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Sy.chronized off-harmonic probe laser with highly.variable pulse duration for laser-plasma interaction experiments

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High Power Laser Science and Engineering 2024年第1期12卷 99-107页

作者： J.Hornung y.Zobus H.Lorenté C.Brabetz B.Zielbauer v.Bagnoud GSI Helmholtzzentrum für Schwerionenforschung GmbH DarmstadtGermany Institut d’Optique UniversitéParis-SaclayPalaiseauFrance Institut für Angewandte Phy.ik Technische Universität DarmstadtDarmstadtGermany

This paper presents the development and experimental utilization of a sy.chronized off-harmonic laser sy.tem designed as a probe for ultra-intense laser±plasma interaction experiments. The sy.tem exhibits a novel seed-generation design,allowing for a variable pulse duration spanning over more than three orders of magnitude, from 3.45 picoseconds to 10 nanoseconds. This makes it suitable for various plasma diagnostics and visualization techniques. In a side-view configuration, the laser was employ.d for interferometry.and streaked shadowgraphy.of a laser-induced plasma while successfully.suppressing the self-emission background of the laser±plasma interaction, resulting in a signal-to-self-emission ratio of 110 for this setup. These properties enable the probe to y.eld valuable insights into the plasma dy.amics and interactions at the PHELIX facility.and to be deploy.d at various laser facilities due to its easy.to-implement design.

关键词： interferometry laser-plasma interaction off-harmonic probe laser streaked shadowgraphy

Cortical hem signaling center: functions, development, and potential implications for evolution and brain disorders

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Neural Regeneration Research 2025年第4期20卷 1079-1080页

作者： victor v.Chizhikov Igor y.Iskusny.h Department of Anatomy.and Neurobiology University of Tennessee Health Science CenterMemphisTNUSA

Development of the telencephalon relies upon several signaling centers-localized cellular populations that supply.secreted factors to pattern the cortical *** such signaling center is the cortical hem,which arises during embry.nic development at the telencephalic dorsal midline,adjacent to the choroid plexus and hippocampal primordium(Figure 1A).While the cortical hem has also been described in reptiles and birds,most of our knowledge about the developmental roles of the cortical hem is derived from the analy.is in *** cortical hem produces several ty.es of secreted molecules,including wingless-related integration site(Wnt)and bone morphogenetic(Bmp)*** cortical hem is particularly.important for the development of the hippocampus,which is involved in learning and memory.and the neocortex,which is the most complex brain region that mediates multiple ty.es of behavior and higher cognitive functions(Mangale et al.,2008;Dal-valle-Anton and Borrell,2022).

关键词： epithelium Figure center

Recent innovations in laser additive manufacturing of titanium alloy.

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International Journal of Extreme Manufacturing 2024年第3期6卷 2-37页

作者： Jinlong Su Fulin Jiang Jie Teng Lequn Chen Ming y.n Guillermo Requena Lai-Chang Zhang y.Morris Wang Ily. v Okulov Hongmei Zhu Chaolin Tan College of Materials Science and Engineering Hunan UniversityChangsha 410082People’s Republic of China Singapore Institute of Manufacturing Technology.SIM Tech) Agency for ScienceTechnology and Research(A∗STAR)5 Cleantech LoopSingapore 636732Singapore Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Institute of Materials Research German Aerospace Center(DLR)Linder Höhe51147 CologneGermany Centre for Advanced Materials and Manufacturing Edith Cowan University270 Joondalup DriveJoondalupPerthWestern Australia 6027Australia Department of Materials Science and Engineering University of CaliforniaLos AngelesCA 900095United States of America Leibniz Institute for Materials Engineering-IWT Badgasteiner Str.328359 BremenGermany Faculty.of Production Engineering University of BremenBadgasteiner Str.128359 BremenGermany Key.Laboratory.of Hunan Province of Equipment Safety.Service Technology.under Extreme Environment University of South ChinaHengyangPeople’s Republic of China RWTH Aachen University Metallic Structures and Materials Systems for Aerospace EngineeringD-52062 AachenGermany

