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3D radiation-hydrodynamics simulations of octahedral spherical hohlraums 认领 引用 被引量：1
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作者 Rafael Ramis 《Matter and Radiation at Extremes》 SCIE EI CAS CSCD 2026年第2期74-84,共11页
Achieving uniform X-ray irradiation in indirect-drive inertial confinement fusion(ICF)is a key challenge for successful capsule implosion.Spherical hohlraums,particularly those with octahedral laser entrance holes(LEH... Achieving uniform X-ray irradiation in indirect-drive inertial confinement fusion(ICF)is a key challenge for successful capsule implosion.Spherical hohlraums,particularly those with octahedral laser entrance holes(LEHs),are an alternative to the cylindrical hohlraums currently considered for ICF at NIF(USA)and LMJ(France).These spherical hohlraums are advantageous in terms of irradiation uniformity on the fusion capsule because,owing to their octahedral symmetry,low-order asymmetries cancel out intrinsically.However,they may be less favorable from an energetic point of view,primarily owing to radiation losses through their multiple LEHs.The net balance of these advantages and disadvantages is difficult to determine,because,unlike cylindrical hohlraums,they require fully 3D modeling.To address this,a new version of the MULTI-3D simulation code has been developed.MULTI-3D is a 3D radiation-hydrodynamics code with arbitrary Langrangian-Eulerian(ALE)hydrodynamics,multigroup SN radiation transport,and ray-tracing laser deposition.Using this tool,several aspects of the behavior of spherical hohlraums have been analyzed,with special attention to phenomena inaccessible to 2D modeling.In these targets,laser beams strike the inner walls at very oblique angles,and the expansion of plasma significantly alters the locations where primary X rays are produced.Furthermore,the complex distribution of laser hot spots leads to mutual interactions,where plasma bubbles from one beam intersect the path of another.The laser-to-X-ray energy conversion efficiency has been analyzed as a function of key parameters.The symmetry on the capsule has also been evaluated,revealing nonuniformities of less than 1%. 展开更多
关键词 octahedral laser entrance holes lehs cylindrical hohlraums irradiation uniformity spherical hohlraums octahedral spherical hohlraums capsule implosion fusion capsule indirect drive inertial confinement fusion
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Adsorption behavior of spherical pores in shale integrated with simplified local density theory 认领 引用
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作者 Yu Zhao Da-Guo Quan +1 位作者 Chao-Lin Wang Kun-Peng Zhang 《Petroleum Science》 SCIE EI CAS CSCD 2026年第2期692-711,共20页
Shale is a strongly heterogeneous anisotropic porous medium with a complex nanopore structure.Therefore,accurately describing the distribution and occurrence of shale gas in the intricate pore structure of shale is di... Shale is a strongly heterogeneous anisotropic porous medium with a complex nanopore structure.Therefore,accurately describing the distribution and occurrence of shale gas in the intricate pore structure of shale is difficult.The simplified local density(SLD)theory constitutes an effective and widely accepted approach for characterizing the adsorption mechanism within the intricate pore structures of nanoporous shale.On the basis of SLD theory,this paper proposes for the first time a new adsorption model that considers spherical pores to accurately describe the adsorption behavior within the complex pore structure of shale containing spherical pores.Compared with conventional adsorption theory models and traditional SLD models,not only were the accuracy and applicability of the new model verified,but it was also found that the new model could significantly improve the effective calculation accuracy even with fewer fitting parameters.Furthermore,an analysis of and discussing the adsorption behavior of methane in shale pores with different pore structures(including pore geometries,specific surface areas,diamete rs and volumes)revealed that the pore structu re significantly affects the adsorption behavior of methane.The effects of the number of pore wall solid molecular layers that characterize different fluid-solid interactions and the adjustable parameters for repulsive forces that characterize different fluid-fluid interactions on the methane adsorption isotherms and density distributions were also explored.The results indicate that the newly developed spherical SLD model may provide new insights into the occurrence mode of shale gas in complex shale pores and offer valuable references for reserve assessment and extraction efficiency optimization in shale gas exploration. 展开更多
关键词 SLD model Spherical pore Adsorption Density profile Shale
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A spherical Eshelby inclusion with a Steigmann-Ogden interface in a finite domain 认领 引用
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作者 Xu WANG P.SCHIAVONE 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2026年第7期1569-1580,共12页
