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

{"title":"Crystal assisted steering of muons and antimuons at the muon collider","authors":"I.V. Kyryllin ,&nbsp;M. Romagnoni ,&nbsp;N. Canale ,&nbsp;P. Fedeli ,&nbsp;V. Guidi ,&nbsp;L. Malagutti ,&nbsp;A. Mazzolari ,&nbsp;R. Negrello ,&nbsp;G. Paternò ,&nbsp;A. Sytov ,&nbsp;L. Bandiera","doi":"10.1016/j.nima.2025.170385","DOIUrl":"10.1016/j.nima.2025.170385","url":null,"abstract":"<div><div>The muon collider is a proposed accelerator designed to push the boundaries of particle physics, aiming to investigate fundamental interaction at an unprecedented energy range. Operating with both positive and negative particles at the TeV scale, this ambitious machine presents unique challenges in beam control. Bent crystals offer a promising solution for steering high-energy particle beams in such accelerators. This study explores the potential of bent crystals for deflecting muons and antimuons, focusing on their use for beam extraction and collimation at the Muon Collider. A series of simulations were conducted to assess the efficiency of two deflection mechanisms: planar channeling and axial stochastic deflection, at the 1.5 TeV energy stage of the proposed collider. The study addresses the challenges of steering negatively charged particles via coherent interactions in the crystal, providing valuable insights into the most effective beam manipulation techniques at this energy scale.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170385"},"PeriodicalIF":1.5,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Large area curved silicon modules for future trackers","authors":"S. Moss ,&nbsp;Z. Zhang ,&nbsp;A.J. Bevan ,&nbsp;M. Bullough ,&nbsp;J. Dopke ,&nbsp;J. Mistry ,&nbsp;S. Zenz","doi":"10.1016/j.nima.2025.170388","DOIUrl":"10.1016/j.nima.2025.170388","url":null,"abstract":"<div><div>For many years there has been an aspiration within the community to develop curved silicon detectors for particle physics applications. We present the results from 10 × 10cm low mass support modules as a part of the “ZeroMass” project that aims to minimise the material budget for tracking and vertexing systems for future colliders. We use <span><math><mrow><mn>50</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> thick DC coupled strip sensors from Micron Semiconductor Ltd., with a carbon composite support frame. Our current module demonstrators use a radius of curvature of 15 cm, typical of that used for the outer parts of large pixel systems, or the inner part of strip trackers and the outer part of large radii vertex detectors. The material budget obtained varies from an <span><math><msub><mrow><mi>X</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> of 0.05% in the active area to 0.62% in the support structure, with an average of 0.28%. There is further scope for material budget reduction in applying the concept and methods to large instruments for future detector systems, which we also discuss.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170388"},"PeriodicalIF":1.5,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593988","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":"Machine learning approach to CMS RPC HV scan data analysis","authors":"M. Pehlivanova ,&nbsp;M. Tytgat ,&nbsp;K. Mota Amarilo ,&nbsp;A. Samalan ,&nbsp;K. Skovpen ,&nbsp;G.A. Alves ,&nbsp;E. Alves Coelho ,&nbsp;F. Marujo da Silva ,&nbsp;M. Barroso Ferreira Filho ,&nbsp;E.M. Da Costa ,&nbsp;D. De Jesus Damiao ,&nbsp;S. Fonseca De Souza ,&nbsp;R. Gomes De Souza ,&nbsp;L. Mundim ,&nbsp;H. Nogima ,&nbsp;J.P. Pinheiro ,&nbsp;A. Santoro ,&nbsp;M. Thiel ,&nbsp;A. Aleksandrov ,&nbsp;R. Hadjiiska ,&nbsp;F. Fienga","doi":"10.1016/j.nima.2025.170367","DOIUrl":"10.1016/j.nima.2025.170367","url":null,"abstract":"<div><div>Resistive Plate Chambers (RPC) are gaseous detectors in the muon system of the Compact Muon Solenoid (CMS) experiment at the European Laboratory for Particle Physics, CERN. The RPC high-voltage scan is a crucial sequence of calibration runs typically conducted at the onset of each data-taking year with the initial collisions of the CERN Large Hadron Collider (LHC) at nominal luminosity in proton–proton collisions <span><math><mrow><mn>2</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>34</mn></mrow></msup><mspace></mspace><msup><mrow><mi>cm</mi></mrow><mrow><mo>−</mo><mn>2</mn></mrow></msup><msup><mrow><mi>s</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span>, ensuring RPC proper functioning by establishing correct working points. This study applies machine learning algorithms to automate and accelerate previously manual, time-consuming analysis, enhancing efficiency and decision-making. We developed an autoencoder artificial neural network (ANN) in Fourier space (FSAC) to approximate efficiency curves, which are then used to determine working points. This new approach reduces the time for data analysis from over three months to less than a week.