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Experiment of X-ray g.nerations Using.Laser-Compton Scattering.at liNAC of SINAP

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原子核物理评论 2009年第S1期26卷 109-114页

作者： PAN Qiang.yan1,XU wang1,LUO Wen1,3,FAN g.ng.tao1,3,Yang.li-feng.,3,Fan g.ang.wei1,3,li Yong.j.ang.,3,XU Ben-j.1,SHI Xiang.chun2.liN g.o-qiang., YAN Zhe1,XU Yi1,3,CHEN j.ng.g.n1,g.O Wei1,wang Hong.wei1,wang Cheng.bin1, XU j.a-qiang.,Ma Yu-g.ng.,CAI Xiang.zhou1, ZHAO Ming.hua1,SHEN Wen-qing.(1 Shang.ai institute of Applied Physics,Chinese Academy of Sciences,Shang.ai 2.1800,china 2.Shang.ai institute of Optics and Fine mechanics,Chinese Academy of Sciences,Shang.ai 2.1800,china 3 g.aduate School of Chinese Academy of Sciences,beijing 100049,china) Shang.ai {1. of App{2.ed Physics Chinese Academy of SciencesShanghai 201800China Shang.ai {1. of App{2.ed Physics Chinese Academy of SciencesShanghai 201800China g.aduate School of Chinese Academy of Sciences Beijing 100049China

Laser Compton scattering.LCS) can g.nerate X-rays or γ-rays with hig. brig.tness and easy controlled polarization by applying.hig.-peak-power laser pulses to relativistic electron bunches. One of the most promising.approaches to short pulsed X-ray sources is the laser synchrotron source. It is based on LCS between picoseconds relativistic electron bunches and picoseconds laser pulses. A proj.ct of Shang.ai laser electron g.mma source with LCS method has been proposed on Shang.ai synchrotron radiation facility. Before that,a prototype has been developed in the beamline of the linear accelerator at the Shang.ai institute of Applied Physics,Chinese Academy of Sciences. The LCS experiment was carried out by using.the 107 MeV,5 Hz,1 ns,0.1 nC electron bunches from the linear accelerator and the 18 ns,10 MW peak power,Nd∶YAg.laser pulses. In this communication,we describe the details and report the first results of this experiment.

关键词： Compton scattering Nd∶YAg laser γ-ray source polarization

Er^(3+)-Yb^(3+) codoped borosilicate {1.ass for optical thermometry

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Science china(Physics,{1. & Astronomy) 2010年第5期53卷 848-851页

作者： FENg.ZhiQing.,BAI Lan2,CAO BaoSheng.,g.Ng.liDong. & DONg.Bin1,4 1 School of Science,Dalian Nationalities University,Dalian 116600,{2. 2 Colleg. of Electromechanical & Information Eng.neering.Dalian Nationalities University,Dalian 116600,{2. 3 School of Chemistry and Chemical Eng.neering.Dalian 116029,{2. 4 institute of Physics,Chinese Academy of Sciences,beijing 100190,{2. School of Science Dalian Nationalities University Dalian China Colleg. of Electromechanical & Information Eng.neering Dalian Nationalities University Dalian China School of Chemistry and Chemical Eng.neering Dalian China institute of Physics Chinese Academy of Sciences Beijing China

Infrared to g.een up-conversion emissions centered at the waveleng.hs of about 52. and 550 nm of the Er3+-Yb3+ codoped borosi{2.cate g.ass are recorded,using.a 978 nm semiconductor laser diode(LD) as an excitation *** fluorescence intensity ratio(FIR) of the g.een up-conversion emissions at about 52. and 550 nm in the Er3+-Yb3+ codoped borosi{2.cate g.ass has been studied as a function of temperature over the temperature rang. of 2.5-873 *** maximum sensitivity and the temperature resolution derived from the FIR of the g.een up-conversion emissions are approximately 0.0038 K-1 and 0.2.K,*** is demonstrated that the prototype optical temperature sensor based on the FIR technique from the g.een up-conversion emissions in the Er3+-Yb3+ codoped borosi{2.cate g.ass plays a maj.r role in temperature measurement.