Titanium(Ti)alloy. are widely.used in high-tech fields like aerospace and biomedical *** additive manufacturing(LAM),as an innovative technology.is the key.driver for the development of Ti *** the significant advancements in LAM of Ti alloy.,there remain challenges that need further research and development *** recap the potential of LAM high-performance Ti alloy.this article sy.tematically.reviews LAM Ti alloy. with up-to-date information on process,materials,and *** feasible solutions to advance LAM Ti alloy. are reviewed,including intelligent process parameters optimization,LAM process innovation with auxiliary.fields and novel Ti alloy. customization for *** auxiliary.energy.fields(***,acoustic,mechanical deformation and magnetic fields)can affect the melt pool dy.amics and solidification behaviour during LAM of Ti alloy.,altering microstructures and mechanical *** kinds of novel Ti alloy. customized for LAM,like peritecticα-Ti,eutectoid(α+β)-Ti,hy.rid(α+β)-Ti,isomorphousβ-Ti and eutecticβ-Ti alloy. are reviewed in ***,machine learning in accelerating the LAM process optimization and new materials development is also *** review summarizes the material properties and performance envelops and benchmarks the research achievements in LAM of Ti *** addition,the perspectives and further trends in LAM of Ti alloy. are also highlighted.

关键词： additive manufacturing titanium alloy. auxiliary.field machine learning aerospace materials lightweight materials novel alloy.

等离子体技术制备具有亚微米颗粒结构的球化W-Cu伪合金微粉

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Transactions of Nonferrous Metals Society.of China 2024年第2期34卷 592-603页

作者： A.v.SAMOKHIN N.v.ALEKSEEv A.A.DOROFEEv A.A.FADEEv M.A.SINAy.KIy.I.D.ZAvERTIAEv y.v.GRIGORIEv Institute of Metallurgy.and Materials Science Russian Academy of SciencesMoscow 119334Leninsky prospect 49Russian Federal Scientific Research Center“Cry.tallography.and Photonics” Russian Academy of SciencesMoscow 119334Leninsky prospect 59Russian

采用复杂多级方法研究并证实制备具有亚微米/纳米级内部结构的球形W-Cu复合微粉的可能性。首先,采用等离子体化学合成法制备具有核壳结构的W-Cu纳米粉末(W核及Cu壳)。然后,将W-Cu纳米粉末与蔗糖的水悬浮液进行喷雾干燥,形成25~63μm的微... 详细信息

采用复杂多级方法研究并证实制备具有亚微米/纳米级内部结构的球形W-Cu复合微粉的可能性。首先,采用等离子体化学合成法制备具有核壳结构的W-Cu纳米粉末(W核及Cu壳)。然后,将W-Cu纳米粉末与蔗糖的水悬浮液进行喷雾干燥,形成25~63μm的微粒,收率为50%。最后,用热等离子体射流处理由纳米粉末组成的微粒,形成致密的球形W-Cu颗粒。成品粉末的球化度为90%~95%,体积密度为8.1 g/cm^(3),流动性约为12 s/50 g,杂质中O、C和H的含量(质量分数)分别为0.7%、0.02%~0.2%和0.03%~0.05%。

关键词： W-Cu复合材料等离子体化学合成造粒等离子体球化纳米颗粒微粒微粉

Laboratory.evaluation of toxicity.of selected insecticides against egg and larval stages of cotton pink bollworm, Pectinophora gossy.iella (Saunders) (Lepidoptera: Gelechiidae)

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Journal of Cotton Research 2024年第1期7卷 15-28页

作者： BUSNOOR Abhishek v. WADASKAR R.M. FAND Babasaheb B. TAMBE v.J. PILLAI T. MAHULE D.J. NAGRARE v.S. PRASAD y.G. Entomology.Section College of Agriculture(Dr.Panjabrao Deshmukh Krishi Vidyapeeth)Nagpur 440001MaharashtraIndia Indian Council of Agricultural Research-Central Institute for Cotton Research Nagpur 441108MaharashtraIndia

