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arXiv 2022年

作者： Li, Jingang Zhang, Di Guo, Zhongyuan Jiang, Xi Larson, Jonathan M. Zhu, Haoyue Zhang, Tianyi Gu, Yuqian Blankenship, Brian Chen, Min Wu, Zilong Huang, Suichu Kostecki, Robert Minor, Andrew M. Grigoropoulos, Costas P. Akinwande, Deji Terrones, Mauricio Redwing, Joan M. Li, Hao Zheng, Yuebing Materials Science & Engineering Program Texas Materials Institute Walker Department of Mechanical Engineering The University of Texas at Austin AustinTX78712 United States Laser Thermal Laboratory Department of Mechanical Engineering University of California BerkeleyCA94720 United States Tohoku University Sendai980-8577 Japan Materials Sciences Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Department of Chemistry and Biochemistry Baylor University WacoTX76798 United States Department of Materials Science and Engineering The Pennsylvania State University University ParkPA16802 United States Chandra Family Department of Electrical & Computer Engineering The University of Texas at Austin AustinTX78712 United States Department of Materials Science and Engineering University of California BerkeleyCA94720 United States Energy Storage and Distributed Resources Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States National Center for Electron Microscopy Molecular Foundry Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Center for Two-Dimensional and Layered Materials The Pennsylvania State University University ParkPA16802 United States Department of Physics Department of Chemistry The Pennsylvania State University University ParkPA16802 United States 2D Crystal Consortium Materials Research Institute The Pennsylvania State University University ParkPA16802 United States

C-H bond activation enables the facile synthesis of new chemicals. While C-H activation in short-chain alkanes has been widely investigated, it remains largely unexplored for long-chain organic molecules. Here, we report light-driven C-H activation in complex organic materials mediated by 2D transition metal dichalcogenides (TMDCs) and the resultant solid-state synthesis of luminescent carbon dots in a spatially-resolved fashion. We unravel the efficient H adsorption and a lowered energy barrier of C-C coupling mediated by 2D TMDCs to promote C-H activation. Our results shed light on 2D materials for C-H activation in organic compounds for applications in organic chemistry, environmental remediation, and photonic materials. © 2022, CC BY-NC-SA.

关键词： Chemical activation

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The critical role of electrochemically activated adsorbates in neutral OER

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science China materials 2020年第12期63卷 2509-2516页

作者： Longsheng Zhang Haiyang Yuan Liping Wang Hui Zhang Yijing Zang Yao Tian Yunzhou Wen Fenglou Ni Hao Song Haifeng Wang Bo Zhang Huisheng Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science and Laboratory of Advanced MaterialsFudan UniversityShanghai 200438China Key Laboratory for Advanced Materials Key Laboratory for Advanced MaterialsCentre for Computational Chemistry and Research Institute of Industrial CatalysisEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesCAS Center for Excellence in Superconducting ElectronicsShanghai 200050China Key Laboratory of Systems Bioengineering School of Chemical Engineering and TechnologySynBio Research PlatformCollaborative Innovation Centre of Chemical Science and EngineeringTianjin UniversityTianjin 300072China

Developing efficient electrocatalysts for the oxygen evolution reaction(OER)under neutral conditions is important for microbial electrolysis cells(MECs).However,the OER kinetics in neutral electrolytes at present are extremely sluggish,resulting in high overpotentials that greatly limit the energy conversion efficiencies of *** studies failed to probe the adsorbates on surface metal sites of catalysts at the atomic scale and elucidate their influence on the catalytic activities,which has impeded the rational design of efficient neutral OER catalysts with optimal surface ***,using in situ transmission electron microscopy(TEM),in situ X-ray photoelectron spectroscopy(XPS)and in situ low-energy ion scattering studies,we have identified,for the first time,that the electrochemically activated adsorbates on surface metal sites play a critical role in boosting the neutral OER activities of Ru-Ir binary oxide(RuxIryO2)*** adsorbate-activated RuxIryO2on a glassy carbon electrode achieved a low overpotential of 324 m V at10 m A cm-2in neutral electrolyte,with a 36-fold improvement in turnover frequency compared with that of Ir *** application in an MEC system,the resulting full cell showed a decreased voltage of 1.8 V,200 m V lower than the best value reported to date,facilitating efficient synthesis of poly(3-hydroxybutyrate)from bioelectrochemical *** functional theory(DFT)studies revealed that the enhanced OER activity of RuxIryO2catalyst arose from local structural distortion of adjacent adsorbate-covered Ru octahedra at the catalyst surface and the consequently decreased adsorption energies of OER intermediates on Ir active center.