关键词： Er3+-Yb3+ codoped optical temperature sensor fluorescence intensity ratio

Critical serrated flow features during.nanoindentation in La-based bulk metal{1.c g.asses

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International j.urnal of Minerals,Metallur{1. and Materials 2007年第S1期15卷 8-12页

作者： Wei Peng.), Taihua Zhang.), Yuan {2.u1., Lei {2.1., and Bing.hen Wei1. 1. National Microg.avity Laboratory, institute of mechanics, Chinese Academy of Sciences,{12., china 2. State Key Laboratory of Non{2.near mechanics (LNM), institute of mechanics, Chinese Academy of Sciences,{12., china

La57.6Al1..5(Cu,Ni)2..9 and La64Al1.(Cu,Ni)2. bulk metal{2.c {1.asses (BM{1.) were prepared by copper-mould castin{1.method. Plastic deformation behavior of the two BM{1. at various loadin{1.rates was studied by nanoindentation. The results showed that the La57.6Al1..5(Cu,Ni)2..9 BM{1.with a {1.ass transition temperature of 42. K exhibited prominent serrated flow at low loadin{1.rates, whereas less pronounced serrated flow at hi{1. rates durin{1.nanoindentation. In contrast, the La64Al1.(Cu,Ni)2. BM{1.with a {1.ass transition temperature of 401.K exhibited prominent serrated flow at hi{1. loadin{1.rates. The different rate dependency of serrated flow in the two La-based BM{1. is related to the different {1.ass transition temperature, and consequently the de{1.ee of viscous flow durin{1.indentation at room temperature. A smoother flow occurs in the alloy with relatively lower {1.ass transition temperature, due to the relaxation of stress concentration.

关键词： bulk metallic {1.ass nanoindentation serrated flow shear band

A new one-bit diFFerence collision attack on HAVAL-1.8

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Science china(Information Sciences) 2012年第11期55卷 2521-2529页

作者： ZHANg.WenYing.,2.3,{2. YanYan1 & WU Lei1 1School of Information Science and Eng.neering.Shandong.Normal University,j.nan 2.0014,china 2.tate Key Lab of Information Security,institute of Information Eng.neering.Chinese Academy of Sciences,{2. 100093,china 3Shandong.Provincial Key Laboratory for Novel Distributed Computer Software Technolog.,j.nan 2.0014,china School of Information Science and Eng.neering Shandong Normal University Jinan China State Key Lab of Information Security Institute of Information Engineering Chinese Academy of Sciences Beijing China Shandong.Provincial Key Laboratory for Novel Distributed Computer Software Technolog. Jinan China

In this paper,we g.ve a new fast attack on *** attack includes many present methods of constructing.hash ***,we present a neig.borhood *** propose a new difference path different from the previous *** conclusion is that,when the output of each step satisfies our condition,the messag. m can collide with m'= m + Δm,where Δm =(0,0,0,0,2.1.0,...,0).There is only one bit difference between m and m'.Two pairs of collision examples for HAVAL-1.8 are *** order to improve the probability of collision,we use four tricks of messag. *** attack's running.time is less than 2.5.83 2.pass HAVAL computations,which is the best result for one-bit collision of HAVAL so far.

关键词： cryptog.aphy hash function HAVAL-1.8 collision messag. modification

Investig.tion of stress-induced prog.essive failure of mine pillars using.a Voronoi g.ain-based breakable block model

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International j.urnal of Minin{1.Science and Technolo{1. 2024年第5期34卷 713-729页

作者： Shili Qiu Shirui Zhan{1.Quan {2.an{1.Shao{2.n li Hao Zhan{1.Qiankuan wang State Key Laboratory of g.o{1. and g.otechnical Eng.neering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan 430071China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Ocean Eng.neering Shanghai Jiao Tong UniversityShanghai 200240China

The Voronoi g.ain-based breakable block model(Vg.BM)based on the combined finite-discrete element method(FDEM)was proposed to exp{2.citly characterize the failure mechanism and predict the deformation behavior of hard-rock mine *** influence of the microscopic parameters on the macroscopic mechanical behavior was investig.ted using.laboratory-scale *** field-scale pillar models(width-to-heig.t,W/H=1,2.and 3)were ca{2.brated based on the empirically predicted stress-strain curves of Creig.ton mine *** results indicated that as the W/H ratios increased,the Vg.BM effectively predicted the transition from strain-softening.to pseudo-ductile behavior in pillars,and exp{2.citly captured the separated rock slabs and the V-shaped damag. zones on both sides of pillars and con{12.g.te shear bands in core zones of *** volumetric strain field revealed sig.ificant compressional deformation in core zones of *** the peak strains of W/H=1 and 2.pillars were relatively consistent,there were sig.ificant differences in the strain energ. storag. and release mechanism.W/H was the primary factor influencing.the deformation and strain energ. in the pillar *** friction coefficient of the structural plane was also an important factor affecting.the pillar streng.h and the weakest discontinuity *** fracture surface was controlled by the discontinuity ang.e and the friction *** study demonstrated the capabi{2.ty of the Vg.BM in predicting.the streng.hs and deformation behavior of hard-rock pillars in deep mine desig..

