Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment最新文献

{"title":"Characterization of 4H-SiC Low Gain Avalanche Detectors (LGADs)","authors":"Tao Yang ,&nbsp;Ben Sekely ,&nbsp;Yashas Satapathy ,&nbsp;Greg Allion ,&nbsp;Philip Barletta ,&nbsp;Carl Haber ,&nbsp;Steve Holland ,&nbsp;John F. Muth ,&nbsp;Spyridon Pavlidis ,&nbsp;Stefania Stucci","doi":"10.1016/j.nima.2025.170873","DOIUrl":"10.1016/j.nima.2025.170873","url":null,"abstract":"<div><div>4H-SiC Low Gain Avalanche Detectors (LGADs) have been fabricated and characterized. The devices employ a circular mesa design with low-resistivity contacts and an SiO₂ passivation layer. The I–V and C–V characteristics of the 4H-SiC LGADs are compared with complementary 4H-SiC PiN diodes to confirm a high breakdown voltage and low leakage current. Both LGADs and PiN diodes were irradiated with <span><math><mi>α</mi></math></span> particles from a <span><math><mrow><msubsup><mrow></mrow><mrow><mn>84</mn></mrow><mrow><mn>210</mn></mrow></msubsup><mi>Po</mi></mrow></math></span> source. The charge collected by each device was compared, and it was observed that low-gain charge carrier multiplication is achieved in the 4H-SiC LGAD.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 170873"},"PeriodicalIF":1.4,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144863375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Digital electronics upgrade of the INDRA 4π charged particle detection array and resulting performance improvements","authors":"J.D. Frankland ,&nbsp;N. Le Neindre ,&nbsp;M. Henri ,&nbsp;C. Gouyet ,&nbsp;R. Revenko ,&nbsp;Q. Fable ,&nbsp;D. Gruyer ,&nbsp;R. Bougault ,&nbsp;A. Chbihi ,&nbsp;T. Genard ,&nbsp;J. Lemarié ,&nbsp;O. Lopez ,&nbsp;Q. Beaudouin ,&nbsp;B. Borderie ,&nbsp;P. Bourgault ,&nbsp;C. Ciampi ,&nbsp;I. Dekhissi ,&nbsp;V. Godefroid ,&nbsp;M. La Commara ,&nbsp;L. Leterrier ,&nbsp;G. Verde","doi":"10.1016/j.nima.2025.170908","DOIUrl":"10.1016/j.nima.2025.170908","url":null,"abstract":"<div><div>INDRA is a <span><math><mrow><mn>4</mn><mi>π</mi></mrow></math></span> charged particle detection array in use since 1993 for the study of nuclear collisions at bombarding energies from a few 10s to a few 100s of MeV/nucleon. Originally equipped with custom electronics using the VXI standard, the entire acquisition system was recently upgraded to a fully digital system using commercially-available modules supplied by mesytec GmbH &amp; Co. KG. At the same time, both low and high voltage supplies and all cabling and signal routing outside of the reaction chamber have also been replaced. The new electronics were used for the first time in 2022 in an experiment at GANIL coupling INDRA with 12 blocks of FAZIA telescopes placed at forward angles. The full details of the upgraded system, and the resulting improvements in performance, stability, dead time and identification capabilities are presented in this article.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 170908"},"PeriodicalIF":1.4,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bunch-by-bunch BPM data analysis at HEPS","authors":"Jun He ,&nbsp;Yanfeng Sui ,&nbsp;Fangqi Huang ,&nbsp;Wan Zhang ,&nbsp;Daheng Ji ,&nbsp;Zhe Duan ,&nbsp;Yongbin Leng ,&nbsp;Taoguang Xu ,&nbsp;Junhui Yue ,&nbsp;Jianshe Cao","doi":"10.1016/j.nima.2025.170923","DOIUrl":"10.1016/j.nima.2025.170923","url":null,"abstract":"<div><div>An important diagnostic method for beam dynamics characterization in synchrotron radiation light sources is presented. By directly sampling beam position monitor (BPM) signals using an adequate performing oscilloscope, the transverse beam position and longitudinal phases (arrival times) of individual bunches could be resolved with unprecedented precision. A novel technique for extracting longitudinal phase information from oscilloscope data is detailed, achieving a resolution of 0.1 ps. Triggered by the injection timing signal, the oscilloscope captures transient dynamics during beam injection, enabling the derivation of critical parameters such as the longitudinal tune and residual oscillation amplitude, which are essential for optimizing the injection efficiency. The singular-value decomposition (SVD) method was applied on the acquired bunch-by-bunch transverse and longitudinal data, revealing the dominant physical modes (e.g., betatron and synchrotron oscillations) through their associated singular values. Furthermore, the SVD-based approach demonstrates the potential for identifying coupled-bunch instabilities by isolating collective beam motion components. This work establishes a versatile framework for advanced beam diagnostics, combining high temporal resolution, multi-dimensional parameter extraction, and instability analysis, thereby providing critical insights for accelerator performance optimization.