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Beamline design for multipurpose muon beams at CSNS EMuS

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Nuclear Science and Techniques 2024年第5期35卷 1-12页

作者： Yang Hong Ying-peng Song Lu-Ping Zhou Jing-Yu tang Zhi-Hao Zhou Nikolaos Vassilopoulos Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China University of chinese academy of sciences Beijing 100049China Radiotherapy Physics and Technology Center Cancer CenterWest China HospitalSichuan UniversityChengdu 610041China Xi’an Jiaotong University Health Science Center Xi’an 710049China Department of Radiation Oncology First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710049China school of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China

A new muon beam facility,called the Experimental Muon Source(EMuS),was proposed for construction at the china Spallation Neutron Source(CSNS).The design of the complex muon beamlines for the EMuS baseline scheme,which is based on superconducting solenoids,superferric dipoles and room-temperature magnets,is presented *** muon beams,including surface muons,decay muons and low energy muons,have been developed for multipurpose *** optics design and simulation results of the trunk beamline and branch beamlines are *** a proton beam power of 25 kW at a standalone target station that consists of a conical graphite target and high-field superconducting solenoids,the muon beam intensity in the trunk beamline varies from 10^(7)/s for surface muons to 10^(10)/s for high-momentum decay *** at the endstations,these values vary from 10^(5)/s for surface muons to 10^(8)/s for decay muons.

关键词： Surface muons Decay muons Muon beamline Superconducting solenoids Multi-channel electrostatic separator

Interface optimization of graphene paper-Cu composite prepared by electrodeposition

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Journal of Iron and Steel Research International 2024年第1期31卷 64-73页

作者： Jing Guo Hai-jing Wang Shuang-juan Liu peng Zhang Jing-yu tang Wei-yang Zhang Han-jie Guo peng-cheng Wang Cai Meng school of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China Institute of High Energy Physics Chinese Academy of SciencesBeijing100049China Advanced Technology and Materials Co. Ltd.Beijing100083China school of Nuclear Science and Technology University of Science and Technology of ChinaHefei230027AnhuiChina

A room-temperature electrodeposition method with an organic electrolyte was developed to fabricate a HNO3-pretreated graphene paper Cu(GP'-Cu)*** improve the interfacial bonding of GP'-Cu composite,magnetron sputtering technology was used to create a"sandwich"structural gradient GP'-Cu *** selection of the intermediate transition layer metal was based on two-dimensional *** electron microscopy,X-ray photoelectron spectroscopy,and other analytical methods confirmed that the addition of an intermediate transition metal(Cr,Ni)layer reduced the gap distance and enhanced the interfacial bonding of the GP'and Cu deposited *** GP'-Ni-Cu composite exhibited the largest increase in tensile strength and *** addition,it had the highest thermal diffusivity and elongation at break among the GP'-Cu,GP'-Cr-Cu and GP'-Ni-Cu composites.

关键词： Graphene paper Two-dimensional disregistry Magnetron sputtering Metal composite

Age and fluid source constraints of the Haoyaoerhudong orogenic gold deposit,North china:Evidence from geochronology and noble gas isotopes

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Geoscience Frontiers 2024年第4期15卷 176-195页

作者： Chenglong Fan Jingwen Mao Huishou Ye Yitian Wang Junchen Liu Wei Jian Xuyang Meng Wenhao tang Weiwei Chao peng Wang school of Earth sciences and Resources China University of GeosciencesBeijing 100083China MNR Key Laboratory for Exploration Theory&Technology of Critical Mineral Resources China University of GeosciencesBeijing 100083China Ministry of Natural Resources(MNR)Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources by the Province and Ministry Guilin University of TechnologyGuilin 541004China State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013JiangxiChina school of Earth sciences and Spatial Information Engineering Hunan University of Science and TechnologyXiangtan 411201China