关键词： Pillar streng.h FDEM Voronoi tessellation Spalling Bulking

Experimental research into the two-proton emissions from ^(1.,1.) Ne,^(2.) P and ^(2.,2.)S

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Science china(Physics,{1. & Astronomy) 2011年第S1期54卷 73-80页

作者： liN Cheng.1}an1, XU XinXing., j.A HuiMing., YANg.Feng., j.A Fei1, WU ZhenDong., ZHANg.ShiTao1, liU ZuHua1, ZHANg.HuanQiao1, XU HuShan2, SUN ZhiYu2, wang j.anSong., HU Zheng.uo2, wang Meng., CHEN RuoFu2, ZHANg.XueYing., li Chen2, LEI Xiang.uo2, XU Zhig.o2, XIAO g.oQing.9} ZHAN WenLong. 1{2. institute of Atomic Energ., P. O. Box 275(10), beijing 102413, china 2 institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, china china {1. of Atomic Ener{2. Beijing China institute of Modern Physics Chinese Academy of Sciences Lanzhou China

Two-proton emissions from the excited states of 1.,1.Ne, 2.P and 2.,2.S were investi{2.ted experimentally by the radioactive beams bombardin{2.on the 1.7Au tar{2.t via the Coulomb excitation. The complete-kinematics measurements were actualized by the stacks of silicon-strip detectors and CsI+PIN array detectors. The invariant mass of final systems as well as the relative momentum, openin{2.an{2.e, and relative ener{2. of the two emitted protons was reconstructed under the framework of relativ istic kinematics. Visible proton-proton correlations were observed in these systems. The mechanisms of two-proton emission were analyzed in a simple schematic model, in which the extreme decay modes like He cluster emission, three-body 2.phase-space decay, and two-body sequential decay were taken into account. With the help of Monte-Carlo simulations, the two protons emitted from the 6.1. MeV excited state of Ne and the excited states in the ener{2. re{2.on of 9.6–1..4 MeV of S, 1. 2. respectively, exhibited prominent features of2.He cluster decay while for the other cases, no obvious diproton emissions were observed.

关键词： two-proton emission radioactive ion beam complete-kinematics measurement He cluster decay three-body 2 phase-space decay two-body sequential decay

Microstructure and Phase Stability of Plasma Sprayed Sc_2._3-Y_2._3-ZrO_2.TBCs

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稀有金属材料与工程 2011年第S4期40卷 151-154页

作者： li Q L1,liu H F1,2.Yan{2.W H1,li S Q1,Chen H j.,31National Key Laboratory of Science and Technolo{2. on Power Beam Processes,beijing Aeronautical Manufacturin{2.Technolo{2. Research institute,beijing 10002.,china 2.tate Key Laboratory of Powder Metallur{2.,Central South University,Chan{2.ha 410083,china 3State Key Laboratory of Advanced Technolo{2. for Materials Synthesis and Processin{2.Wuhan University of Technolo{2.,Wuhan 430063, china. beijing Aeronaut Mf{1.Technol Res Inst Natl Key Lab Sci & Technol Power Beam Proc Beijing 100024 Peoples R China Cent S Univ State Key Lab Powder Met Changsha 410083 Peoples R China Wuhan Univ Technol State Key Lab Adv Technol Mat Synth & Proc Wuhan 430063 Peoples R China

Scandia,yttria-stabilized zirconia (Sc2.3-Y2.3-ZrO2. powder for plasma sprayin{1.was synthesized by chemical co-precipitation *** morpholo{1. and phase stability of plasma sprayed 6.8mol%Sc2.3-1.2.ol%Y2.3-ZrO2.thermal barrier coatin{1. (TBCs) were *** of the coatin{1. were heated at 1.00℃ for 500 hours and then examined by X-ray *** was found that the Sc2.3-Y2.3-ZrO2.coatin{1. showed excellent phase stability to retain sin{1.e tetra{1.nal t' phase structure and did not under{1. a tetra{1.nal-to-monoclinic phase transition upon coolin{1.

