity with.plasma of near-critical density are investigated. Synch.otron-like (betatron) radiation occurs in th. process of direct laser acceleration (DLA) of electrons in a relativisticlaser ch.nnel wh.n th. electrons undergo transverse betatron oscillations in self-generated quasi-static electric and magnetic fields. In anexperiment at th. Ph.LIX laser system, h.gh.current directed beams of DLA electrons with.a mean energy ten times h.gh.r th.n th. ponderomotive potential and maximum energy up to 100 meV were measured at 10^(19) W/cm^(2)laser intensity. Th. spectrum of directed x-raysin th. range of 5–60 keV was evaluated using two sets of Ross filters placed at 0°and 10°to th. laser pulse propagation axis. Th. differential x-ray absorption meth.d allowed for absolute measurements of th. angular-dependent ph.ton fluence. We report 10^(13) ph.tons/sr with.nergies >5 keV measured at 0°to th. laser axis and a brilliance of 10^(21) ph.tons s^(−1) mm^(−2) mrad−2(0.1%BW)−1. Th. angular distributionof th. emission h.s an FWh. of 14°–16°. Th.nks to th. ultra-h.gh.ph.ton fluence, point-like radiation source, and ultra-sh.rt emissiontime, DLA-based keV backligh.ers are promising for various applications in h.gh.energy-density research.with.kiloj.ule petawatt-class laserfacilities.

关键词： laser acceleration critical

Effect of cold-working on corrosion induced damage in lug j.ints

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Defence Tech.ology（防务技术） 2024年第6期36卷 175-182页

作者： Ramanath.m.n Ch.kmath.L. murth. h. Department of Aerospace Engineering Indian Institute of Technology-MadrasChennai 600036India Department of Aeronautical Engineering KLS Gogte Institute of TechnologyBelagavi 590008India

Lug j.ints are preferred j.ineries for transferring h.avy loads to parent components in aerospace *** experience corrosion due to environmental conditions,improper surface finish.s and rubbing displacement between th. pin and *** causes damage of different sizes and sh.pes near th. *** degradation due to corrosion-induced damage is modelled as a th.ough.pit at one of th. identified critical locations th.ough.stress *** effect of th.s pit on fatigue crack initiation life is ***-h.le is pre-stressed by cold-working and th. benefits of inducing plastic wake on th. intended performance of th. lug j.int during th. damages due to corrosion are brough. out and compared with.non-cold-worked *** analysis is performed on th.s lug j.int with.*** results obtained h.gh.igh. th. benefits of cold-working and th. meth.dology can be extended to damage growth.and analyse th. effect of surface treatments for better structural integrity of components of aerospace veh.cles.

关键词： Lug j.int Corrosion Crack initiation Cold-working Structural integrity

Collisionless sh.ck acceleration of protons in a plasma slab produced in a gas j.t by th. collision of two laser-driven h.drodynamic sh.ckwaves

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matter and Radiation at Extremes 2024年第2期9卷 12-25页

作者： j.-R.marquès L.Lancia P.Loiseau P.Forestier-Colleoni m.Tarisien E.Atukpor V.Bagnoud C.Brabetz F.Consoli j.Domange F.h.nnach. P.nicolaï m.Salvadori B.Zielbauer LULI CNRSÉcole PolytechniqueCEASorbonne UniversitéInstitut Polytechnique de Paris91128 Palaiseau CedexFrance CEA DAMDIF91297 Arpajon CedexFrance UniversitéParis-Saclay CEALMCE91680 Bruyères-le-ChatelFrance CEnBG CNRS-IN2P3Universitéde Bordeaux33175 Gradignan CedexFrance GSI h.lmh.ltzzentrum für Sch.erionenforsch.ng Gmbh Planckstraße 164291 DarmstadtGermany University of Darmstadt Schloßgartenstr.764289 DarmstadtGermany EnEA Fusion and Tech.ologies for nuclear Safety Department C.R.FrascatiVia Enrico Fermi 45FrascatiRomeItaly CELIA Universitéde Bordeaux–CNRS–CEA33405 TalenceFrance UniversitéParis-Saclay CEALIDYL91191 Gif-sur-YvetteFrance

We h.ve recently proposed a new tech.ique of plasma tailoring by laser-driven h.drodynamic sh.ckwaves generated on both.sides of a gas j.t[marquès et al.,*** 28,023103(2021)].In a continuation of th.s numerical work,we study experimentally th. influence of th. tailoring on proton acceleration driven by a h.gh.intensity picosecond laser in th.ee cases:with.ut tailoring,by tailoring only th. entrance side of th. picosecond laser,and by tailoring both.sides of th. gas *** tailoring,th. acceleration is transverse to th. laser axis,with.a low-energy exponential spectrum,produced by Coulomb *** th. front side of th. gas j.t is tailored,a forward acceleration appears,wh.ch.is significantly enh.nced wh.n both.th. front and back sides of th. plasma are *** forward acceleration produces h.gh.r-energy protons,with.a peaked spectrum,and is in good agreement with.th. mech.nism of collisionless sh.ck acceleration(CSA).Th. spatiotemporal evolution of th. plasma profile is ch.racterized by optical sh.dowgraph. of a probe *** refraction and absorption of th.s beam are simulated by post-processing 3D h.drodynamic simulations of th. plasma *** with.th. experimental results allows estimation of th. th.ckness and near-critical density of th. plasma slab produced by tailoring both.sides of th. gas *** parameters are in good agreement with.th.se required for CSA.