关键词： electrocatalysis oxygen evolution reaction adsorbates neutral electrolytes

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Co-incineration of multiple inorganic solid wastes towards clean disposal: Heat and mass transfer modeling, pollutant generation, and machine learning based proportioning

Green Energy and Resources

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Green Energy and Resources 2024年第3期2卷

作者： Chen, Guanyi Chen, Guandong Li, Jingwei Pan, Queyi Liang, Daolun Qiu, Jie Zhao, Xiqiang Wang, Xiaojia Li, Zhongshan Li, Xiangping Ma, Xiaoling Wu, Shuang Sun, Yunan School of Mechanical Engineering Tianjin University of Commerce Tianjin 300134 China Tianjin Key Lab of Biomass/Wastes Utilization Tianjin Engineering Research Center for Organic Wastes Safe Disposal and Energy Utilization School of Environmental Science and Engineering Tianjin University Tianjin 300350 China School of Ecology and Environment Tibet University Lhasa 850012 China Shandong Engineering Laboratory for Solid Waste Green Materials National Engineering Laboratory for Reducing Emissions from Coal Combustion Engineering Research Center of Environmental Thermal Technology of Ministry of Education Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization School of Energy and Power Engineering Shandong University Jinan 250014 China Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and Environment Southeast University Nanjing 210096 China School of Nuclear Science and Technology Xi'an Jiaotong University Xi'an 710049 China State Key Laboratory of Engines Tianjin University Tianjin 300354 China Lund Univ Dept Phys Combust Phys Lund Sweden College of Chemical and Biological Engineering Shandong University of Science and Technology Shandong Qingdao 266590 China Birmingham Centre for Energy Storage School of Chemical Engineering University of Birmingham Birmingham B15 2TT United Kingdom

The co-disposal of solid waste by industrial kilns is presently attracting increasing attention. In this study, we investigate the co-disposal of solid waste, i.e. converter ash (CA), sintered ash (SA), blast furnace bag ash (BA), and municipal solid waste incineration fly ash (MSWIFA), under simulated blast furnace ironmaking conditions. The results show that it is feasible to use blast furnace to treat MSWIFA, but the stability of temperature field should be controlled in the process of co-disposal. With the increase of temperature, the conversion rate of NO decreased to 16.4%, and ZnFe₂O₄ became the main mineral composition, accounting for 75.53%. Corresponding to the flue gas corrosion condition of solid waste treatment, it is found that the corrosion resistance of the furnace material TH347H is better than 20G. Finally, based on the experimental data, the nested optimization algorithm of machine learning model is established to achieve the reverse output of optimal conditions. Overall, the study provides theoretical support and methodology guidance for the co-disposal of solid waste in blast furnaces in providing support for the further development of co-disposal of solid waste in industrial kilns. © 2024 The Authors

关键词： Blast furnace Co-disposal Heat and mass transfer Machine learning Pollution mechanism

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Misfit layer SnTiS3: An assemble-free van der Waals heterostructure SnS/TiS2 for lithium ion battery anode

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Journal of Power Sources 2021年 494卷 229712-229712页

作者： Huang, Yue-E Lin, Weilin Shi, Chenguang Li, Li Fan, Kaiqing Huang, Xiao-Ying Wu, Xiaohui Du, Ke-Zhao College of Chemistry and Materials Science Fujian Provincial Key Laboratory of Polymer Materials Fujian Normal University Fuzhou350007 China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences FuzhouFujian350002 China State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 China Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical Engineering Nanjing University Nanjing210023 China

Misfit layer SnTiS3 (STS) crystal as a bulk van der Waals (vdW) heterostructure SnS/TiS2 is developed as a superior anode material for lithium-ion batteries (LIBs). STS can combine the advantages of metallic character of TiS2 layers and high lithium-storage of SnS layers. Moreover, graphene oxide (GO) is adopted to support STS via a hand-grinding route. A strong binding between STS and GO is conducive to decreasing the crystalline domain size of STS. Besides, the in-situ electrochemical reduction of GO nanosheets during the first cycling could offer a conductive network for both ions and electrons. Consequently, the electrochemical performance of STS/GO is superior than that of pristine STS and STS/rGO (rGO = reduced GO), and outstanding among the latest reports of SnS- or TiS2-based on LIBs anodes. Specifically, STS/GO anode delivers a capacity of 614 mA h g−1 at 2.0 A g−1 after 1000 cycles, as well as a high rate capability due to the dominated surface-capacitive contribution. Furthermore, the combination of in-situ and ex-situ powder X-ray diffraction patterns unequivocally reveals a conversion-alloy mechanism in STS anode upon lithiation/delithiation. © 2021 Elsevier B.V.