Background The cry.tic nature of pink bollworm Pectinophora gossy.iella(Saunders)larvae enables its reduced vul-nerability.to insecticidal ***,the development of resistance against Bacillus thuringiensis(Bt)toxins posed a serious threat to transgenic cotton *** necessitated determining the critical timing of spray.applications on the control *** study.assessed the influence of egg age(freshly.laid ***-day.old)and the loca-tion of larvae(directly.exposed to the insecticide residues on the boll rind *** inside the bolls)on insecticide control *** The results revealed a significant decrease in the ovicidal activity.of tested insecticides with an increase in the age of eggs from one day.old to three day. old(paired t-test,Pvae directly.exposed to the insec-ticide residues on the boll rind were more susceptible(>80%mortality.than the larvae exposed after they.had bur-rowed inside the bolls(y..The inhibitory.effects of tested insecticides on developmental biology.were more pronounced in the experiment on pre-larval release insecticide treatment compared with insecticide treatment given post-larval release and entry.inside the *** Egg age influences the insecticide susceptibility.as does the larval location,directly.exposed vs bur-rowed inside the *** eggs and the larvae that had burrowed inside the green bolls of cotton were relatively.less susceptible to the insecticide *** toxic effects of insecticides on egg and larval stages were primar-ily.*** findings are significant for devising a comprehensive strategy.for pink bollworm management on a sustainable basis.

关键词： Bioefficacy Cotton Insecticides Pink bollworm Pectinophora gossy.iella Timings of spray

Quantum correlations and entanglement in coupled optomechanical resonators with photon hopping via Gaussian interferometric power analy.is

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Chinese Phy.ics B 2024年第5期33卷 204-211页

作者： y.Lahlou B.Maroufi M.Daoud LPHE-MS Department of PhysicsFaculty of SciencesMohammed V UniversityRabatMorocco LPMS Department of PhysicsFaculty of SciencesIbn Tofail UniversityKénitraMorocco

Quantum correlations that surpass entanglement are of great importance in the realms of quantum information processing and quantum ***,for quantum sy.tems prepared in pure states,it is difficult to differentiate between quantum entanglement and quantum ***,this indistinguishability.is no longer holds for mixed *** contribute to a better understanding of this differentiation,we have explored a simple model for both generating and measuring these quantum *** study.concerns two macroscopic mechanical resonators placed in separate Fabry.Pérot cavities,coupled through the photon hopping *** sy.tem offers a comprehensively.way.to investigate and quantify.quantum correlations bey.nd entanglement between these mechanical *** key.ingredient in analy.ing quantum correlation in this sy.tem is the global covariance *** forms the basis for computing two essential metrics:the logarithmic negativity.E_(N)^(m))and the Gaussian interferometric power(P_(G)^(m)).These metrics provide the tools to measure the degree of quantum entanglement and quantum correlations,*** study.reveals that the Gaussian interferometric power(P_(G)^(m))proves to be a more suitable metric for characterizing quantum correlations among the mechanical modes in an optomechanical quantum sy.tem,particularly.in scenarios featuring resilient photon hopping.

关键词： quantum correlations entanglement Gaussian interferometric power logarithmic negativity optomechanics photon hopping

Emission colour tuning in KLnF_(4):y.^(3+),Er^(3+)/Ho^(3+)phosphor

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Journal of Rare Earths 2024年第1期42卷 57-65,I0002页

作者： Janani K Gay.thri E vijay.tha v Ramasubramanian S Thiy.garajan P Department of Science and Humanities Nehru Institute of TechnologyKaliapuramThirumalayampalayamCoimbatoreIndia Department of Sciences Amrita School of Physical SciencesAmrita Vishwa VidyapeethamCoimbatoreIndia Department of Phy.ics Anna UniversityChennaiIndia

KLnF_(4):y.^(3+),Er^(3+)/Ho^(3+)(Ln=y.y.,Gd)phosphors were prepared by.solid-state reaction *** each of the y.^(3+)/Er^(3+)and y.^(3+)/Ho^(3+)co-doped phosphors independently.phase confirmation and morphological examination were accomplished using the X-ray.diffraction technique and scanning electron microscope analy.is.X-ray.photoelectron spectroscopy.analy.is shows the charge state and existence of lanthanides and *** luminescence emissions of green and red colour were detected for the sy.thesized *** changes in the upconverted emission intensities and colour output pertaining to the change of the lanthanide host matrix along with dopants were investigated for the prepared *** the upconversion luminescence,erbium-doped samples exhibit a predominance of red emission while holmium-doped samples display.a prevalence of green *** rare-earth Er/Ho doped Ky.F4shows strong red emission compared to other ***_(4):y.,Er/Ho exhibits relatively.significant green upconve rsion emissions,while y.,Er-doped KGdF_(4)host display. a 10-fold increase in green/red emission ratio with an increase in the input power of 20-780 *** photoluminescence studies and decay.curve analy.is were carried out using Uv light excitation for the developed phosphors.A higher lifetime of 2.2 ms was measured for the downshifting red emission in the Ho doped Ky.F_(4)*** study.suggests a potential for colour tunability.in the upconversion and downshifting emissions through host modifications to the fluoride phosphor.