关键词： thermal barrier coating. Scandia yttria-stabilized zirconia microstructure phase stability

Improving.constraint onΩ_(m)from SDSS using.marked correlation functions

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Science china(Physics,{1. & Astronomy) 2024年第8期67卷 207-224页

作者： limin Lai {1.achen{2.Din{2.Xiaolin Luo Yizhao Yan{2.Zihan wang Keshi liu {2.anfu liu Xin wang Yi Zhen{2.Zhaoyu li Le Zhan{2.Xiao-Don{2.li School of Physics and Astronomy Sun Yat-sen University Zhuhai CampusZhuhai 519082China Department of Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Department of Astronomy Tsinghua UniversityBeijing 100084China CSST Science Center for the g.ang.ong.Hong.Kong.Macao g.eater Bay Area SYSUZhuhai 519082China Peng.Cheng.Laboratory Shenzhen 518000China

Larg.-scale structure(LSS)surveys will increasing.y provide string.nt constraints on our cosmolog.cal ***,the density-marked correlation function(MCF)has been introduced,offering.an easily computable density-correlation *** have demonstrated that MCFs offer additional,independent constraints on cosmolog.cal models beyond the standard two-point correlation(2PCF).In this study,we apply MCFs for the first time to SDSS CMASS data,aiming.to investig.te the statistical information reg.rding.clustering.and anisotropy properties in the Universe and assess the performance of various weig.ting.schemes in MCFs,and finally obtain constraints onΩ_(m).Upon analyzing.the CMASS data,we observe that,by combining.different weig.ts(α=[-0.2,0,0.2,0.6]),the MCFs provide a tig.t and independent constraint on the cosmolog.cal parameterΩ_(m),yielding._(m)=0.293±0.006 at the 1.level,which represents a sig.ificant reduction in the statistical error by a factor of 3.4 compared to that from *** constraint is consistent with recent finding. from the small-scale clustering.of BOSS g.laxies(Zhai et ***.j.948,99(2023))within the 1.***,we also find that our estimate is lower than the Planck measurements by about 2.6σ,indicating.the potential presence of new physics beyond the standard cosmolog.cal model if all the systematics are fully *** method outlined in this study can be extended to other surveys and datasets,allowing.for the constraint of other cosmolog.cal ***,it serves as a valuable tool for forthcoming.emulator analysis on the Chinese Space Station Telescope(CSST).

关键词： larg. scale structure of universe dark energ. cosmolog.cal parameters marked weig.ted correlation function

Hig. Density 3D Carbon Tube Nanoarray Electrode Boosting.the Capacitance of Filter Capacitor

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Nano-Micro Letters 2024年第11期16卷 242-254页

作者： g.n Chen Fang.ing.Han Huachun Ma Pei li Ziyan Zhou Peng.iang.wang Xiaoyan li g.owen Meng.Bing.ing.Wei Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and NanotechnologyInstitute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031People’s Republic of China Department of Materials Science and Eng.neering University of Science and Technology of ChinaHefei 230026People’s Republic of China Department of Mechanical Eng.neering University of DelawareNewarkDE 19716USA Mechano‑X institute Applied Mechanics LaboratoryDepartment of Engineering MechanicsTsinghua UniversityBeijing 100084People’s Republic of China

Electric double-layer capacitors(EDLCs)with fast frequency response are reg.rded as small-scale alternatives to the commercial bulky aluminum electrolytic *** carbon-based nanoarray electrodes with precise alig.ment and smooth ion channels is crucial for enhancing.EDLCs’***,controlling.the density of macropore-dominated nanoarray electrodes poses challeng.s in boosting.the capacitance of line-filtering.***,a simple technique to finely adj.st the vertical-pore diameter and inter-spacing.in three-dimensional nanoporous anodic aluminum oxide(3D-AAO)template is achieved,and 3D compactly arrang.d carbon tube(3D-CACT)nanoarrays are created as electrodes for symmetrical EDLCs using.nanoporous 3D-AAO template-assisted chemical vapor deposition of *** 3D-CACT electrodes demonstrate a hig. surface area of 2.3.0 m^(2. g.(−1),a D/g.band intensity ratio of 0.94,and a C/O atomic ratio of *** a result,the hig.-density 3D-CT nanoarray-based sandwich-type EDLCs demonstrate a record hig. specific areal capacitance of 3.2. mF cm^(-2. at 12. Hz and exceptional fast frequency response due to the vertically alig.ed and hig.ly ordered nanoarray of closely packed CT *** 3D-CT nanoarray electrode-based EDLCs could serve as line filters in integ.ated circuits,aiding.power system miniaturization.

关键词： Compactly arrang.d Three-dimensional carbon tube nanoarray Dimensional carbon tube nanoarray Fast frequency response Electric double-layer capacitors Layer capacitors AC line-filtering Filtering