We derive closed-form solutions to the three-dimensional Eshelby's problem of a spherical Eshelby inclusion undergoing uniform deviatoric eigenstrains concentrically embedded in an isotropic elastic finite spheric... We derive closed-form solutions to the three-dimensional Eshelby's problem of a spherical Eshelby inclusion undergoing uniform deviatoric eigenstrains concentrically embedded in an isotropic elastic finite spherical domain with a traction-free or rigidly clamped boundary.The interface between the inclusion and its surrounding domain is assumed to be of Steigmann-Ogden type.Our solutions indicate that the stresses and strains within the spherical inclusion are generally nonuniform because of the effects of the finite spherical domain and the Steigmann-Ogden imperfect interface.The internal elastic field of stresses and strains is uniform within the spherical inclusion when a condition that relates the single interface parameter to the geometric parameter and Poisson's ratio of the finite domain is satisfied.When the spherical edge is rigidly clamped,a GurtinMurdoch interface is found to be sufficient to achieve this interior uniformity property.In contrast,when the spherical edge is traction-free,a Steigmann-Ogden interface with nonzero and positive bending stiffness parameters must be used to achieve the interior uniformity property. 展开更多
关键词 spherical inclusion spherical domain Steigmann-Ogden interface Gurtin-Murdoch interface Neumann problem Dirichlet problem uniformity property
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Analytical solution of Mises elastoplastic solid spherical cavity expansion model considering initial hole and elastoplastic continuity 认领 引用
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作者 Yiding Wu Guangfa Gao 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第4期327-343,共17页
The cavity expansion model(CEM)holds significant engineering value for high-speed impact and blast analysis,yet its theoretical development suffers from three critical limitations:failure to quantify the influence of ... The cavity expansion model(CEM)holds significant engineering value for high-speed impact and blast analysis,yet its theoretical development suffers from three critical limitations:failure to quantify the influence of elastic strain accumulation on initial cavity size,solution discontinuity caused by conceptual confusion between elastic/plastic compressibility,and inadequate applicability of traditional solutions to non-zero initial cavity conditions.This study establishes a unified theoretical framework within the Eulerian framework based on the quasi-static spherical CEM,simultaneously considering both compressibility and incompressibility during the plastic phase.By introducing initial cavity size and elastic pre-strain,we derived a general analytical solution enabling continuous elastic-plastic transition,supported by numerical validation.The results demonstrate that incorporating both elastic compressibility and initial cavity size under plastic incompressibility assumptions yields continuous analytical solutions.For cavity wall pressure evolution,the improved theory shows closer alignment with numerical solutions in pre-critical pressure regimes,accurately captures momentum conservation characteristics under highpressure conditions,and resolves longstanding ambiguities in volumetric compressibility concepts. 展开更多
关键词 Spherical cavity expansion theory Mises elastoplasticity Elastoplastic mechanics Penetration mechanics
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Analysis Model for Pressure Wave during Spherical Projectile Water Entry considering Reflection from Preset Air Layer 认领 引用
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作者 WU Meng-meng HOU Hai-liang +2 位作者 LI Dian YANG Shao-hong LI Yong-qing 《船舶力学》 EI CSCD 北大核心 2026年第6期853-870,共18页
To analyze the propagation of pressure waves generated during spherical projectile water entry within liquid-filled structures,this study establishes a computational model for the pressure wave considering reflection ... To analyze the propagation of pressure waves generated during spherical projectile water entry within liquid-filled structures,this study establishes a computational model for the pressure wave considering reflection from a preset air layer.The model combines the virtual and real mirror methods with potential flow theory,and its accuracy is validated through numerical simulations.Using the established model,the propagation processes of the pressure wave during projectile water entry within liquid-filled structures configured with either a top air layer or a centrally located spherical air layer are examined.The effects of air layer height h,spherical air layer center location D and radius r on the strength and propagation of the pressure wave in water are analyzed.The results show that the rarefaction wave reflected from the air layer interface induces a truncation effect on the pressure wave propagation,significantly reducing the duration of positive pressure and the specific impulse.Moreover,the specific impulse decreases as h and r increase.A smaller D leads to more significant attenuation of the initial pressure wave specific impulse,while a larger D results in more noticeable attenuation of the secondary pressure wave peak and its specific impulse. 展开更多