The Haoyaoerhudong gold deposit,located in the northwestern part of the North china craton(NCC),has produced over 120 metric tonnes(t)of gold since *** has a total reserve of>240 t at average gold grade of 0.62 g/t,making it one of the largest open pit gold mines in *** steeply dipping,large-tonnage,low-grade,vein-or veinlet-type gold orebodies are hosted in strongly-deformed Mesoproterozoic carbonaceous schist of the Bayan Obo *** laminated/boudinaged veins/veinlets in the sinistral ductile-brittle shear zones are dominated by quartz,biotite,gold-bearing löllingite,pyr-rhotite,(arseno)pyrite,with minor native gold,titanite and *** this paper,we present new in situ U-Pb geochronological data on magmatic zircon from the preore dikes,on metamorphic and hydrothermal xenotime,and on hydrothermal titanite from the hydrothermally altered carbonaceous schist and auriferous quartzsulfides veins/veinlets,as well as He-Ar isotopic analysis on gold-bearing(arseno)pyrite in the syn-ore *** metamorphic xenotime U-Pb age of 426±6.0 Ma(2σ)records a regional metamorphic event,possibly related to the accretion of the Bainaimiao arc onto the *** pre-ore andesitic dikes yielded similar emplacement ages at~278 Ma constrained by laser ablation-inductively coupled plasma-mass spectrometry(LA-ICP-MS)U-Pb zircon *** xenotime grains from the altered carbonaceous schist and auriferous quartz-sulfides veins yielded U-Pb ages of 256.0±4.1 Ma(2σ)and 254.4±2.1 Ma(2σ),respectively,overlapping with that of the hydrothermal titanite at 255.4±0.8 Ma(2σ)from the laminated quartz-sulfides *** indicates that the gold mineralization occurred at ca.255 ***~255 Ma gold mineralization age is much younger than the previously reported Early-Middle Permian regional magmatic activity(ca.291 Ma to 268 Ma),and may be associated with the regional sinistral strike-slip event in the late orogenic cycle related to the collision between the Siberian craton

关键词： Xenotime Titanite In situ U-Pb dating Noble gas Orogenic gold deposit North china Craton

A peak enhancement of frequency response of waveguide integrated silicon-based germanium avalanche photodetector

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Journal of Semiconductors 2024年第7期45卷 61-68页

作者： Linkai Yi Daoqun Liu Wenzheng Cheng Daimo Li Guoqi Zhou peng Zhang Bo tang Bin Li Wenwu Wang Yan Yang Zhihua Li Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China school of Electronic Electrical and Communication Engineering University of Chinese Academy of SciencesBeijing 100049China

Avalanche photodetectors(APDs) featuring an avalanche multiplication region are vital for reaching high sensitivity and responsivity in optical transceivers. Waveguide-coupled Ge-on-Si separate absorption, charge, and multiplication(SACM)APDs are popular due to their straightforward fabrication process, low optical propagation loss, and high detection sensitivity in optical communications. This paper introduces a lateral SACM Ge-on-Si APD on a silicon-on-insulator(SOI) wafer, featuring a 10 μm-long, 0.5 μm-wide Ge layer at 1310 nm on a standard 8-inch silicon photonics platform. The dark current measures approximately 38.6 μA at-21 V, indicating a breakdown voltage greater than-21 V for the device. The APDs exhibit a unitgain responsivity of 0.5 A/W at-10 V. At-15 V, their responsivity reaches 2.98 and 2.91 A/W with input powers of-10 and-25 dBm, respectively. The device's 3-dB bandwidth is 15 GHz with an input power of-15 dBm and a gain is 11.68. Experimental results show a peak in impedance at high bias voltages, attributed to inductor and capacitor(LC) circuit resonance, enhancing frequency response. Furthermore, 20 Gbps eye diagrams at-21 V and-9 dBm input power reveal signal to noise ratio(SNRs) of 5.30. This lateral SACM APD, compatible with the stand complementary metal oxide semiconductor(CMOS) process,shows that utilizing the peaking effect at low optical power increases bandwidth.

关键词： photodetectors optical communications responsivity 3-dB bandwidth

fMRI time series analysis based on stationary wavelet and spectrum analysis

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Progress in Natural Science:Materials International 2006年第11期16卷 1171-1176页