关键词： Graphene

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Microcavity exciton polaritons at room temperature

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Photonics Insights 2022年第1期1卷 60-103页

作者： Sanjib Ghosh Rui Su Jiaxin Zhao Antonio Fieramosca Jinqi Wu Tengfei Li Qing Zhang Feng Li Zhanghai Chen Timothy Liew Daniele Sanvitto Qihua Xiong Beijing Academy of Quantum Information Sciences BeijingChina Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingaporeSingapore School of Materials Science and Engineering Peking UniversityBeijingChina Research Center for Wide Gap Semiconductor Peking UniversityBeijingChina Key Laboratory for Physical Electronics and Devices of the Ministry of Education&Shaanxi Key Laboratory of Information Photonic Technique School of Electronic Science and EngineeringFaculty of Electronic and Information EngineeringXi’an Jiaotong UniversityXi’anChina Department of Physics College of Physical Science and TechnologyXiamen UniversityXiamenChina CNR NANOTEC Campus EcotekneLecceItaly State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijingChina Frontier Science Center for Quantum Information BeijingChina Beijing Innovation Center for Future Chips Tsinghua UniversityBeijingChina

The quest for realizing novel fundamental physical effects and practical applications in ambient conditions has led to tremendous interest in microcavity exciton polaritons working in the strong coupling regime at room *** the past few decades,a wide range of novel semiconductor systems supporting robust exciton polaritons have emerged,which has led to the realization of various fascinating phenomena and practical *** paper aims to review recent theoretical and experimental developments of exciton polaritons operating at room temperature,and includes a comprehensive theoretical background,descriptions of intriguing phenomena observed in various physical systems,as well as accounts of optoelectronic ***,an in-depth review of physical systems achieving room temperature exciton polaritons will be presented,including the early development of ZnO and GaN microcavities and other emerging systems such as organics,halide perovskite semiconductors,carbon nanotubes,and transition metal ***,a perspective of outlooking future developments will be elaborated.

关键词： microcavity exciton polariton Bose-Einstein condensation exciton binding energy quantum simulation nonequilibrium dynamics

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575-fs passively mode-locked Yb:CaF2 ceramic laser

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Chinese Physics B 2020年第7期29卷 326-330页

作者： Cong Wang Qian-Qian Hao Wei-Wei Li Hai-Jun Huang Shao-Zhao Wang Da-Peng Jiang Jie Liu Bing-Chu Mei Liang-Bi Su Shandong Provincial Engineering and Technical Center of Light Manipulations&Shandong Provincial Key Laboratory of Optics and Photonic Device School of Physics and ElectronicsShandong Normal UniversityJinan 250358China Collaborative Innovation Center of Light Manipulations and Applications Shandong Normal UniversityJinan 250358China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Science Wuhan University of TechnologyWuhan 430070China Synthetic Single Crystal Research Center Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201800China Key Laboratory of Transparent and Opto-functional Inorganic Materials Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201800China

A Yb-doped CaF2 transparent ceramics was successfully fabricated by the hot-pressed method and its laser characteristics were studied.A broad tuning performance and mode-locked laser operation were demonstrated in this ceramics for the first time,to our best knowledge.A 60-nm continuous-wavelength tunable laser from 1019 nm to 1079 nm was obtained with a birefringent *** employing a semiconductor saturable absorber mirror without additional dispersion compensation elements,a continuous-wave mode-locked laser with pulse duration as short as 575 fs was delivered,at a central wavelength of 1048.5 *** oscillator is operated under a repetition rate of 55 *** results indicate that the Yb:CaF2 transparent ceramics is an ideal candidate for the development of ultrafast lasers in the near-infrared regime.