关键词 spherical projectile water entry pressure wave preset air layer truncation effect
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Hydrogen-Bonded Interfacial Super-Assembly of Spherical Carbon Superstructures for High-Performance Zinc Hybrid Capacitors 认领 引用 被引量：3
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作者 Yang Qin Chengmin Hu +4 位作者 Qi Huang Yaokang Lv Ziyang Song Lihua Gan Mingxian Liu 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第2期88-104,共17页
Carbon superstructures with multiscale hierarchies and functional attributes represent an appealing cathode candidate for zinc hybrid capacitors,but their tailor-made design to optimize the capacitive activity remains... Carbon superstructures with multiscale hierarchies and functional attributes represent an appealing cathode candidate for zinc hybrid capacitors,but their tailor-made design to optimize the capacitive activity remains a confusing topic.Here we develop a hydrogen-bond-oriented interfacial super-assembly strategy to custom-tailor nanosheet-intertwined spherical carbon superstructures(SCSs)for Zn-ion storage with double-high capacitive activity and durability.Tetrachlorobenzoquinone(H-bond acceptor)and dimethylbenzidine(H-bond donator)can interact to form organic nanosheet modules,which are sequentially assembled,orientally compacted and densified into well-orchestrated superstructures through multiple H-bonds(N-H···O).Featured with rich surface-active heterodiatomic motifs,more exposed nanoporous channels,and successive charge migration paths,SCSs cathode promises high accessibility of built-in zincophilic sites and rapid ion diffusion with low energy barriers(3.3Ωs-0.5).Consequently,the assembled Zn||SCSs capacitor harvests all-round improvement in Zn-ion storage metrics,including high energy density(166 Wh kg-1),high-rate performance(172 m Ah g-1at 20 A g-1),and long-lasting cycling lifespan(95.5%capacity retention after 500,000 cycles).An opposite chargecarrier storage mechanism is rationalized for SCSs cathode to maximize spatial capacitive charge storage,involving high-kinetics physical Zn2+/CF3SO3-adsorption and chemical Zn2+redox with carbonyl/pyridine groups.This work gives insights into H-bond-guided interfacial superassembly design of superstructural carbons toward advanced energy storage. 展开更多
关键词 Hydrogen bonds Interfacial super-assembly Spherical carbon superstructures Zn hybrid capacitors Energy storage
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Design and calibration of spherical particles with embedded inertial measurement unit:preserving kinematic equivalence 认领 引用
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作者 Jiajun Jiao Yunhui Sun +2 位作者 Yi An Qingquan Liu Xiaoliang Wang 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第4期625-638,共14页
This study presents the design,verification,and calibration of a spherical inertial sensor particle engineered to achieve kinematic equivalence with a solid sphere.Utilizing micro-electro-mechanical systems inertial m... This study presents the design,verification,and calibration of a spherical inertial sensor particle engineered to achieve kinematic equivalence with a solid sphere.Utilizing micro-electro-mechanical systems inertial measurement unit technology,this 40 mm particle is capable of measuring triaxial acceleration up to±16g(g=9.81 m/s2)and triaxial angular velocity up to±2000°/s,with a high sampling rate of 1000 Hz sustained over one hour.The sensor particle features a dual-layered spherical structure designed to ensure equivalence in shape,density,center of mass,moment of inertia,and elastic modulus compared to a solid sphere.The performance of the sphere is calibrated and verified with a series of physical experiments.The experiment of the sphere freely sinking in still water confirmed the accuracy of the data measured by the sensor particle and its equivalence to a solid aluminum sphere.This study provides a more representative tool for measuring particle motion information in homogeneous dense granular experiments. 展开更多
关键词 Sensor embedded particle Spherical particle Kinematic equivalence MEMS-IMU Particle motion measurement
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Lp→LqEstimates for Stein’s Spherical Maximal Operators 认领 引用
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作者 Naijia Liu Minxing Shen +1 位作者 Liang Song Lixin Yan 《Analysis in Theory and Applications》 CSCD 2026年第1期90-108,共19页
In this article we consider a modification of the Stein’s spherical maximal operator of complex order a on Rn:■We show that when n≥,suppose||mα[1,2]f||Lq(Rn)≤C||f||Lp(Rn)holds for someα∈C,... In this article we consider a modification of the Stein’s spherical maximal operator of complex order a on Rn:■We show that when n≥,suppose||mα[1,2]f||Lq(Rn)≤C||f||Lp(Rn)holds for someα∈C,p,q≥,then we must have that q≥p and Reα≥σn(p,q):=max{1/p-n/q,n+1/2p-n-1/2(1/q+1),n/p-n+1}.Conversely,we show that Mα[1,2]is bounded from Lp(Rn)to Lq(Rn)provided that q≥p and Reα>σ2(p,q)for n=2;and Reα>max{σn(p,q),1/(2p)-(n-2)/(2q)-(n-1)/4}for n>2.The range ofα,p and q is almost optimal in the case when either n=2,or a=0,or(p,q)lies in certain regions for n>2. 展开更多