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 170923"},"PeriodicalIF":1.4,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144830529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Asymmetric errors","authors":"Roger Barlow ,&nbsp;Alessandra Rosalba Brazzale ,&nbsp;Igor Volobouev","doi":"10.1016/j.nima.2025.170857","DOIUrl":"10.1016/j.nima.2025.170857","url":null,"abstract":"<div><div>We present a procedure for handling asymmetric errors. Many results in particle physics are presented as values with different positive and negative errors, and there is no consistent procedure for handling them. We consider the difference between errors quoted, using pdfs and using likelihoods, and the difference between the rms spread of a measurement and the 68% central confidence region. We provide a comprehensive analysis of the possibilities, and software tools to enable their use.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 170857"},"PeriodicalIF":1.4,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144880163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radiation effects of CERN-PS 24 GeV/c protons in silicon strip sensors, evaluated with ATLAS18 ITk strip sensor test structures","authors":"I. Mandić ,&nbsp;V. Cindro ,&nbsp;M. Mikuž ,&nbsp;B. Novak ,&nbsp;P. Federičová ,&nbsp;R. Jirásek ,&nbsp;J. Kroll ,&nbsp;J. Kvasnička ,&nbsp;M. Mikeštíková ,&nbsp;P. Tůma ,&nbsp;V. Fadeyev ,&nbsp;Y. Unno ,&nbsp;E. Bach ,&nbsp;C. Fleta ,&nbsp;M. Ullan ,&nbsp;U. Soldevila ,&nbsp;R.S. Orr ,&nbsp;C.K. Mahajan ,&nbsp;S.K. Sridhar ,&nbsp;A.S. Chisholm ,&nbsp;I. Dawson","doi":"10.1016/j.nima.2025.170917","DOIUrl":"10.1016/j.nima.2025.170917","url":null,"abstract":"<div><div>Test structures from the ATLAS18 ITk strip detector wafers were irradiated with 24 GeV/c protons. These test structures were positioned at various angles with respect to the proton beam. Blocks of G10 material were placed in front of these test structures to study the effect of scattering of primary protons on the received particle fluence. The results confirm that both the incidence angle of the beam and scattering significantly influence the actual fluence to which the samples are exposed. Miniature strip detectors, first irradiated with protons, were also irradiated with reactor neutrons, to a combined fluence of <span><math><mrow><msub><mrow><mi>Φ</mi></mrow><mrow><mi>n</mi><mi>e</mi><mi>q</mi></mrow></msub><mo>=</mo><mn>1</mn><mo>.</mo><mn>6</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>15</mn></mrow></msup></mrow></math></span> cm⁻². The combination of proton and neutron fluences matched the combination expected in the most exposed part of the strip detector in the ALTAS Inner Tracker (ITk). Good charge collection was measured confirming that the strip detectors are sufficiently radiation hard for successful operation to highest fluences expected at the HL-LHC.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 170917"},"PeriodicalIF":1.4,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144852423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A monolithic antineutrino detector for non-intrusive reactor monitoring","authors":"Steven A. Dazeley ,&nbsp;Oluwatomi A. Akindele ,&nbsp;Marc Bergevin ,&nbsp;Adam Bernstein ,&nbsp;Peter C. Haugen ,&nbsp;Viacheslav A. Li ,&nbsp;Anthony F. Papatyi","doi":"10.1016/j.nima.2025.170915","DOIUrl":"10.1016/j.nima.2025.170915","url":null,"abstract":"<div><div>Recent advances in organic detection media have found applications in reactor antineutrino physics. One example is the Precision Oscillation and Spectrum Experiment (PROSPECT), which leveraged pulse-shape sensitivity to enable a successful surface deployment at the High Flux Isotope Reactor (HFIR), achieving a signal to background of 4:1. PROSPECT utilized almost 4 tonnes of ⁶Li-doped pulse-shape sensitive liquid scintillator in a two-dimensional segmented array. It used a combination of pulse-shape sensitivity and position sensitivity via segmentation to reduce the most prominent form of correlated background for surface detectors — cosmogenic