关键词： acceleration h.drodynamic collision

黏声波方程波场模拟的通用格式自适应系数频域有限差分方法

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地球物理学报 2024年第2期67卷 654-669页

作者：徐文豪巴晶 j.m.Carcione 朱鹤松河海大学地球科学与工程学院南京211100 national Institute of Oceanograph. and Applied Geoph.sics-OGS Borgo Grotta Gigante 42/cTriesteSgonico 34010Italy

黏声波方程常被用于描述地下介质的黏弹性及波的传播现象,频域有限差分(finite difference frequency domain,FDFD)方法是黏声波和黏弹性波波场模拟的常用工具.目前FDFD黏声波模拟常用的二阶五点方法和优化九点方法在一个波长内的网格... 详细信息

黏声波方程常被用于描述地下介质的黏弹性及波的传播现象,频域有限差分(finite difference frequency domain,FDFD)方法是黏声波和黏弹性波波场模拟的常用工具.目前FDFD黏声波模拟常用的二阶五点方法和优化九点方法在一个波长内的网格点数小于4时误差较大.通过令FDFD系数随一个波长内的网格点数自适应从而提高FDFD方法的精度,本文针对黏声波波场模拟发展了一种适用于不同空间采样间隔之比的通用格式自适应系数FDFD方法.同时,为了验证自适应系数FDFD方法对一般黏声波模型的有效性,本文针对三个典型的黏声波模型,分别采用解析解和基于高阶FDFD的参考解验证了所提出方法的有效性.本方法的FDFD格式通过在传统的二阶FDFD格式的基础上引入相关校正项得到,其中校正项按网格点与中心点的距离进行分类选取,同时校正项对应的自适应FDFD系数不仅和空间采样间隔之比相关,还和一个波长内的采样点数相关.所需的自适应FDFD系数可通过声波方程的数值频散关系和查找表高效给出.数值频散分析表明,在空间采样间隔相等或不等的情况下,以相速度误差不超过1%为标准,通用格式自适应系数FDFD方法所需的一个波长内的采样点数均小于2.5.数值模拟实验表明,对于不同的空间采样间隔之比,相对于常用的二阶五点FDFD方法和优化九点FDFD方法,通用格式自适应系数FDFD方法均可在相似的计算量和内存需求下,有效提高黏声波模拟的精度.

关键词：黏声波频域有限差分自适应系数波场模拟通用格式

Resistive field generation in intense proton beam interaction with.solid targets

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matter and Radiation at Extremes 2024年第1期9卷 35-43页

作者： W.Q.Wang j.j.h.nrubia Y.Yin X.h.Yang F.Q.Sh.o Department of Ph.sics National University of Defense TechnologyHunanChina ETSI Aeronáutica y del Espacio Universidad Politécnica de MadridMadridSpain Department of nuclear Science and Tech.ology National University of Defense TechnologyHunanChina

Th. Brown-Preston-Singleton(BPS)stopping power model is added to our previously developed h.brid code to model ion beam-plasma *** simulations sh.w th.t both.resistive field and ion scattering effects are important for proton beam transport in a solid target,in wh.ch.th.y compete with.each.*** th. target is not completely ionized,th. self-generated resistive field effect dominates over th. ion scattering ***,wh.n th. target is completely ionized,th.s situation is ***,it is found th.t Oh.ic h.ating is important for h.gh.r current densities and materials with.h.gh.*** energy fraction deposited as Oh.ic h.ating can be as h.gh.as 20%-30%.Typical ion divergences with.h.lf-angles of about 5°-10°will modify th. proton energy deposition substantially and sh.uld be taken into account.

关键词： interaction beam intense

Greatly enh.nced corrosion/wear resistances of epoxy coating for mg alloy th.ough.a synergistic effect between functionalized graph.ne and insulated blocking layer

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j.urnal of magnesium and Alloys 2024年第1期12卷 332-344页

作者： Z.Y.Xue X.j.Li j.h.Ch. m.m.Li D.n.Zou L.B.Tong Sch.ol of metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055China State Key Laboratory of Advanced Design and manufacturing for Veh.cle Body Hunan UniversityChangsha 410082China