关键词 spherical maximal operators Lp-improving estimates wave equation local smoothing estimates
Ultra-high-precision fused silica micro-hole machining via spherical aberration-assisted filamentation and laser-induced deep etching 认领 引用
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作者 Seunghyun Bang Seonghyeon Kang +3 位作者 Hyunjong Lee Hyungsik Kim Seok Ho Song Kwang-Geol Lee 《Advanced Photonics Nexus》 CSCD 2026年第2期46-54,共9页
Glass materials play an increasingly important role in advanced technologies due to their superior physical properties.However,precise machining of glass remains a major challenge because of its brittleness and sensit... Glass materials play an increasingly important role in advanced technologies due to their superior physical properties.However,precise machining of glass remains a major challenge because of its brittleness and sensitivity to thermal and mechanical stresses.We present an approach that combines sphericalaberration–assisted filamentation with laser-induced deep etching to achieve ultra-high-precision micro-hole machining in fused silica substrates.By deliberately introducing spherical aberration into an intense femtosecond laser beam,thin,uniformly elongated,and stable filaments are generated,which effectively suppress unwanted plasma formation and thermal deformation typical of standard filamentation.Using this method,we fabricated micro-holes with diameters as small as 10μm across various sizes,maintaining an almost zero taper even in 1-mm-thick samples.The sidewalls exhibited nanoscale smoothness(Ra=38.1 nm,root mean square(RMS)=53.9 nm),and the hole area demonstrated excellent repeatability with only~1.0%variation across multiple trials.This simple optical configuration drastically reduces cost compared with existing approaches that rely on specialized components while moderately satisfying critical requirements for geometrical versatility,minimal damage,precision,and repeatability.We represent a significant step forward in precision glass machining and lay a foundation for future microstructured electronic,optical,and microfluidic devices. 展开更多
关键词 glass machining spherical aberration laser filament laser-induced deep etching femtosecond laser processing
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Curvature-driven shifts of the Potts transition on spherical Fibonacci graphs:A graph-convolutional transfer-learning study 认领 引用
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作者 Zheng Zhou Xu-Yang Hou Hao Guo 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第7期495-508,共14页
We investigate the ferromagnetic q-state Potts model on spherical Fibonacci graphs.These graphs are constructed by embedding quasi-uniform sites on a sphere and defining interactions via a chord-distance cutoff chosen... We investigate the ferromagnetic q-state Potts model on spherical Fibonacci graphs.These graphs are constructed by embedding quasi-uniform sites on a sphere and defining interactions via a chord-distance cutoff chosen so as to yield a network approximating four-neighbor connectivity.By combining Swendsen-Wang cluster Monte Carlo simulations with graph convolutional networks(GCNs),which operate directly on the adjacency structure and node spins,we develop a unified phase-classification framework applicable to both regular planar lattices and curved,irregular spherical graphs.Benchmarks on planar lattices demonstrate an efficient transfer strategy:after a fixed binarization of Potts spins into an effective Ising variable,a single GCN pre-trained on the Ising model can localize the transition region for different q values without retraining.Applying this strategy to spherical graphs,we find that curvature-and defect-induced connectivity irregularities induce only modest shifts in the inferred transition temperatures relative to their planar counterparts.Further analysis shows that the curvature-induced shift of the critical temperature is most pronounced at small q and diminishes rapidly as q increases.This trend is consistent with the physical picture that,in two dimensions,the Potts model undergoes a transition from a continuous phase transition to a weakly first-order one for q>4,accompanied by a pronounced reduction in the correlation length. 展开更多
关键词 q-state Potts model spherical fibonacci graphs graph convolutional networks(GCNs) critical temperature
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Incorporating Confidence of Evidence in Diabetes Diagnosis Using Disc T-Spherical Fuzzy Sets with AHP-TOPSIS Framework 认领 引用
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作者 Wafa Alagal Zanyar A.Ameen 《Computer Modeling in Engineering & Sciences》 SCIE EI 2026年第6期1104-1133,共30页