fast neutrons. These new liquids may enable detector designs that bring additional tools for reducing backgrounds while reducing engineering complexity. In this paper, we present an investigation into a detector design that exploits properties of these liquids by maximizing spectral and pulse-shape sensitivity via highly efficient photon detection. The detector utilizes photomultiplier tubes (PMTs) placed at the top and bottom of a right cylinder, with highly reflective white walls. This design sacrifices some position sensitivity for maximal photon efficiency. The design choice has consequences for the identification of the background and antineutrino sensitivity, which we examine.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 170915"},"PeriodicalIF":1.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144830531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of trace amounts of water on the stability of Micro-Pattern Gaseous Detectors measured in Ar-CO2 (90-10)","authors":"H. Fribert ,&nbsp;L. Fabbietti ,&nbsp;P. Gasik ,&nbsp;B. Ulukutlu","doi":"10.1016/j.nima.2025.170912","DOIUrl":"10.1016/j.nima.2025.170912","url":null,"abstract":"<div><div>In this study, we investigate the influence of humidity on the performance of various non-resistive Micro Pattern Gaseous Detectors, such as GEM, Thick-GEM, and Micromegas, operated with Ar-CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> (90-10) gas mixture. The water content is introduced in a range of 0–5000<!--> <!-->ppm˙V. It is observed that the presence of increased humidity does not significantly degrade any of the studied performance criteria. On the contrary, our measurements suggest an improvement in discharge stability with increasing humidity levels at the highest gains and fields. No significant difference is observed at the lower gains, indicating that humidity helps to reduce the rate of spurious discharges related to electrode defects or charging-up of the insulating layers. We conclude that adding a small amount of water to the gas mixture may be beneficial for the stable operation of an MPGD.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 170912"},"PeriodicalIF":1.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144830530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The SiPM readout plane for the ePIC-dRICH detector at the EIC: Overview and beam test results","authors":"N. Rubini ,&nbsp;B.R. Achari ,&nbsp;N. Agrawal ,&nbsp;M. Alexeev ,&nbsp;C. Alice ,&nbsp;P. Antonioli ,&nbsp;C. Baldanza ,&nbsp;L. Barion ,&nbsp;A. Calivà ,&nbsp;M. Capua ,&nbsp;M. Chiosso ,&nbsp;M. Contalbrigo ,&nbsp;F. Cossio ,&nbsp;M. Da Rocha Rolo ,&nbsp;A. De Caro ,&nbsp;D. De Gruttola ,&nbsp;G. Dellacasa ,&nbsp;D. Falchieri ,&nbsp;S. Fazio ,&nbsp;N. Funicello ,&nbsp;R. Wheadon","doi":"10.1016/j.nima.2025.170890","DOIUrl":"10.1016/j.nima.2025.170890","url":null,"abstract":"<div><div>The dual-radiator RICH detector of the ePIC experiment at the future Electron-Ion Collider will make use of SiPM sensors for the detection of Cherenkov light. The photodetector will cover <span><math><mo>≈</mo></math></span>3<!--> <!-->m² with 3 <span><math><mo>×</mo></math></span> 3<!--> <!-->mm² pixels, for a total of more than 300k readout channels and will be the first application of SiPMs for single-photon detection in a HEP experiment. SiPMs are chosen for their low cost and high efficiency in magnetic fields (<span><math><mo>≈</mo></math></span>1<!--> <!-->T at the dRICH location). However, since they are not radiation hard, careful testing and attention are required to preserve single-photon counting capabilities and maintain dark count rates (DCR) under control over the years of running of the ePIC experiment. We present an overview of the ePIC-dRICH detector system and the current status of the R&amp;D performed for the operation of the SiPM optical readout subsystem. Special attention will be paid to the recent results of the beam test of a prototype SiPM readout plane with a large area consisting of a total of up to 2048 3 <span><math><mo>×</mo></math></span> 3<!--> <!-->mm² sensors. The prototype photodetector is modular and based on a new EIC-driven photodetection unit (PDU) developed by INFN, which integrates 256 SiPM pixel sensors, cooling and Time to Digital Converter (TDC) electronics in a volume of <span><math><mo>≈</mo></math></span>5 × 5 <span><math><mo>×</mo></math></span> 14<!--> <!