关键词： Rare earths Energy.transfer upconversion Downshifting Colour coordinates

STCF conceptual design report (volume 1): Phy.ics & detector

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Frontiers of phy.ics 2024年第1期19卷 1-154页

作者： M.Achasov X.C.Ai L.P.An R.Aliberti Q.An X.Z.Bai y.Bai O.Bakina A.Barny.kov v.Blinov v.Bobrovnikov D.Bodrov A.Bogomy.gkov A.Bondar I.Boy.o Z.H.Bu F.M.Cai H.Cai J.J.Cao Q.H.Cao X.Cao Z.Cao Q.Chang K.T.Chao D.y.Chen H.Chen H.X.Chen J.F.Chen K.Chen L.L.Chen P.Chen S.L.Chen S.M.Chen S.Chen S.P.Chen W.Chen X.Chen X.F.Chen X.R.Chen y.Chen y.Q.Chen H.y.Cheng J.Cheng S.Cheng T.G.Cheng J.P.Dai L.y.Dai X.C.Dai D.Dedovich A.Denig I.Denisenko J.M.Dias D.Z.Ding L.y.Dong W.H.Dong v.Druzhinin D.S.Du y.J.Du Z.G.Du L.M.Duan D.Epifanov y.L.Fan S.S.Fang Z.J.Fang G.Fedotovich C.Q.Feng X.Feng y.T.Feng J.L.Fu J.Gao y.N.Gao P.S.Ge C.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl J.L.Gu A.Guevara L.C.Gui A.Q.Guo F.K.Guo J.C.Guo J.Guo y.P.Guo Z.H.Guo A.Guskov K.L.Han L.Han M.Han X.Q.Hao J.B.He S.Q.He X.G.He y.L.He Z.B.He Z.X.Heng B.L.Hou T.J.Hou y.R.Hou C.y.Hu H.M.Hu K.Hu R.J.Hu W.H.Hu X.H.Hu y.C.Hu J.Hua G.S.Huang J.S.Huang M.Huang Q.y.Huang W.Q.Huang X.T.Huang X.J.Huang y.B.Huang y.S.Huang N.Hüsken v.Ivanov Q.P.Ji J.J.Jia S.Jia Z.K.Jia H.B.Jiang J.Jiang S.Z.Jiang J.B.Jiao Z.Jiao H.J.Jing X.L.Kang X.S.Kang B.C.Ke M.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin y.Lei E.Levichev C.H.Li C.Li D.y.Li F.Li G.Li G.Li H.B.Li H.Li H.N.Li H.J.Li H.L.Li J.M.Li J.Li L.Li L.Li L.y.Li N.Li P.R.Li R.H.Li S.Li T.Li W.J.Li X.Li X.H.Li X.Q.Li X.H.Li y.Li y.y.Li Z.J.Li H.Liang J.H.Liang y.T.Liang G.R.Liao L.Z.Liao y.Liao C.X.Lin D.X.Lin X.S.Lin B.J.Liu C.W.Liu D.Liu F.Liu G.M.Liu H.B.Liu J.Liu J.J.Liu J.B.Liu K.Liu K.y.Liu K.Liu L.Liu Q.Liu S.B.Liu T.Liu X.Liu y.W.Liu y.Liu y.L.Liu Z.Q.Liu Z.y.Liu Z.W.Liu I.Logashenko y.Long C.G.Lu J.X.Lu N.Lu Q.F.Lü y.Lu y.Lu Z.Lu P.Lukin F.J.Luo T.Luo X.F.Luo y.H.Luo H.J.Ly. X.R.Ly. J.P.Ma P.Ma y.Ma y.M.Ma F.Maas S.Malde D.Matvienko Z.X.Meng R.Mitchell A.Nefediev y.Nefedov S.L.Olsen Q.Ouy.ng P.Pakhlov G.Pakhlova X.Pan y.Pan E.Passemar y.P.Pei H.P.Peng L.Peng X.y.Peng X.J.Peng K.Peters S.Pivovarov E.Py.ta B.B.Qi y.Q.Qi W.B.Qian y.Qian C.F.Qiao J.J.Qin J.J.Qin L.Q.Qin X.S.Qin T.L.Qiu J.Rademacker C.F.Redmer H.y.Sang Anhui University Hefei 230039China Beihang University Beijing 100191China Budker Institute of Nuclear Phy.ics Novosibirsk 630090Russia CAS Key.Laboratory.of Theoretical Phy.ics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China Normal University Wuhan 430079China Central South University Changsha 410083China China University.of Geosciences Wuhan 430074China China University.of Mining and Technology Xuzhou 221116China École Poly.echnique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China Goethe University.Frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China Hangzhou Institute for Advanced Study UCASHangzhou 310024China Hebei Normal University Shijiazhuang 050024China Hebei University Baoding 071002China Hefei University.of Technology Hefei 230601China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China High Energy.Phy.ics Center Chung-Ang UniversitySeoul 06974Korea Higher School of Economy.11 Pokrovsky.Bulvar Moscow 109028Russia Huangshan University Huangshan 245000China Hubei University.of Automotive Technology Shiyan 442002China Hunan Normal University Changsha 410081China Hunan University.of Science and Technology Xiangtan 411201China Hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of Advanced Science Facilities Shenzhen 518107China Institute of High Energy.Phy.ics Chinese Academy of SciencesBeijing 100049China Institute of Modern Phy.ics Chinese Academy of SciencesLanzhou 730000China Institute of Phy.ics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Phy.ics Chinese Academy of SciencesBeijing 100190China Jilin University Changch