Diabetes remains a major global health challenge and requires diagnostic systems capable of handling uncertainty and sometimes conflicting clinical evidence.In this study,a Disc T-Spherical Fuzzy(DT-SF)TOPSIS framewor... Diabetes remains a major global health challenge and requires diagnostic systems capable of handling uncertainty and sometimes conflicting clinical evidence.In this study,a Disc T-Spherical Fuzzy(DT-SF)TOPSIS framework is proposed for diabetes risk assessment,where the radius parameter is used to encode the confidence associated with each diagnostic attribute.The methodology also integrates the Analytic Hierarchy Process(AHP)to determine the relative importance of several key risk factors,including blood glucose,body mass index,family history,lifestyle factors,and clinical symptoms.One important feature of the proposed approach is the ternary classification scheme,which categorizes patients as Non-diabetic(N),Prediabetic(P),or Diabetic(D).In particular,this scheme allows the explicit identification of patients located in a grey zone(Class P),where early monitoring and preventive intervention may be beneficial.The proposed framework is evaluated using the Pima Indians Diabetes Dataset(PIDD).The obtained results show that the ternary DT-SF TOPSIS model achieves 89.14%accuracy,while the conventional binary thresholding method reaches 75.9i%.Further analysis of the Closeness Coefficient(CC)distributions,together with threshold sensitivity examination,supports the robustness and interpretability of the proposed framework.Overall,the findings indicate that the DT-SF TOPSIS model provides a practical,confidenceweighted,and uncertainty-aware tool for multi-criteria diabetes risk assessment,with possible applications to other chronic diseases. 展开更多
关键词 Spherical fuzzy sets circular T-spherical fuzzy sets disc T-spherical fuzzy sets TOPSIS diabetes diagnosis
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Mission capability assessment of UAV swarms based on UAF and interval-valued spherical fuzzy ANP 认领 引用
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作者 LI Minghao ZHANG An +2 位作者 BI Wenhao FAN Qiucen YANG Pan 《Journal of Systems Engineering and Electronics》 SCIE CSCD 2026年第1期225-241,共17页
For mission-oriented unmanned aerial vehicle(UAV)swarms,mission capability assessment provides an important reference in the design and development process,and is a precondition for mission success.For this multi-crit... For mission-oriented unmanned aerial vehicle(UAV)swarms,mission capability assessment provides an important reference in the design and development process,and is a precondition for mission success.For this multi-criteria decisionmaking(MCDM)problem,the current literature lacks a way to unambiguously present criteria and the popular fuzzy analytic network process(ANP)approaches neglect the hesitancy of subjective judgments.To fill these research gaps,an MCDM method based on unified architecture framework(UAF)and interval-valued spherical fuzzy ANP(IVSF-ANP)is proposed in this paper.Firstly,selected viewpoints in UAF are extended to construct criteria models with standardized representation.Secondly,interval-valued spherical fuzzy sets are introduced to ANP to weight interdependent criteria,handling fuzziness and hesitancy in pairwise comparisons.A method of adjusting weights of experts based on their decision similarities is also included in this process to reduce ambiguity brought by multiple experts.Next,performance characteristics are non-linearly transformed regarding to expectations to get final results.This proposition is applied to assess the mission capability of UAV swarms to search and strike surface vessels.Comparative analysis shows that the proposed method is valid and reasonable. 展开更多
关键词 unmanned aerial vehicle(UAV)swarm capability assessment multi-criteria decision-making(MCDM) unified architecture framework interval-valued spherical fuzzy set analytical network process(ANP)
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Controlling crystallization pathway for synthesizing high-polishing performance spherical cerium oxide 认领 引用 被引量：7
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作者 Zhenyu Zhang Da Guan +8 位作者 Ning Wang Xianmin Tan Xingzi Wang Zongyu Feng Yuanyuan Zheng Xiangxi Zhong Xinxin Wang Juanyu Yang Xiaowei Huang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2025年第5期1046-1056,共11页
Rare earth carbonates are essential precursors for the synthesis of oxide materials.In this study,we utilized in situ monitoring equipment to explore the alterations in the crystallization during the coprecipitation s... Rare earth carbonates are essential precursors for the synthesis of oxide materials.In this study,we utilized in situ monitoring equipment to explore the alterations in the crystallization during the coprecipitation synthesis of cerium carbonate.By controlling the crystallization pathway and in the absence of any te mplating agents,we successfully synthesized a unique sphe rical self-assembled cerium oxide particle(Ceria-S).The Ceria-S exhibits excellent polishing performance.The crystallization process of cerium carbonate at 50℃persists for roughly 50 min.During