作者： ZHI Lianhe~ 1,2,3 , ZHAO Xia~4, SHAN Baoci~1**, peng Silong~5, YAN Qiang~1, YUAN Xiuli~1 and tang Xiaowei~ 1,6 (1. Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, chinese academy of sciences, beijing 100049, china 2. graduate school of chinese academy of sciences, beijing 100049, china 3. Department of Physics, Zhoukou Normal University, Zhoukou 466100, china 4. Research Imaging Center, University of Texas Health Science Center, San Antonio, Texas 78229, USA 5. National ASIC Design and Engineering Center, Institute of Automation, chinese academy of sciences, beijing 100049, china 6. Department of Physics, Zhejiang University, Hangzhou 310027, china) [a]Key Laboratory of Nuclear Analysis Techniques Institute of High Energy Physics Chinese Academy of Sciences Beijing China [b]graduate school of chinese academy of sciences Beijing China [c]Department of Physics Zhoukou Normal University Zhoukou China [d]Research Imaging Center University of Texas Health Science Center San Antonio Texas USA [e]National ASIC Design and Engineering Center Institute of Automation Chinese Academy of Sciences Beijing China [f]Department of Physics Zhejiang University Hangzhou China

The low signal to noise ratio (SNR) of functional MRI (fMRI) prefers more sensitive data analysis methods. Based on stationary wavelet transform and spectrum analysis, a new method with high detective sensitivity was developed for analyzing fMRI time series, which does not require any prior assumption of the characteristics of noises. In the proposed method, every component of fMRI time series in the different time-frequency scales of stationary wavelet transform was discerned by the spectrum analysis, then the components from noises were removed using the stationary wavelet transform, finally the components of real brain activation were detected by cross-correlation analysis. The results obtained from both simulated and in vivo visual experiments illustrated that the proposed method has much higher sensitivity than the traditional cross-correlation method.

关键词： fMRI stationary wavelet transform spectrum analysis data analysis.

Integrability Condition on an Almost Complex Structure and Its Application

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Acta Mathematica Sinica,English Series 2005年第6期21卷 1459-1464页

作者： chia kuei peng Zi Zhou tang(Zizhou tang) Department of mathematics Graduate School The Chinese Academy of Sciences Beijing 100039 P. R. China school of Mathematical sciences Beijing Normal University Beifing 100875 P. R. China Department of Mathematical sciences Tsinghua University Beijing 100084 P. R. China

We obtain and apply a simple form of the integrability condition of an almost complex structure to the Hopf manifolds.

关键词： almost complex structure integrability

The Roadmap of 2D Materials and Devices Toward Chips

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Nano-Micro Letters 2024年第6期16卷 343-438页

作者： Anhan Liu Xiaowei Zhang Ziyu Liu Yuning Li Xueyang peng Xin Li Yue Qin Chen Hu Yanqing Qiu Han Jiang Yang Wang Yifan Li Jun tang Jun Liu Hao Guo Tao Deng Songang peng He Tian Tian‑Ling Ren school of Integrated Circuits and beijing National Research Center for Information Science and Technology(BNRist) Tsinghua UniversityBeijing 100049People’s Republic of China school of Microelectronics Fudan UniversityShanghai 200433People’s Republic of China State Key Laboratory of Dynamic Measurement Technology Shanxi Province Key Laboratory of Quantum Sensing and Precision MeasurementNorth University of ChinaTaiyuan 030051People’s Republic of China High‑Frequency High‑Voltage Device and Integrated Circuits R&D Center Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029People’s Republic of China school of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044People’s Republic of China school of Integrated Circuits University of Chinese Academy of SciencesBeijing 100049People’s Republic of China IMECAS-HKUST-Joint Laboratory of Microelectronics Beijing 100029People’s Republic of China

Due to the constraints imposed by physical effects and performance degra certain limitations in sustaining the advancement of Moore’s ***-dimensional(2D)materials have emerged as highly promising candidates for the post-Moore era,offering significant potential in domains such as integrated circuits and next-generation ***,in this review,the progress of 2D semiconductors in process engineering and various electronic applications are summarized.A careful introduction of material synthesis,transistor engineering focused on device configuration,dielectric engineering,contact engineering,and material integration are given *** 2D transistors for certain electronic applications including digital and analog circuits,heterogeneous integration chips,and sensing circuits are ***,several promising applications(artificial intelligence chips and quantum chips)based on specific mechanism devices are ***,the challenges for 2D materials encountered in achieving circuit-level or system-level applications are analyzed,and potential development pathways or roadmaps are further speculated and outlooked.