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170367"},"PeriodicalIF":1.5,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594006","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 general track fit based on triplets","authors":"A. Schöning","doi":"10.1016/j.nima.2025.170391","DOIUrl":"10.1016/j.nima.2025.170391","url":null,"abstract":"<div><div>This paper presents a general three-dimensional track fit based on hit triplets. The general track fit considers spatial hit and multiple Coulomb scattering uncertainties, and can also be extended to include energy losses. Input to the fit are detector-specific triplet parameters, which contain information about the triplet geometry (hit positions), the radiation length of the material and the magnetic field. Since the solution is given by an analytical closed-form, it is possible to use the same fitting code for all kind of tracking detectors.</div><div>Fitting formulas are given for the global track fit as well as for the local hit triplets. The latter allows filtering out triplets with poor fit quality at an early stage of track reconstruction. The construction and fit of local triplets is fully parallelizable, enabling accelerated computation with parallel hardware architectures. Formulas for the detector-specific triplet parameters are derived for the two most commonly used field configurations for tracking detectors, namely a uniform solenoidal field and gap spectrometer dipole. An algorithm to calculate the triplet parameters for an arbitrary magnetic field configuration is presented too.</div><div>This paper also includes a discussion of inherent track fit biases. Furthermore, a new method is proposed to accelerate track fitting by classifying tracking regimes and using optimal fit formulas.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170391"},"PeriodicalIF":1.5,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Canonical electrodynamics and continuous symmetries in discrete reductions","authors":"Adam J. Higuet,&nbsp;B.A. Shadwick","doi":"10.1016/j.nima.2025.170386","DOIUrl":"10.1016/j.nima.2025.170386","url":null,"abstract":"<div><div>In reducing the Low Lagrangian to a finite system for numerical computation it is generally the case that basic physical properties such as momentum and charge conservation are lost. Using a macro-particle reduction of the phase space distribution function we explore the conservation properties of continuous and discrete systems; we see that charge and momentum conservation rely on properties of the continuous system that are effected differently by the method of discretization. We present here three discretization schemes which preserve, respectively, the symmetries needed to conserve neither charge nor momentum, only momentum but not charge, and both charge and momentum.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170386"},"PeriodicalIF":1.5,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621518","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":"Source characterization of a detector for heavy and superheavy nuclei","authors":"P. Golubev ,&nbsp;R. Orford ,&nbsp;F.H. Garcia ,&nbsp;D. Rudolph ,&nbsp;L.G. Sarmiento ,&nbsp;R.M. Clark ,&nbsp;D.M. Cox ,&nbsp;J.M. Gates ,&nbsp;J.A. Gooding ,&nbsp;M. Grebo ,&nbsp;Y. Hrabar ,&nbsp;T.D. Kramasz ,&nbsp;M. McCarthy ,&nbsp;M.A. Mohamed ,&nbsp;J.L. Pore","doi":"10.1016/j.nima.2025.170384","DOIUrl":"10.1016/j.nima.2025.170384","url":null,"abstract":"<div><div>A new focal plane detector system for the Berkeley Gas-filled Separator (BGS) was designed, constructed, and tested offline with various <span><math><mi>α</mi></math></span>-decay and conversion-electron sources. The SuperHeavy RECoils (SHREC) detector comprises sets of double-sided silicon strip detectors arranged in an open-faced cuboid geometry. Alongside the detector upgrade new digital data acquisition electronics have been commissioned offline. This setup aims to detect separated recoiling heavy and superheavy nuclei as well as their correlated radioactive decay paths with improved energy resolution and overall sensitivity.