the initial stages of crystallization from 0 to t3,the precipitated particles are amorphous.This is followed by a plateau phase of crystal growth from t3to t5.Subsequently,during the burst crystallization phase from t5to t6,Ce2(CO3)3·6H2O and Ce2O(CO3)2·nH2O are formed,exhibiting a rod-like crystal morphology.By rapidly drying the precipitated particles at 60℃for 10 min and calcining,Ceria-S is obtained.The Ceria-S,with an average diameter of 180 nm,is assembled from primary cerium oxide nanoparticles of approximately 15 nm.Owing to the self-assembly structure of cerium oxide spherical nanoparticles,they exhibit a significantly larger specific surface area,resulting in an elevated concentration of Ce3+as high as 35.5%.The Ceria-S exhibits a polishing removal rate of 420 nm/min,effectively decreasing the surface roughness(Sa)of K9 glass from 1.605 to 0.404 nm. 展开更多
关键词 Spherical cerium oxide Chemical mechanical polishing In situ monitoring Crystallization pathway Self-assembled Rare earths
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Strategy and experimental progress of the EXL-50U spherical torus in support of the EHL-2 project 认领 引用 被引量：1
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作者 Yuejiang SHI Xianming SONG +40 位作者 Dong GUO Xinchen JIANG Xiang GU Lili DONG Xueyun WANG Tiantian SUN Muzhi TAN Zhengyuan CHEN Guang YANG Danke YANG Huasheng XIE Hanyue ZHAO Yong LIU Renyi TAO Jia LI Songjian LI Fan GAO Yihang ZHAO Yupeng ZHANG Cong ZHANG Hongda HE Enwu YANG Yuanming YANG Yu WANG Shaodong SONG Lei HAN Bo XING Pengmin LI Zhenxing WANG Peihai ZHOU Wenwu LUO Yumin WANG Bing LIU Chao WU Xin ZHAO Yunfeng LIANG Jiaqi DONG Baoshan YUAN Y-K Martin PENG Minsheng LIU the EXL-50U Team 《Plasma Science and Technology》 SCIE EI CSCD 2025年第2期34-44,共11页
The EXL-50U is China’s first large spherical torus device with a toroidal field reaching 1 T.The major radius of the EXL-50U ranges from 0.6 m to 0.8 m,with an aspect ratio of 1.4−1.8.The goal of plasma current in th... The EXL-50U is China’s first large spherical torus device with a toroidal field reaching 1 T.The major radius of the EXL-50U ranges from 0.6 m to 0.8 m,with an aspect ratio of 1.4−1.8.The goal of plasma current in the first experimental phase is 500 kA,and in the future second phase,the goal of plasma current is 1 MA.On the EXL-50U project,the ENN fusion team expeditiously accomplished a series of comprehensive tasks including physical and engineering design,main component construction installation,and system commissioning,all within a mere eighteen-month timeframe.In the experiments of 2024,the EXL-50U achieved a 500 kA limiter configuration discharge using ECRH(Electron Cyclotron Resonance Heating)for non-inductive current start-up and a current ramp-up with the synergetic effect of ECRH and central solenoid(CS).Preliminary divertor configuration plasmas were also obtained under 200 kA plasma current.The core ion temperature of 1 keV was achieved with low-power NBI heating,and the energy confinement time of 30 ms was reached with Ohmic heating in the flat-top phase.The current and future experiments of EXL-50U will strongly support the physical design and operational scenarios of EHL-2 in the areas of current drive,high ion temperature exploration,energy transport and confinement,and hydrogen-boron physical characteristics.At the same time,the experience in the design,construction,and commissioning of the engineering,heating,and diagnostics systems on EXL-50U is also very beneficial for enhancing the feasibility of the engineering design for EHL-2. 展开更多
关键词 EXL-50U EHL-2 spherical torus
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Overview of the physics design of the EHL-2 spherical torus 认领 引用 被引量：1
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作者 Yunfeng LIANG Huasheng XIE +24 位作者 Yuejiang SHI Xiang GU Xinchen JIANG Lili DONG Xueyun WANG Danke YANG Wenjun LIU Tiantian SUN Yumin WANG Zhi LI Jianqing CAI Xianming SONG Muzhi TAN Guang YANG Hanyue ZHAO Jiaqi DONG Yueng-Kay Martin PENG Shaodong SONG Zhengyuan CHEN Yingying LI Bing LIU Di LUO Yuanming YANG Minsheng LIU the EHL-2 Teama 《Plasma Science and Technology》 SCIE EI CSCD 2025年第2期4-23,共20页
ENN is planning the next generation experimental device EHL-2 with the goal to verify the thermal reaction rates of p-11B fusion,establish spherical torusokamak experimental scaling laws at 10’s keV ion temperatur... ENN is planning the next generation experimental device EHL-2 with the goal to verify the thermal reaction rates of p-11B fusion,establish spherical torusokamak experimental scaling laws at 10’s keV ion temperature,and provide a design basis for subsequent experiments to test and realize the p-11B fusion burning plasma.Based on 0-dimensional(0-D)system design and 1.5-dimensional transport modelling analyses,the main target parameters of EHL-2 have been basically determined,including the plasma major radius,R0,of 1.05 m,the aspect ratio,A,of 1.85,the maximum central toroidal magnetic field strength,B0,of 3 T,and the plasma toroidal current,Ip,of 3 MA.The main heating system will be the neutral beam