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高能物理与核物理 1989年第4期13卷 298-301页

作者：郁庆长中国科学院高能物理研究所

空间电荷透镜的聚焦特性决定于其电子云的大小、形状和密度分布.本文利用数值与解析方法讨论了这些参量.

关键词：空间电荷透镜电子云轴对称

CMS muon trigger system

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CMS muon trigger system

On the knee of Galactic cosmic rays in light of sub-TeV spectral hardenings

第13届全国计算机、网络在现代科学技术领域的应用学术会议

作者： Mingshui Chen Chunhua Jiang (institute of high energy physics,Beijing,100049)

The LHC at CERN will provide proton-proton collisions at a centre-of-mass energy of 14 TeV with a bunch crossing space of *** will reach IGHz for inelastic proton-proton interaction rate at the design luminosity of *** CMS experiment has a multi-level trigger system to reduce this rate to about *** architecture of muon trigger system is described.

关键词： CMS muon trigger

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Chinese physics C 2018年第7期42卷 113-122页

作者： Yi-Qing Guo1 2 Qiang Yuan1 3 1. Key Laboratory of Dark Matter and Space Astronomy Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210008 China 2. Key Laboratory of Particle Astrophysics institute of high energy physics Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of Sciences Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of Sciences School of Astronomy and Space Science University of Science and Technology of China

More than fifty years after the discovery of the knee in the cosmic ray （CR） spectra, its physical origin remains a mystery. This is partly due to the ambiguity of the energy spectra of individual components. Recently, direct measurements from several space experiments found significant spectral hardenings of CR nuclei at ~200 GV. A joint modeling of the direct and indirect measurements may help to understand the experimental systematics and the physics of the knee. In this work, we update the phenomenological ＂poly-gonato＂ model to include the spectral hardenings, with a changing spectral index of γ ＋ β·logE. This modification gives a reasonable description of the CR spectra in a wide energy range. However, the fits to different data sets give different results. We find that the fit to the AMS-02 and CREAM data slightly favors a relatively low energy knee of the light components. In such a case, the expected all-particle spectra under-shoot the data, which may require an extra component of CRs. The fits to AMS-02 data and the light component （H＋He） data from the Tibet ASγ/ARGO-YBJ/WFCTA and KASCADE experiments give consistent results with the all-particle spectra. We further propose a possible physical realization of such a ＂modified poly-gonato＂ model of spectral hardenings by means of spatially-dependent diffusion of CRs. We find reasonably good agreement between the model predictions and the data for CR spectra, the secondary-to-primary ratios, and the amplitude of anisotropies.

关键词： cosmic ray knee spectrum propagation

CMS Computing on Grid

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CMS Computing on Grid

ON AN EXPERIMENTAL SUGGESTION TO TEST THE PROBLEM OF 'HIDDEN PARAMETERS' IN OUANTUM THEORY

第13届全国计算机、网络在现代科学技术领域的应用学术会议

作者： Wen Guan Gongxing Sun (institute of high energy physics,Beijing,100049)

CMS has adopted a distributed system of services which implement CMS application view on top of Grid *** overview of CMS services will be *** is on CMS data management and workload Management.

关键词： Grid Computing CMS

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Science in China,Ser.A 1977年第6期 740-741页

作者：何祚庥 institute of high energy physics Academia Sinica

Are there 'hidden parameters' in quantum theory? This problem has been discussed repeatedly by physicists and debated vigorously by the philosophers of materialistic and idealistic viewpoints. We suggest a kind of exp... 详细信息

关键词： ON AN EXPERIMENTAL SUGGESTION TO TEST THE PROBLEM OF HIDDEN PARAMETERS IN OUANTUM THEORY

A study on the sharp knee and fine structures of cosmic ray spectra

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Science China(physics,Mechanics & Astronomy) 2010年第5期53卷 842-847页

作者： WANG Bo1,YUAN Qiang1,FAN Chao1,2,ZHANG JianLi1,HU HongBo1 & BI XiaoJun1 1 Key Laboratory of Particle Astrophysics,institute of high energy physics,Chinese Academy of Sciences,Beijing 100049,China 2 Department of physics,Shandong University,Jinan 250100,China Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Beijing China Department of physics Shandong University Jinan China

The paper investigates the overall and detailed features of cosmic ray(CR) spectra in the knee region using the scenario of nuclei-photon interactions around the acceleration *** supernova remnants can be the physical realities of such kind of CR acceleration *** results show that the model can well explain the following problems simultaneously with one set of source parameters:the knee of CR spectra and the sharpness of the knee,the detailed irregular structures of CR spectra,the so-called"component B"of Galactic CRs,and the electron/positron excesses reported by recent *** coherent explanation serves as evidence that at least a portion of CRs might be accelerated at the sources similar to young supernova remnants,and one set of source parameters indicates that this portion mainly comes from standard sources or from a single source.