关键词： mode-locking tunable transparent ceramics solid-state lasers

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Efficiency enhancement in photoelectrochemical water splitting: Defect passivation and boosted charge transfer kinetics of zinc oxide nanostructures via chalcopyrite/chalcogenide mix sensitization

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Physical Review materials 2021年第12期5卷 125403-125403页

作者： Cigdem Tuc Altaf Nazrin Abdullayeva Ozlem Coskun Alihan Kumtepe İpek Deniz Yildirim Emre Erdem Maochang Liu Ali Bozbey Ertan Agar Mehmet Sankir Nurdan Demirci Sankir Micro and Nanotechnology Graduate Program TOBB University of Economics and Technology Sogutozu Caddesi No 43 Sogutozu 06560 Ankara Turkey Faculty of Engineering and Natural Sciences Sabanci University Orhanli Tuzla 34956 Istanbul Turkey International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 People's Republic of China Department of Electrical and Electronics Engineering TOBB University of Economics and Technology Sogutozu Caddesi No 43 Sogutozu 06560 Ankara Turkey Department of Mechanical Engineering Energy Engineering Graduate Program University of Massachusetts Lowell Lowell Massachusetts 01854 USA Department of Materials Science and Nanotechnology Engineering TOBB University of Economics and Technology Sogutozu Caddesi No 43 Sogutozu 06560 Ankara Turkey

ZnO thin films in nanorod (NR) and nanoflower (NF) morphologies were used as photoelectrode scaffolds for efficient visible-light-driven photoelectrochemical (PEC) water splitting process, where their decoration with copper indium gallium sulfide (CIGS) and indium sulfide (In2S3) layers resulted in significant PEC performance enhancement. ZnO NF/CIGS/In2S3 photoelectrodes exhibited a remarkably high PEC efficiency (∼6.0% applied bias photon-to-current efficiency, 83% incident photon-to-current efficiency) due to the negligible dark current, while ZnO NR/CIGS/In2S3 generated a photocurrent density of ***–2 at 0.4 V (vs Ag/AgCl), being one of the highest performances reported in the literature for copper-based chalcopyrite photoelectrodes so far. The interfacial photoelectrode-electrolyte charge transport dynamics, investigated via intensity-modulated photocurrent spectroscopy, exhibited a sevenfold increase in charge transfer efficiencies with a significant drop in surface recombination kinetics for ZnO NF after CIGS/In2S3 decoration. The obtained results show consistency with numerically modeled electric field distribution profiles and electron paramagnetic resonance results of ZnO NF, rationalizing the enhanced charge transfer rates for decorated samples and confirming the defect passivating nature of CIGS/In2S3.

关键词： Electrochemical properties Photoconductivity

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Evidence of topological nodal lines and surface states in the centrosymmetric superconductor SnTaS2

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Physical Review B 2021年第3期103卷 035133-035133页

作者： Wenqing Chen Lulu Liu Wentao Yang Dong Chen Zhengtai Liu Yaobo Huang Tong Zhang Haijun Zhang Zhonghao Liu D. W. Shen State Key Laboratory of Functional Materials for Informatics and Center for Excellence in Superconducting Electronics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences Beijing 100049 China National Laboratory of Solid State Microstructures School of Physics Nanjing University Nanjing 210093 China State Key Laboratory of Surface Physics Department of Physics and Advanced Materials Laboratory Fudan University Shanghai 200438 China College of Physics Qingdao University Qingdao 266071 China Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201204 China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China

The discovery of signatures of topological superconductivity in superconducting bulk materials with topological surface states has attracted intensive research interest recently. Utilizing angle-resolved photoemission spectroscopy and first-principles calculations, here, we demonstrate the existence of topological nodal-line states and drumheadlike surface states in centrosymmetric superconductor SnTaS2, which is a type-II superconductor with a critical transition temperature of about 3 K. The valence bands from Ta 5d orbitals and the conduction bands from Sn 5p orbitals cross each other, forming two nodal lines in the vicinity of the Fermi energy without the inclusion of spin-orbit coupling (SOC), protected by the spatial-inversion symmetry and time-reversal symmetry. The nodal lines are gapped out by SOC. The drumheadlike surface states, the typical characteristics in nodal-line semimetals, are quite visible near the Fermi level. Our findings indicate that SnTaS2 offers a promising platform for exploring the exotic properties of the topological nodal-line fermions and helps in the study of topological superconductivity.