injection at a total power of 17 MW.In addition,6 MW of electron cyclotron resonance heating will serve as the main means of local current drive and MHD instabilities control.The physics design of EHL-2 is focused on addressing three main operating scenarios,i.e.,(1)high ion temperature scenario,(2)high-performance steady-state scenario and(3)high triple product scenario.Each scenario will integrate solutions to different important issues,including equilibrium configuration,heating and current drive,confinement and transport,MHD instability,p-11B fusion reaction,plasma-wall interactions,etc.Beyond that,there are several unique and significant challenges to address,including●establish a plasma with extremely high core ion temperature(Ti,0>30 keV),and ensure a large ion-to-electron tempera-ture ratio(Ti,0/Te,0>2),and a boron concentration of 10%‒15%at the plasma core;●realize the start-up by non-inductive current drive and the rise of MA-level plasma toroidal current.This is because the volt-seconds that the central solenoid of the ST can provide are very limited;●achieve divertor heat and particle fluxes control including complete detachment under high P/R(>20 MW/m)at rela-tively low electron densities.This overview will introduce the advanced progress in the physics design of EHL-2. 展开更多
关键词 spherical torus proton-boron fusion thermal reaction rate alpha particles
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Study of the Transport Behavior of Multispherical Proppant in Intersecting Fracture Based on Discrete Element Method 认领 引用 被引量：1
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作者 Chengyong Peng JianshuWu +2 位作者 Mao Jiang Biao Yin Yishan Lou 《Energy Engineering》 EI 2025年第1期185-201,共17页
To analyze the differences in the transport and distribution of different types of proppants and to address issues such as the short effective support of proppant and poor placement in hydraulically intersecting fract... To analyze the differences in the transport and distribution of different types of proppants and to address issues such as the short effective support of proppant and poor placement in hydraulically intersecting fractures,this study considered the combined impact of geological-engineering factors on conductivity.Using reservoir production parameters and the discrete elementmethod,multispherical proppants were constructed.Additionally,a 3D fracture model,based on the specified conditions of the L block,employed coupled(Computational Fluid Dynamics)CFD-DEM(Discrete ElementMethod)for joint simulations to quantitatively analyze the transport and placement patterns of multispherical proppants in intersecting fractures.Results indicate that turbulent kinetic energy is an intrinsic factor affecting proppant transport.Moreover,the efficiency of placement and migration distance of low-sphericity quartz sand constructed by the DEM in the main fracture are significantly reduced compared to spherical ceramic proppants,with a 27.7%decrease in the volume fraction of the fracture surface,subsequently affecting the placement concentration and damaging fracture conductivity.Compared to small-angle fractures,controlling artificial and natural fractures to expand at angles of 45°to 60°increases the effective support length by approximately 20.6%.During hydraulic fracturing of gas wells,ensuring the fracture support area and post-closure conductivity can be achieved by controlling the sphericity of proppants and adjusting the perforation direction to control the direction of artificial fractures. 展开更多
关键词 Hydraulic fracturing discrete element method proppant sphericity CFD-DEM
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Thermal proton-boron fusion on spherical torus 认领 引用
17
作者 Jiaqi DONG Wei CHEN +4 位作者 Zhongyong CHEN Zhengxiong WANG Qingwei YANG Minyou YE Qingquan YU 《Plasma Science and Technology》 SCIE EI CSCD 2025年第2期1-3,共3页
Significant progress has been made in magnetic and inertial confinement fusion(MCF and ICF)energy development since the achievement of world record parameters on the T3 tokamak in 1968.In MCF,the triple product nτT h... Significant progress has been made in magnetic and inertial confinement fusion(MCF and ICF)energy development since the achievement of world record parameters on the T3 tokamak in 1968.In MCF,the triple product nτT has been elevated from 5×1017m-3·s·keV to 1×1021m-3·s·keV.At the same time,Q=Pfusion/Pheating,has increased from 1×10-9to 0.67,with expectations to exceed 10 in the ITER experiment.In ICF,a Q value of approximately 2.4 was attained with a fusion energy output of around 5.2 MJ. 展开更多
关键词 tokamak spherical energy
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Transport analysis of the EHL-2 spherical torus in a high-ion-temperature scenario 认领 引用
18
作者 Xueyun WANG Wenjun LIU +12 位作者 Danke YANG Guang YANG Muzhi TAN Xinchen JIANG Huasheng XIE Yuejiang SHI Hanyue ZHAO Yumin WANG Yunfeng LIANG Jiaqi DONG Bin WU Chengyue LIU the EHL-2 Team 《Plasma Science and Technology》 SCIE EI CSCD 2025年第2期75-86,共12页