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170384"},"PeriodicalIF":1.5,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621515","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":"Development and first measurement results of a 3.5-cells S-band RF gun with a photocathode for the SYLA synchrotron complex","authors":"I.A. Ashanin,&nbsp;A.A. Batov,&nbsp;T.V. Bondarenko,&nbsp;M.A. Gusarova,&nbsp;E.N. Indyushniy,&nbsp;Yu. D. Kliuchevskaia,&nbsp;M.V. Lalayan,&nbsp;S.M. Polozov,&nbsp;V.I. Rashchikov,&nbsp;N. Yu. Samarokov,&nbsp;M.V. Vladimirov,&nbsp;R.A. Zbruev","doi":"10.1016/j.nima.2025.170393","DOIUrl":"10.1016/j.nima.2025.170393","url":null,"abstract":"<div><div>Currently, the NRC «Kurchatov Institute»<!--> <!-->in collaboration with partners is developing the 4th generation synchrotron light source SYLA (Synchrotron + Laser) with an energy of 6 GeV. This facility will consist of a source based on a storage ring and a free-electron laser (FEL). As one of the options, a radiofrequency (RF) gun with a photocathode will be used to generate short high-brightness electron bunches for the FEL. The gun structure is composed of 3.5 <span><math><mi>π</mi></math></span>-mode standing wave accelerating cells at operating frequency of 2800 MHz with a coaxial RF coupler.</div><div>Previously, beam dynamics simulation, optimization of electrodynamic characteristics and thermal processes analysis were performed. So far, the manufacturing of the RF gun has been completed. The report presents the results of measurements of the prototype (the operating frequency, the axis electric field, quality factor).</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170393"},"PeriodicalIF":1.5,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593990","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":"Improved measurement of the neutron flux of CSNS Back-n ES#2 in low energy region from 0.3 eV to 150 keV","authors":"Yijia Qiu ,&nbsp;Yonghao Chen ,&nbsp;Qiang Li ,&nbsp;Jincheng Wang ,&nbsp;Jie Ren ,&nbsp;Shengda Tang ,&nbsp;Ruirui Fan ,&nbsp;Han Yi ,&nbsp;Jingyu Tang ,&nbsp;Changjun Ning ,&nbsp;Wei Jiang ,&nbsp;Yang Li ,&nbsp;Hantao Jing ,&nbsp;Zhixin Tan","doi":"10.1016/j.nima.2025.170383","DOIUrl":"10.1016/j.nima.2025.170383","url":null,"abstract":"<div><div>The Back-streaming neutron beamline (Back-n) at China Spallation Neutron Source (CSNS) is a newly built time-of-flight facility providing white neutrons from 0.3 eV to 300 MeV. The neutron flux of Back-n is of crucial importance for the feasibility studies of planned measurements and data analysis of conducted experiments. The initial neutron flux measurement of Back-n End Station 2 (ES#2) was conducted by a fission chamber. The measured flux was found to lack accuracy below 150 keV because the fission cross-section of ²³⁵U in this region is not a neutron cross-section standard. In this paper, we report an improved measurement of the energy-dependent neutron flux at ES#2 in low energy region based on <span><math><mrow><msup><mrow></mrow><mrow><mn>6</mn></mrow></msup><mi>Li</mi><mrow><mo>(</mo><mi>n</mi><mo>,</mo><mi>t</mi><mo>)</mo></mrow></mrow></math></span> reaction. The neutron flux was measured by a <span><math><msup><mrow></mrow><mrow><mn>6</mn></mrow></msup></math></span>Li-Si monitor from 0.3 eV to 150 keV, achieving an accuracy of 3.4%–6.7%. The flux shapes of ES#1 and ES#2 with the same beam configuration were compared as well. It was found that the difference in shape is energy-dependent and the maximum difference can reach up to approximately 20%, even though they were on the same beamline and used same beam configuration.