关键词： Electronic structure Topological materials Node-line semimetals Angle-resolved photoemission spectroscopy Density functional theory

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Large-scale quantum-dot-lithium-niobate hybrid integrated photonic circuits enabling on-chip quantum networking

arXiv

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arXiv 2025年

作者： Wang, Xudong Zhang, Xiuqi Chen, Bowen Zhu, Yifan Qin, Yuanhao Dong, Lvbin Cai, Jiachen Sui, Dongchen Wu, Jinbo Zhang, Quan Liu, Runze Huo, Yongheng Liu, Jin Ou, Xin Zhang, Jiaxiang State Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences 865 Changning Road Shanghai200050 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China Department of Physics The Chinese University of Hong Kong Hong Kong Hefei National Research Center for Physical Sciences Microscale and School of Physical Sciences University of Science and Technology of China Hefei230026 China Shanghai Research Center for Quantum Science CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China Shanghai201315 China State Key Laboratory of Optoelectronic Materials and Technologies School of Physics School of Electronics and Information Technology Sun Yat-sen University Guangzhou510275 China

Hybrid integrated quantum photonics provides a promising approach to combine solid-state artificial atoms with fast reconfigurable photonic circuits, enabling scalable, chip-based quantum networks with enhanced qubit numbers and improved sources connectivity. Self-assembled quantum dots (QDs) are particularly attractive for this long-sought goal due to their ability to generate highly indistinguishable single photons with exceptional brightness and efficiency. The large-scale integration of QDs into low-loss photonic circuits could facilitate the creation of complex photonic quantum networks, enabling the generation, control, and transfer of entangled states via two-photon interference across distributed nodes. However, challenges related to the limited scalability in integration and significant inhomogeneous spectral broadening of QD emissions, and realization of quantum interference among independent sources have hindered progress toward this goal. Here, we present a hybrid photonic architecture that integrates arrays of QD-containing waveguides with low-loss lithium niobate (LN) photonic circuits, incorporating 20 deterministic single-photon sources (SPSs). By leveraging the piezoelectric properties of thin-film lithium niobate (TFLN), we introduce a circuit-compatible strain-tuning technique, achieving on-chip local spectral tuning of individual QD emissions by up to 7.7 meV—three orders of magnitude greater than the transform-limited linewidth of QD single-photon emission. This approach allows for the demonstration of on-chip quantum interference, achieving a visibility of 0.73 between two spatially separated waveguide-coupled QD SPSs which are connected through 0.48 mm-long waveguides, thereby establishing a functional quantum network on the hybrid platform. The large-scale integration of spectrally tunable and quantum-interconnected QD-based SPSs into low-loss LN photonic circuits, combined with the potential for fast electro-optical switching, paves the way

关键词： Semiconductor quantum dots

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Observations of cosmic-ray Sun’s shadow with LHAASO-WCDA 38

Observations of cosmic-ray Sun’s shadow with LHAASO-WCDA

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38th International Cosmic Ray Conference, ICRC 2023