-->cm³. Several PDU modules were built and successfully tested with particle beams at CERN-PS in October 2023 and May 2024. The data were collected with a complete chain of front-end and readout electronics based on the ALCOR chip, developed by INFN Torino.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 170890"},"PeriodicalIF":1.4,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144863329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating tagged neutron inspection with explainable AI for threat material identification","authors":"Hadi Shahabinejad ,&nbsp;Davorin Sudac ,&nbsp;Karlo Nad ,&nbsp;Isabelle Espagnon ,&nbsp;Clotilde de Sainte Foy ,&nbsp;Bertrand Perot ,&nbsp;Cedric Carasco ,&nbsp;Alix Sardet ,&nbsp;Edwin Friedmann ,&nbsp;Jean Philippe Poli ,&nbsp;Jessica Delgado ,&nbsp;Felix Pino ,&nbsp;Sandra Moretto ,&nbsp;Christine Mer ,&nbsp;Guillaume Sannie ,&nbsp;Jasmina Obhodas","doi":"10.1016/j.nima.2025.170921","DOIUrl":"10.1016/j.nima.2025.170921","url":null,"abstract":"<div><div>Here we present an innovative approach for detecting threat materials within a sealed container by integrating tagged fast neutron activation analysis with Explainable Artificial Intelligence (XAI). Two AI models, a Feed-Forward Neural Network (FFNN) and a Convolutional Neural Network (CNN), were developed to analyze the emitted gamma rays to identify materials like explosives and drugs based on depth profiles of carbon, nitrogen, and oxygen concentrations. XAI was applied to make the models' decision-making process transparent. The method is adaptable to various spectrometric analyses. We demonstrate its effectiveness using data obtained by the Rapidly Relocatable Tagged Neutron Inspection System (RRTNIS), which is a complementary sensor to X-ray radiography for inspecting cargo containers, despite challenges such as variable material placement, background noise, and shielding effects. Our approach successfully locates and categorizes threat materials, both alone and within surrounding materials, at various locations within sealed cargo containers.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1081 ","pages":"Article 170921"},"PeriodicalIF":1.4,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of the CiADS timing and fast protection system","authors":"Hai Zheng ,&nbsp;Yidan Zheng ,&nbsp;Gongfa Liu ,&nbsp;Yuan He","doi":"10.1016/j.nima.2025.170907","DOIUrl":"10.1016/j.nima.2025.170907","url":null,"abstract":"<div><div>The China Initiative Accelerator Driven System (CiADS), currently under construction in Huizhou, represents the world’s first megawatt-scale Accelerator-Driven System (ADS) facility, designed to address the critical challenge of nuclear waste management through the transmutation of long-lived radioactive isotopes. The CiADS features a <span><math><mrow><mn>1</mn><mo>.</mo><mn>5</mn><mspace></mspace><mtext>GeV</mtext></mrow></math></span> superconducting radiofrequency (SRF) linear accelerator (LINAC) that must deliver proton beams to five distinct terminals, including a <span><math><mrow><mn>7</mn><mo>.</mo><mn>5</mn><mspace></mspace><mtext>MW</mtext></mrow></math></span> fast reactor and isotope production targets, via dynamic time-sharing. This operational requirement requires a highly reliable timing and fast protection system capable of achieving efficient acceleration of the beam energy and ensuring a machine protection latency of less than <span><math><mrow><mn>10</mn><mspace></mspace><mi>μ</mi><mtext>s</mtext></mrow></math></span>. This paper presents the design of the CiADS Timing and Fast Protection System, highlighting its innovative architecture to overcome the limitations of conventional accelerator timing systems. Drawing on advancements in White Rabbit network technology and machine protection system design, the proposed system integrates sub-nanosecond time synchronization, deterministic network reliability, and automated beam recovery mechanisms. The design leverages insights from global projects such as FAIR, HIAF, and SHINE, as well as theoretical and practical studies on White Rabbit networks, to ensure the safe and efficient operation of the CiADS facility. This work underscores the critical role of advanced timing and protection systems in enabling the next generation of high-power proton accelerators for sustainable nuclear energy development.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 170907"},"PeriodicalIF":1.4,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}