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170383"},"PeriodicalIF":1.5,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579337","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":"Precise synchronization of a free-running Rubidium atomic clock with GPS Time for applications in experimental particle physics","authors":"Claire Dalmazzone ,&nbsp;Mathieu Guigue ,&nbsp;Lucile Mellet ,&nbsp;Boris Popov ,&nbsp;Stefano Russo ,&nbsp;Vincent Voisin ,&nbsp;Michel Abgrall ,&nbsp;Baptiste Chupin ,&nbsp;Caroline B. Lim ,&nbsp;Paul-Éric Pottie ,&nbsp;Pierre Ulrich","doi":"10.1016/j.nima.2025.170358","DOIUrl":"10.1016/j.nima.2025.170358","url":null,"abstract":"<div><div>We present results of our study devoted to the development of a time correction algorithm needed to precisely synchronize a free-running Rubidium atomic clock with the Coordinated Universal Time (UTC). This R&amp;D is performed in view of the Hyper-Kamiokande (HK) experiment currently under construction in Japan, which requires a synchronization with UTC and between its different experimental sites with a precision better than <span><math><mrow><mn>100</mn><mspace></mspace><mi>ns</mi></mrow></math></span>. We use a Global Navigation Satellite System (GNSS) receiver to compare a PPS and a 10 MHz signal, generated by a free-running Rubidium clock, to the Global Positioning System (GPS) Time signal. We use these comparisons to correct the time series (time stamps) provided by the Rubidium clock signal. We fit the difference between Rubidium and GPS Time with polynomial functions of time over a certain integration time window to extract a correction of the Rubidium time stamps in offline or online mode. In online mode, the latest fit results are used for the correction until a new comparison to GPS Time becomes available. We show that with an integration time window of around <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>4</mn></mrow></msup></mrow></math></span> seconds, we can correct the time stamps drift, caused by the frequency random walk noise and the deterministic frequency drift of the free running Rubidium clock, so that the time difference with respect to GPS Time stays within a <span><math><mrow><mo>±</mo><mn>5</mn><mspace></mspace><mi>ns</mi></mrow></math></span> range in both offline or online correction mode. Presented results could be of interest for other experiments in the field of neutrino physics and multi-messenger astrophysics.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170358"},"PeriodicalIF":1.5,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The kinetic inductance detectors for the MISTRAL instrument: Installation and characterization at the Sardinia Radio Telescope","authors":"A. Paiella ,&nbsp;F. Cacciotti ,&nbsp;G. Isopi ,&nbsp;E. Barbavara ,&nbsp;E.S. Battistelli ,&nbsp;P. de Bernardis ,&nbsp;V. Capalbo ,&nbsp;A. Carbone ,&nbsp;E. Carretti ,&nbsp;D. Ciccalotti ,&nbsp;F. Columbro ,&nbsp;A. Coppolecchia ,&nbsp;A. Cruciani ,&nbsp;G. D’Alessandro ,&nbsp;M. De Petris ,&nbsp;F. Govoni ,&nbsp;L. Lamagna ,&nbsp;P. Marongiu ,&nbsp;A. Mascia ,&nbsp;S. Masi ,&nbsp;G.P. Vargiu","doi":"10.1016/j.nima.2025.170373","DOIUrl":"10.1016/j.nima.2025.170373","url":null,"abstract":"<div><div>The MISTRAL instrument, a cryogenic W-band camera equipped with 415 lumped element kinetic inductance detectors, achieved a significant milestone in May 2023 with its successful installation at the Gregorian focus of the Sardinia Radio Telescope, a 64<!--> <!-->m aperture telescope in Italy. MISTRAL features a focal plane of approximately 94.4<!--> <!-->mm in diameter, providing an instantaneous field of view of about 4<!--> <!-->arcmin. To maintain the telescope’s angular resolution of <span><math><mrow><mo>∼</mo><mtext>12</mtext><mspace></mspace><mtext>arcsec</mtext></mrow></math></span>, the focal plane has been over-sampled with pixels separated by 4.2 mm, meaning a pixel separation of approximately 10.6<!--> <!-->arcsec. The lumped element kinetic inductance detectors in MISTRAL are made of a titanium–aluminum bilayer, <span><math><mrow><mn>10</mn><mo>+</mo><mtext>30</mtext><mspace></mspace><mtext>nm</mtext></mrow></math></span> thick, on a 100<!--> <!-->mm-diameter Silicon wafer, 235<!--> <!-->µm thick. The detectors are designed to have 415 resonances over a <span><math><mrow><mo>∼</mo><mtext>500</mtext><mspace></mspace><mtext>MHz</mtext></mrow></math></span> bandwidth, to work in a temperature range of 200 to 240<!--> <!-->mK, and to be sensitive in the W-band. In this contribution, we present the preliminary characterization of the MISTRAL detectors at the Sardinia Radio Telescope, comparing their performance to measurements conducted in the laboratory.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170373"},"PeriodicalIF":1.5,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}