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Fast efficient photon deceleration in plasmas by using two laser pulses at different frequencies

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Matter and Radiation at Extremes 2024年第3期9卷 11-18页

作者： Y.x.wang x.L.Zhu S.M.Weng P.Li x.F.Li h.Ai h.R.Pan Z.M.Sheng Key Laboratory for Laser Plasmas(moe) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghai 200240China Research Center of Laser Fusion of China Academy of Engineering Physics MianyangSichuan 621900China State key Laboratory of high Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Tsung-dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China

The generation of ultrashort high-power light sources in the mid-infrared(mid-IR)to terahertz(Thz)range is of interest for applications in a number of fields,from fundamental research to biology and *** conventional laser technology,photon deceleration in plasma wakes provides an alternative approach to the generation of ultrashort mid-IR or Thz ***,we present a photon deceleration scheme for the efficient generation of ultrashort mid-IR or Thz pulses by using an intense driver laser pulse with a relatively short wavelength and a signal laser pulse with a relatively long *** signal pulse trails the driver pulse with an appropriate time delay such that it sits at the front of the second wake bubble that is driven by the driver *** to its relatively long wavelength,the signal pulse will be subjected to a large gradient of the refractive index in the plasma wake ***,the photon deceleration in the plasma wake becomes faster and more efficient for signal pulses with longer *** greatly enhances the capacity and efficiency of photon deceleration in the generation of ultrashort high-power light sources in the long-wavelength IR and Thz spectral ranges.

关键词： laser ultrashort photon

Isolation of a Bluetongue virus group-specific monoclonal antibody and application to a diagnostic competitive ELISA

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Isolation of a Bluetongue virus group-specific monoclonal an...

中国畜牧兽医学会兽医病理学分会第二十一次学术研讨会暨中国病理生理学会动物病理生理专业委员会第二十次学术研讨会

作者： Q.Y.xu E.C.Sun Y.F.Feng S.Lv Q.Zhang h.x.wang D.L.Wu The Key Laboratory of Veterinary Public health Ministry of Agriculture State Key Laboratory of Veterinary Biotechnology Harbin Veterinary Research InstituteCAAS

Object:Bluetongue (BT) disease is caused by infection with Bluetongue virus(BTV).The mortality rate can be as high as 50–70%in certain sheep ***,we describe the BTV VP7 group-specific Mab4h7 and identify the key amino acid residues in the VP7 protein that contribute to a conformational *** we developed a competitive enzyme-linked immunosorbent assay(c ELISA)using Mab 4h7 and recombinant BTV VP7 protein.

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high Efficiency Dye-Sensitized Solar Cells Based on Solid-state Composite Electrolyte

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High Efficiency Dye-Sensitized Solar Cells Based on Solid-st...

2004全国太阳能光化学与光催化学术会议

作者： h.x.wang, B. F. xue, Z.x.wang, h.Li, Q.B. Meng. x. J.huang, L.Q.Chen (Beijing National Laboratory for Condensed Matter Physics Institute of Physics, Chinese Academy of Sciences, Beijing 100080. China)

＜正＞ A novel solid-state electrolyte composed of LiI and hPN and ceramic oxide for dye-sensitized solarcells（DSSC）has been prepared and *** ionic conductivity of the electrolyte reaches to 10-3S/cm at room temperature determined by impedance spectroscopy and the conductivity behavior obeys theArrihenius law（Figure 1）.Single crystal structure of the compound formed by LiI/hPN indicates thatiodide spreads orderly in *** these results suggest that the electrolyte is probably a good

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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.honrubia Y.Yin x.h.Yang F.Q.Shao Department of Physics National University of Defense TechnologyHunanChina ETSI Aeronáutica y del Espacio Universidad Politécnica de MadridMadridSpain Department of Nuclear Science and Technology National University of Defense TechnologyHunanChina

The Brown-Preston-Singleton(BPS)stopping power model is added to our previously developed hybrid code to model ion beam-plasma *** simulations show that both resistive field and ion scattering effects are important for proton beam transport in a solid target,in which they compete with each *** the target is not completely ionized,the self-generated resistive field effect dominates over the ion scattering ***,when the target is completely ionized,this situation is ***,it is found that Ohmic heating is important for higher current densities and materials with high *** energy fraction deposited as Ohmic heating can be as high as 20%-30%.Typical ion divergences with half-angles of about 5°-10°will modify the proton energy deposition substantially and should be taken into account.