关键词： cosmic ray knee fine structures e+e-excesses "component B" single source

EFFECT OF HYDROGEN ABSORPTION ON MAGNETIC PROPERTIES OF AMORPHOUS Fe_(90-x) V_x Zr_(10) ALLOYS

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Acta Metallurgica Sinica(English Letters) 1989年第7期2卷 55-60页

作者： DUO Liang XU Zuxiong MA Ruzhang Beijing University of Science and Technology,Beijing.China institute of high energy physics,Academia Sinica,P.O.Box 2732,Beijing,China

The amorphous Fe_(90-x)V_xZr_(10) alloy after electolytic hydrogenation procedure was studied by means of Mossbauer effect,magnetic measurement.X-ray diffaction and secondary ion mass spectroscopy(SIMS)*** experimental results show that the magnetic properties of amorphous Fe_(90-x)V_xZr_(10) alloy are highly sensitive to the presence of hydrogen. The isomer shift(IS)has a small positive change and the magnetic properties transfer from paramagnetic to ferromagnetic State by hydrogenation,and the effect of hydrogen absorption is to raise Fe magnetic moment(from the increase of saturation maguetization)and Curie temperature T_c from 257 to 384 *** considerable increase of magnetic properttes of amorphous Fe_(90-x)V_xZr_(10) alloy by hydrogenation is attributable to the change of hybridization effect between outer electrons of Zr atoms and 3d electrons of Fe *** the results of SIMS experiment,it is concluded that the hydrogen atoms is localized around Zr atoms wheh hydrogen atoms enter into the allor.

关键词： amorphous alloy hydrogenation magnetic property

Nucleon Correlations of the Neutrinoless Double Beta Decay in ^(76)Ge

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Chinese journal of nuclear physics 1994年第1期16卷 1-5页

作者： Wu Huifang(institute of high energy physics.Academia Sinica.Beijing 100039)(institute of Theoretical physics,Academia Sinica,Beijing 100080) 中科院高能物理所北京 100039

It is shown that the contributions of the short-range correlation and the nu-clear core polarization to the neutrinoless double beta decay in 76Ge are quite impor-tant,especially in the heavy neutrino case.

关键词： Short-range correlation Nuclear core polarization Neutrino

Correlation of Behavior Changes and BOLD Signal in Alzheimer-like Rat Model

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Acta Biochimica et Biophysica Sinica 2004年第12期36卷 803-810页

作者： Zheng-Hui HU#, Xiao-Chuan WANG1#, Li-Yun LI3, Mai-Li LIU3, Rong LIU1, Zhiqun LING1, Qing TIAN1, Xiao-Wei TANG, Yi-Gen WU2*, and Jian-Zhi WANG1* Department of physics and Bio-X disciplinary Laboratory, Zhejiang University, Hangzhou 310027,China 1 Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China 2institute of high energy physics and Key Laboratory of Nuclear Analysis Techniques, Chinese Academy of Sciences, P.O. Box 918, Beijing 100039, China 3Wuhan institute of physics and Mathematics, State Key Laboratory of Magnetic Resonance and Atomic and Molecular physics, Chinese Academy of Sciences, Wuhan 430071, China Department of physics and Bio-X disciplinary Laboratory Zhejiang UniversityHangzhou 310027China Department of Pathophysiology Tongji Medical College Huazhong University of Science and TechnologyWuhan 430030 China Wuhan institute of physics and Mathematics State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Chinese Academy of SciencesWuhan 430071 China institute of high energy physics and Key Laboratory of Nuclear Analysis Techniques Chinese Academy of SciencesP.O. Box 918 Beijing 100039 China

To explore a potential means for the early diagnosis of Alzheimer disease, we studied the relationship of resting T2* signal and tau hyperphosphorylation/spatial memory deficit. The rat model with tau hyperphosphorylation and spatial memory deficit was established by bilateral hippocampi injection of isoproterenol (IP). Then, the correlative alteration between resting T2* signal and spatial memory retention was assessed with blood oxygenation level dependent (BOLD) functional magnetic resonance imaging (fMRI) study and Morris Water Maze test, and Western blot was employed to confirm tau hyperphosphorylation. The analysis showed following results. (1) Tau phosphorylation at Ser396/Ser404 and Ser199/Ser202 was signifi- cantly increased in IP-injected rats as detected by PHF-1 and tau-1, respectively. (2) An AD-like spatial memory retention disturbance was induced at 24 h after isoproterenol injection. (3) A sensitivity threshold of resting T2* signal intensity, which separated the IP-treated rats from vehicle control, was obtained by applying linear regression analysis, and an estimated sensitivity statistical threshold was at 32.62. These results suggest that resting T2* signal may serve as a noninvasive quantitative marker in predicting AD-like spatial memory deficits and tau hyperphosphorylation.

关键词： Alzheimer disease (AD) functional magnetic resonance imaging (fMRI) isoproterenol (IP) Morris Water Maze diagnosis

Status of Baryon Spectroscopy and Possible N Program at Lanzhou CSR

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Status of Baryon Spectroscopy and Possible N Program at Lanz...