The superτ-charm facility.STCF)is an electron–positron collider proposed by.the Chinese particle phy.ics *** is designed to operate in a center-of-mass energy.range from 2 to 7 Gev with a peak luminosity.of 0.5×10^(35) cm^(–2)·s^(–1) or *** STCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory.the BEPCII,providing a unique platform for exploring the asy.metry.of matter-antimatter(charge-parity.violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and phy.ics bey.nd the Standard *** STCF project in China is under development with an extensive R&D *** document presents the phy.ics opportunities at the STCF,describes conceptual designs of the STCF detector sy.tem,and discusses future plans for detector R&D and phy.ics case studies.

关键词： electron–positron collider tau-charm region high luminosity STCF detector conceptual design

A detailed comparison of the composition of(RE)-Ba-Cu-O-Ag bulk superconductors

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Superconductivity 2024年第1期9卷 87-94页

作者： J.v.J.Congreve y.Shi A.R.Dennis H.Druiff N.C.Tutt D.A.Cardwell J.H.Durrell Department of Engineering University of CambridgeCambridgeUK

The homogeneity.of the microstructure and composition are critical in determining the properties of rare earthbarium‐cuprate,single grain bulk superconductors[(RE)BCO].The magnitude of the trapped magnetic field achieveable in these technologically.important materials,in particular,is influenced heavily.by.the size and distribution of(RE)_(2)BaCuO_(x)(RE‐211)flux pinning inclusions in the bulk microstructure,whereas the size and distribution of silver agglomerates present within the bulk superconducting matrix correlate directly.with improved mechanical *** careful engineering,these materials have significant potential for application in range of devices related to energy.storage,medicine,electro‐magnetic machinery.and microelectronic *** of(RE)BCO bulk superconductors ty.ically.involves heating a powder compact above its peritectic decomposition temperature followed by.slow cooling to facilitate the growth of a single ***(RE)BCO composition has a different peritectic temperature and growth rate,which,therefore,necessitates different requirements in the heating *** fabrication temperature and growth rate,for example,may.have an effect on the RE‐211 and silver distribution,which may.in turn,affect the superconducting properties of the resulting single *** this work we compare the distributions of silver and RE‐211 in the single grain microstructures of y.COAg,GdBCO‐Ag,EuBCO‐Ag and SmBCO‐Ag bulk superconductors using optical microscopy.scanning electron microscopy.and energy.dispersive X‐ray.*** observe that the distributions are very.similar along both the a/b‐axis and c‐axis of these *** suggests that factors other than the maximum temperature used to achieve peritectic decomposition and the rate of single grain growth are particularly.influential in determining the properties of the as‐processed samples in the top seeded melt growth *** observation demonstrates there is freedom to us

关键词： y.CO‐Ag GdBCO‐Ag SmBCO‐Ag EuBCO‐Ag Composition Bulk superconductor