关键词： interaction beam intense

Solid State Dye-Sensitized Solar Cell

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Solid State Dye-Sensitized Solar Cell

2004年中国材料研讨会

作者： Q.B.Meng,h.x.wang,B.F.xue,x.Z.Liu,Z.Y.Zheng,J.G Tao,h.L.An,h.Li,Z.x.wang x.J.huang,L.Q.Chen Beijing National Laboratory for Condensed Matter Physics Institute of Physics,Chinese Academy of Sciences,Beijing,100080,China

＜正＞Due to the low cost,comparable efficient solar light to electricity conversion and easy fabrication compared to conventional inorganic photovoltaic devices,dye-sensitized solar cells （DSSCs） are currently attracting wide-spread scientific and technological interest. The DSSCs is constructed with three parts:dye molecules as photosensitizers,nanocrystalline TiO2 porous film as the electron-transport layer and a redox electrolyte as the "hole-transport layer". 10% of light-to-electricity conversion efficiency has been achieved by DSSC fabricated with organic liquid based electrolyte. however,the leakage and evaporation of the organic solvent will cause the reducing performance of the cell in the long-term operation due to difficulty in sealing the cell.

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Precipitation of multi-type nano-quasicrystals in a Mg-Zn-Y alloy

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Journal of Magnesium and Alloys 2024年第3期12卷 997-1008页

作者： W.Z.wang x.Z.Zhou L.F.Zhang h.Q.Ye Z.Q.Yang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of ScienceShenyang 110016China Ji hua Laboratory Foshan 528251China Foshan University Foshan 528231China

Mg-6Zn-1Y(at.%)ribbons with strengthening precipitates of multi-type nanoquasicrystals were prepared by melt-spinning followed by aging *** evolution of the rapidly solidified ribbons during isothermal aging was comprehensively studied using various electron microscopy *** new kinds of decagonal quasicrystals were formed in aged ribbons,in addition to precipitation of nanometer icosahedral ***-resolution observations reveal that both decagonal quasicrystals can be modeled by quasiperiodic tiling with decagonal clusters of 2.5 nm in diameter,but overlap of neighboring clusters in both decagonal quasicrystals is different from the Gummelt model observed in other quasicrystals.A shell composed of complex Laves Mg-Zn domains was formed surrounding each decagonal quasicrystal precipitate upon prolonged *** addition,all kinds of nanoprecipitates exhibit excellent structure and size stability at 573 *** findings may have implications for not only fundamental studies about quasicrystals,but also microstructural manipulation of high-performance Mg alloys.

关键词： Quasicrystal Mg alloys Rapid solidification Scanning-transmission electron microscopy.

In situ TEM investigation of electron irradiation and aging-induced high-density nanoprecipitates in an Mg-10Gd-3Y-1Zn-0.5Zr alloy

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Journal of Magnesium and Alloys 2024年第5期12卷 1841-1853页

作者： M.Lv h.L.Ge Q.Q.Jin x.h.Shao Y.T.Zhou B.Zhang x.L.Ma Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Materials Science and Engineering Research Center Guangxi University of Science and TechnologyLiuzhou 545006China

In-situ electron irradiation and aging are applied to introduce high-density precipitates in an Mg-10Gd-3Y-1Zn-0.5Zr(GWZ1031K,wt.%)alloy to improve the *** results show that the hardness of the Mg alloy after irradiation for 10 h and aging for 9 h at 250℃ is 1.64 GPa,which is approximately 64% higher than that of the samples before being *** is mainly attributed to γ'precipitates on the basal plane after irradiation and the high-density nanoscale β'precipitates on the prismatic plane after aging,which should be closely related to the irradiation-induced homogenous *** latter plays a key role in precipitation *** result paves a way to improve the mechanical properties of metallic materials by tailoring the precipitation through irradiation and aging.

关键词： Mg alloy Electron beam irradiation hardening Precipitates In-situ TEM

Electron kinetic effects in back-stimulated Raman scattering bursts driven by broadband laser pulses

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Matter and Radiation at Extremes 2024年第4期9卷 54-67页

作者： Q.K.Liu L.Deng Q.wang x.Zhang F.Q.Meng Y.P.wang Y.Q.Gao h.B.Cai S.P.Zhu Graduate School China Academy of Engineering PhysicsBeijing 100088China Institute of Applied Physics and Computational Mathematics Beijing 100094China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China Shanghai Institute of Laser Plasma Shanghai 201800China hEDPS Center for Applied Physics and TechnologyPeking UniversityBeijing 100871China School of Physics Zhejiang UniversityHangzhou 310027China

We examine electron kinetic effects in broadband-laser-driven back-stimulated Raman scattering(BSRS)bursts using particle-in-cell *** bursts occur during the nonlinear stage,causing reflectivity spikes and generating large numbers of hot ***-duration simulations are performed to observe burst events,and a simplified model is developed to eliminate the interference of the broadband laser’s random intensity *** the simplified model,we isolate and characterize the spectrum of electron plasma *** spectrum changes from a sideband structure to a turbulence-like structure during the burst.A significant asymmetry in the spectrum is *** asymmetry is amplified and transferred to electron phase space by high-intensity broadband laser pulses,leading to violent vortex-merging and generation of hot *** proportion of hot electrons increases from 6.76%to 14.7%during a single violent burst *** demonstrate that kinetic effects profoundly influence the BSRS evolution driven by broadband lasers.

关键词： scattering kinetic simplified