关键词： Two-dimensional materials Roadmap Integrated circuits Post-Moore era

Loss of the accessory chromosome converts a pathogenic tree-root fungus into a mutualistic endophyte

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Plant Communications 2024年第1期5卷 164-180页

作者： Huanshen Wei Zhenhui Zhong Zhongfeng Li Yuwei Zhang Eva H.Stukenbrock Boping tang Ningning Yang Riccardo Baroncelli Long peng Zhuo Liu Xinghua He Yuzhan Yang Zhilin Yuan State Key Laboratory of Tree Genetics and Breeding Chinese Academy of ForestryBeijing 100091China Research Institute of Subtropical Forestry Chinese Academy of ForestryHangzhou 311400China State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops Fujian Agriculture and Forestry UniversityFuzhou 350002China Environmental Genomics Christian-Albrechts University24118 KielGermany Max Planck Fellow Group Environmental Genomics Max Planck Institute for Evolutionary Biology24306 PlonGermany Jiangsu Key Laboratory for Bioresources of Saline Soils School of WetlandsYancheng Teachers UniversityYancheng 224002China Department of Agricultural and Food sciences(DISTAL) University of Bologna40127 BolognaItaly

Some fungal accessory chromosomes(ACs)may contribute to virulence in ***,the mecha-nisms by which ACs determine specific traits associated with lifestyle transitions along a symbiotic contin-uum are not *** we delineated the genetic divergence in two sympatric but considerably variable isolates(16B and 16W)of the poplar-associated fungus Stagonosporopsis *** identified a-0.6-Mb horizontally acquired AC in 16W that resulted in a mildly parasitic lifestyle in *** deletion of the AC(D16W)significantly altered the fungal ***,D16W was morphologically more similar to 16B,showed enhanced melanization,and established beneficial interactions with poplar plants,thereby acting as a dark septate *** sequencing(RNA-seq)analysis showed that AC loss induced the upregulation of genes related to root colonization and biosynthesis of indole acetic acid and *** observed that the AC maintained a more open status of chromatin across the genome,indicating an impressive remodeling of cis-regulatory elements upon AC loss,which potentially enhanced symbiotic *** demonstrated that the symbiotic capacities were non-host-specific through comparable experiments on Triticum–and Arabidopsis–fungus ***,the three isolates generated symbiotic interactions with a nonvascular *** summary,our study suggests that the AC is a suppressor of symbiosis and provides insights into the underlying mechanisms of mutualism with vascular plants in the absence of traits encoded by the *** speculate that AC-situ-ated effectors and other potential secreted molecules may have evolved to specifically target vascular plants and promote mild virulence.

关键词： dark septate endophytes effectors lifestyle transition root–fungus symbioses

Acute Effects of Exposure to Fine Particulate Matter and Its Constituents on Sex Hormone Among Postmenopausal Women — beijing, Tianjin, and Hebei PLADs, china, 2018–2019

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china CDC weekly 2024年第13期6卷 249-253,I0001-I0004页

作者： Yanlin Tian Jiaonan Wang Jianlong Fang Chen Chen Feng Zhao Yi Zhang peng Du Yawei Li Wanying Shi Yuanyuan Liu Enmin Ding Song tang Xu Yue Xiaoming Shi chinese Research academy of Environmental sciences BeijingChina Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control(AEMPC)Nanjing University of Information Science&TechnologyNanjing CityJiangsu ProvinceChina china CDC Key Laboratory of Environment and Population Health National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijingChina Department of Epidemiology and Health Statistics School of Public HealthCapital Medical Universityand Beijing Municipal Key Laboratory of Clinical EpidemiologyBeijingChina National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijingChina

What is already known on this topic?Exposure to fine particulate matter(PM_(2.5))was linked to endocrine hormone disruption in the reproductive ***,it was unclear which specific components of PM_(2.5) were primarily responsible for these *** is added by this report?The study presented the initial epidemiological evidence that brief exposure to PM_(2.5) can elevate estradiol levels in postmenopausal *** particle components had unique effects,with watersoluble ions and specific inorganic elements like Ag,As,Cd,Hg,Ni,Sb,Se,Sn,and Tl potentially playing significant roles in increasing estradiol *** are the implications for public health practice?The study established that the prevalence of air pollution,along with its specific components,has been recognized as a novel risk factor affecting the balance of sex hormones.

关键词： pollution Particulate primarily