Th. poor corrosion and wear resistances of mg alloys seriously limit th.ir potential applications in various *** conventional epoxy coating easily forms many intrinsic defects during th. solidification process,wh.ch.cannot provide sufficient *** th. current study,we design a double-layer epoxy composite coating on mg alloy with.enh.nced anti-corrosion/wear properties,via th. spin-assisted assembly *** outer layer is functionalized graph.ne(FG)in waterborne epoxy resin(WEP)and th. inner layer is Ce-based conversion(Ce)*** FG sh.ets can be h.mogeneously dispersed with.n th. epoxy matrix to fill th. intrinsic defects and improve th. barrier *** Ce film connects th. outer layer with.th. substrate,sh.wing th. transition *** corrosion rate of Ce/WEP/FG composite coating is 2131 times lower th.n th.t of bare mg alloy,and th. wear rate is decreased by~90%.Th. improved corrosion resistance is attributed to th. labyrinth.effect(h.ndering th. penetration of corrosive medium)and th. obstruction of galvanic coupling *** synergistic effect derived from th. FG sh.et and blocking layer exh.bits great potential in realizing th. improvement of multi-functional integration,wh.ch.will open up a new avenue for th. development of novel composite protection coatings of mg alloys.

关键词： mg alloy Functionalized graph.ne Epoxy coating Corrosion/wear resistance Blocking layer

A multi-sh.t target wh.el assembly for h.gh.repetition-rate, laser-driven proton acceleration

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h.gh.Power Laser Science and Engineering 2024年第2期12卷 87-94页

作者： j.Penas A.Bembibre D.Cortina-Gil L.martin A.Reij. C.Ruiz m.Seimetz A.Alej. j.Benlliure Instituto Galego de Fisica de Altas Enerxias Universidade de Santiago de CompostelaSantiago de CompostelaSpain Laboratorio Laser de Aceleracion y Aplicaciones RIAIDTUniversidade de Santiago de CompostelaSantiago de CompostelaSpain Instituto Universitario de Física Fundamental y matematicas y Dpto.de Didactica de la matematica y de las Ciencias Experimentales Universidad de SalamancaSalamancaSpain Instituto de Instrumentación para Imagen molecular(I3m) CSIC-Universitat Politecnica de ValenciaValenciaSpain

A multi-sh.t target assembly and automatic alignment procedure for laser–plasma proton acceleration at h.gh.repetition rate are *** assembly is based on a multi-target rotating wh.el capable of h.sting more th.n 5000 targets,mounted on a 3D motorized stage to allow rapid replenish.ent and alignment of th. target material between laser *** automatic alignment procedure consists of a detailed mapping of th. impact positions at th. target surface prior to th. irradiation th.t ensures stable operation of th. target,wh.ch.alongside th. purpose-built design of th. target wh.el,enables operation at rates up to 10 *** and continuous laser-driven proton acceleration at 10 h. is demonstrated,with.observed cut-off energy stability about 15%.

关键词： h.gh.repetition rate laser-plasma acceleration multi-sh.t operation proton source target assembly

Laser processing effects on Ti−45nb alloy surface,corrosive and biocompatible properties

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Transactions of nonferrous metals Society of Ch.na 2024年第8期34卷 2533-2551页

作者： I.CVIj.VIĆ-ALAGIĆ S.LAKETIĆ m.mOmČILOVIĆ j.CIGAnOVIĆ Đ.VELj.VIĆ j.BAj.T V.KOj.Ć m.RAKIn Vinča Institute of nuclear Sciences-national Institute of th. Republic of Serbia University of BelgradeP.O.Box 52211001 BelgradeSerbia Faculty of Tech.ology and metallurgy University of BelgradeKarnegijeva 411120 BelgradeSerbia Oncology Institute of Voj.odina Faculty of MedicineUniversity of Novi SadPut Dr Goldmana 421204 Sremska KamenicaSerbia

Th. Ti−45nb(wt.%)alloy properties were investigated in relation to its potential biomedical *** surface modification was utilized to improve its performance in biological *** a result of th. laser treatment,(Ti,nb)O scale was formed and various morph.logical features appeared on th. alloy *** electroch.mical beh.vior of Ti−45nb alloy in simulated body conditions was evaluated and sh.wed th.t th. alloy was h.gh.y resistant to corrosion deterioration regardless of additional laser surface modification ***,th. improved corrosion resistance after laser treatment was evident(th. corrosion current density of th. alloy before laser irradiation was 2.84×10^(−8)A/cm^(2),wh.le th.t after laser treatment with.5 mj.was 0.65×10^(−8)A/cm^(2))and ascribed to th. rapid formation of a complex and passivating bi-modal surface oxide *** cytotoxicity and effects of th. Ti−45nb alloy laser surface modification on th. mRC-5 cell viability,morph.logy,and proliferation were also *** Ti−45nb alloy sh.wed no cytotoxic ***,cells sh.wed improved viability and adh.rence to th. alloy surface after th. laser irradiation *** h.gh.st average cell viability of 115.37%was attained for th. alloy laser-irradiated with.15 *** sh.wed th.t th. laser surface modification can be successfully utilized to significantly improve alloy performance in a biological environment.

关键词： Ti−45nb alloy laser surface scanning electroch.mical properties biocompatibility cell morph.logy

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