作者： Cui, Ming-Yang Xia, Jie He, Jia-Yin Shi, Guang-Lu Feng, Li Yuan, Qiang Zhang, Yi Cao, Zhen Aharonian, F. An, Q. Axikegu Bai, Y.X. Bao, Y.W. Bastieri, D. Bi, X.J. Bi, Y.J. Cai, J.T. Cao, Q. Cao, W.Y. Cao, Zhe Chang, J. Chang, J.F. Chen, A.M. Chen, E.S. Chen, Liang Chen, Lin Chen, Long Chen, M.J. Chen, M.L. Chen, Q.H. Chen, S.H. Chen, S.Z. Chen, T.L. Chen, Y. Cheng, N. Cheng, Y.D. Cui, M.Y. Cui, S.W. Cui, X.H. Cui, Y.D. Dai, B.Z. Dai, H.L. Dai, Z.G. Danzengluobu della Volpe, D. Dong, X.Q. Duan, K.K. Fan, J.H. Fan, Y.Z. Fang, J. Fang, K. Feng, C.F. Feng, L. Feng, S.H. Feng, X.T. Feng, Y.L. Gabici, S. Gao, B. Gao, C.D. Gao, L.Q. Gao, Q. Gao, W. Gao, W.K. Ge, M.M. Geng, L.S. Giacinti, G. Gong, G.H. Gou, Q.B. Gu, M.H. Guo, F.L. Guo, X.L. Guo, Y.Q. Guo, Y.Y. Han, Y.A. He, H.H. He, H.N. He, J.Y. He, X.B. He, Y. Heller, M. Hor, Y.K. Hou, B.W. Hou, C. Hou, X. Hu, H.B. Hu, Q. Hu, S.C. Huang, D.H. Huang, T.Q. Huang, W.J. Huang, X.T. Huang, X.Y. Huang, Y. Huang, Z.C. Ji, X.L. Jia, H.Y. Jia, K. Jiang, K. Jiang, X.W. Jiang, Z.J. Jin, M. Kang, M.M. Ke, T. Kuleshov, D. Kurinov, K. Li, B.B. Li, Cheng Li, Cong Li, D. Li, F. Li, H.B. Li, H.C. Li, H.Y. Li, J. Li, Jian Li, Jie Li, K. Li, W.L. Li, W.L. Li, X.R. Li, Xin Li, Y.Z. Li, Zhe Li, Zhuo Liang, E.W. Liang, Y.F. Lin, S.J. Liu, B. Liu, C. Liu, D. Liu, H. Liu, H.D. Liu, J. Liu, J.L. Liu, J.Y. Liu, M.Y. Liu, R.Y. Liu, S.M. Liu, W. Liu, Y. Liu, Y.N. Lu, R. Luo, Q. Lv, H.K. Ma, B.Q. Ma, L.L. Ma, X.H. Mao, J.R. Min, Z. Mitthumsiri, W. Mu, H.J. Nan, Y.C. Neronov, A. Ou, Z.W. Pang, B.Y. Pattarakijwanich, P. Pei, Z.Y. Qi, M.Y. Qi, Y.Q. Qiao, B.Q. Qin, J.J. Ruffolo, D. Sáiz, A. Semikoz, D. Shao, C.Y. Shao, L. Shchegolev, O. Sheng, X.D. Shu, F.W. Song, H.C. Key Laboratory of Dark Matter and Space Astronomy Purple Mountain Observatory Chinese Academy of Sciences Nanjing210023 China School of Astronomy and Space Science University of Science and Technology of China Hefei230026 China Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China University of Chinese Academy of Sciences Beijing100049 China TIANFU Cosmic Ray Research Center Sichuan Chengdu China Dublin Institute for Advanced Studies 31 Fitzwilliam Place Dublin 2 Ireland Max-Planck-Institut for Nuclear Physics P.O. Box 103980 Heidelberg69029 Germany State Key Laboratory of Particle Detection and Electronics China University of Science and Technology of China Anhui Hefei230026 China School of Physical Science and Technology School of Information Science and Technology Southwest Jiaotong University Sichuan Chengdu610031 China School of Astronomy and Space Science Nanjing University Jiangsu Nanjing210023 China Center for Astrophysics Guangzhou University Guangdong Guangzhou510006 China Hebei Normal University Hebei Shijiazhuang050024 China Key Laboratory of Dark Matter and Space Astronomy Key Laboratory of Radio Astronomy Purple Mountain Observatory Chinese Academy of Sciences Jiangsu Nanjing210023 China Tsung-Dao Lee Institute School of Physics and Astronomy Shanghai Jiao Tong University Shanghai200240 China Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai200030 China Key Laboratory of Cosmic Rays [Tibet University Ministry of Education Tibet Lhasa850000 China National Astronomical Observatories Chinese Academy of Sciences Beijing100101 China School of Physics and Astronomy Sun Yat-sen University Zhuhai519000 China School of Physics Guangdong Guangzhou510275 China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen Unive

During the propagation of cosmic rays (CRs) in the solar system, they are blocked by the Sun and deflected by the magnetic field, resulting in a shadow on the celestial map. As CRs travel from the vicinity of the Sun to the Earth, they encounter deflection from the coronal magnetic field (CMF), the interplanetary magnetic field (IMF), and finally the geomagnetic field (GMF). The extent of deflection is determined by the magnetic field’s intensity, direction, and energy of the CRs. Variations in the magnetic field cause corresponding changes in the position and size of the Sun’s shadow. By observing the Sun’s shadow of CRs, we can investigate the magnetic fields between the Sun and the Earth, complementing other measurements on these magnetic fields. Furthermore, it serves as a means to validate magnetic field models. The Large High Altitude Air Shower Observatory (LHAASO) is a new generation cosmic-ray and gamma-ray experiment in Daocheng, western China. With a vast Water Cherenkov Detector Array (WCDA) spanning 78,000 m2, LHAASO can successfully observe the significant Sun’s shadow within just a few days. Our study uses the WCDA to measure the Sun’s shadow effect caused by CRs over multiple Carrington rotation periods. Subsequently, we compare these results with simulations based on different magnetic field models. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmic rays

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