EHL-2 is an ENN second-generation device aimed at studying proton-boron(p-11B)fusion reactions in a spherical torus.The design parameters are Ti0~30 keV,Ti/Te>2,ne0~1×1020m-3,Ip~3 MA,Bt~3 T,and... EHL-2 is an ENN second-generation device aimed at studying proton-boron(p-11B)fusion reactions in a spherical torus.The design parameters are Ti0~30 keV,Ti/Te>2,ne0~1×1020m-3,Ip~3 MA,Bt~3 T,andτE~0.5 s.High ion temperature is one of the standard operation scenarios of EHL-2,aiming to reduce bremsstrahlung radiation while enhancing plasma parameters by elevating the ion to electron temperature ratio.In order to achieve high ion temperature,neutral beam injection is considered the primary heating method during the flat-top phase.The neutral beam system for EHL-2 comprises 3-5 beams with energy/power ranging from 60 keV/4 MW,80-100 keV/10 MW,to 200 keV/3 MW.This work conducts predictive analysis on core transport during the flat-top phase of EHL-2’s high-ion-temperature scenario utilizing ASTRA.The study delineates the potential operating range of core temperature and other parameters given the designed heating capacity.Specifically,the study presents predictive simulations based on CDBM,GLF23,Bohm-gyro-Bohm,and IFSPPPL transport models,evaluating the steady-state power balance,energy confinement time,and impact of various parameters such as plasma density and NBI power on core ion temperature.The simulations demonstrate that the design parameters of the EHL-2 high-Ti scenario,although sensitive to varying transport models,are hopefully attainable as long as adequate ion heating and controlled ion transport levels are ensured. 展开更多
关键词 transport ASTRA hot-ion mode spherical torus
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Adsorption,separation and recovery performance of spherical PR/CMC/AC composites for cadmium-contaminated soil remediation 认领 引用
19
作者 Fan Zhang Miaomiao Zhao +2 位作者 Xiaoyu Jia Chen Li Degang Ma 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2025年第7期199-207,共9页
Activated carbon(AC)is considered to be an excellent adsorbent due to its high specific surface area and various functional groups.AC powders are available in sizes ranging from 44 to 150 μm.Its particle size prevent... Activated carbon(AC)is considered to be an excellent adsorbent due to its high specific surface area and various functional groups.AC powders are available in sizes ranging from 44 to 150 μm.Its particle size prevent its separation from the soil.Therefore,when AC powder is applied to Cd-contaminated soil,it only reduces the bioavailability of Cd and Cd is not necessarily removed but semi-immobilized.Recovery of adsorbent materials from the soil is therefore a preferred soil remediation method.In order to achieve the separation of Cd from soil and the recovery and reuse of AC,a batch of phenolic resin(PR)-carboxymethyl cellulose(CMC)-activated carbon(AC)composite(PCC-800)with uniform particle diameter(diameter 0.8 mm)and high compressive strength was prepared.PCC-800 composites were made of PR/CMC/AC calcined at 800℃ in a certain ratio.The Barrett-Joyner-Halender results showed that the PCC-800 spheres own a mesoporous structure.The compressive strength of PCC-800 pellets was 20.6 N.After first adsorption cycle,total Cd in the soil decreased by 52.18%while bioavailable Cd decreased to 25.68%of the original soil.After three cycles,the recovery rates of PCC-800 were 90.37%and the adsorption regeneration was 72.73%.The PCC-800 immobilized Cd by adsorption,precipitation and complexation reaction.This study demonstrates the potential for developing adsorbents that are both easily separable from soil and highly effective in adsorption. 展开更多
关键词 Cd Spherical activated carbon composites Adsorption Recovery
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Disruption prediction and mitigation strategies in the EHL-2 spherical torus 认领 引用
20
作者 Jianqing CAI Yunfeng LIANG +6 位作者 Zhongyong CHEN Wei ZHENG Di HU Lei XUE Zhifang LIN Xiang GU the EHL-2 Team 《Plasma Science and Technology》 SCIE EI CSCD 2025年第2期143-152,共10页
EHL-2 is a compact,high-field spherical tokamak designed to explore the potential of an advanced p-11B nuclear fusion reactor.Due to its high plasma current and thermal energy,it is crucial to mitigate the impact asso... EHL-2 is a compact,high-field spherical tokamak designed to explore the potential of an advanced p-11B nuclear fusion reactor.Due to its high plasma current and thermal energy,it is crucial to mitigate the impact associated with disruptions to ensure the safe operation of EHL-2.This paper evaluates the performance requirements of the disruption prediction system on EHL-2,with a particular focus on applying generalizable knowledge transfer from existing devices to future ones.Furthermore,the key characteristics of disruption mitigation strategies are analyzed,and their overall mitigation performance on EHL-2 is assessed.This insight provides valuable guidance for optimizing the engineering design of EHL-2 and identifying its optimal operational regime. 展开更多
关键词 spherical tokamak EHL-2 disruption mitigation disruption prediction neural network
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