ieeexplore最新文献_第3页

The Impact of the Generalized (r, q) Distributed Electrons on the Formation of Solitary Wave Structure in Magnetized Negative Ion Plasma 广义（r，q）分布电子对磁化负离子等离子体中孤波结构形成的影响

IF 1.3 1区化学

Accounts of Chemical Research Pub Date : 2024-10-24 DOI: 10.1109/TPS.2024.3472696

N. Akhtar;S. Hussain

引用次数: 0

Efficiency Study of Hybrid Armatures With Coil Launchers of Different Calibres 带不同口径线圈发射器的混合电枢效率研究

IF 1.3 1区化学

Accounts of Chemical Research Pub Date : 2024-10-24 DOI: 10.1109/TPS.2024.3476451

Yadong Zhang;Ao Zhou;Xiong Lin;Zhiqiang Sun

{"title":"Efficiency Study of Hybrid Armatures With Coil Launchers of Different Calibres","authors":"Yadong Zhang;Ao Zhou;Xiong Lin;Zhiqiang Sun","doi":"10.1109/TPS.2024.3476451","DOIUrl":"https://doi.org/10.1109/TPS.2024.3476451","url":null,"abstract":"Improving efficiency is a major area of research in the field of coil launchers. Two types of coil launchers are the reluctance coil launcher and the induction coil launcher. Reluctance coil launchers use a ferromagnetic armature, which is generally smaller in diameter due to the armature’s magnetic saturation and higher density, while induction coil launchers use a conductive armature, which is generally larger in diameter. To improve the efficiency of coil launchers, this article proposes a hybrid armature structure for coil launchers in which the front end of the ferromagnetic armature is placed at the end of the coil and connected to the conductive armature by an insulating material half the length of the coil. To compare the efficiency of the hybrid armature with that of the original armature, three coil launchers of 11.8, 18.4, and 50 mm bore were selected to simulate the hybrid armature with different parameters and to verify the consistency of the simulation and experiment of the hybrid armature. The final results show that the efficiency of the ferromagnetic armature is better than that of the hybrid armature at 11.8 mm aperture. At 18.4 mm, the hybrid armature efficiency is 9.12%, an improvement of 4.08% compared to the original ferromagnetic armature. At 50 mm bore, at 1000 V, the optimum efficiency of the hybrid armature is 3.17%, an improvement of 2.73% compared to an aluminum armature of the same mass with load, at 2000 V, the optimum efficiency of the hybrid armature is 7.87%, an improvement of 5% compared to an aluminum armature of the same mass with load, and at 3000 V, the efficiency of the hybrid armature is lower than that of the aluminum armature directly with load. The findings provide new and effective ideas for improving the efficiency of coil launchers.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":"52 8","pages":"3352-3359"},"PeriodicalIF":1.3,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two-Dimensional Particle-in-Cell/Monte Carlo Collisional Simulation of the Post-Arc Breakdown in Vacuum Circuit Breakers 真空断路器弧后击穿的二维粒子池/蒙特卡洛碰撞模拟

IF 1.3 1区化学

Accounts of Chemical Research Pub Date : 2024-10-24 DOI: 10.1109/TPS.2024.3449271

Lijun Wang;Zhuo Chen;Dan Wang;Zhuoxi Lian;Zhiwei Wang;Runming Zhang

{"title":"Two-Dimensional Particle-in-Cell/Monte Carlo Collisional Simulation of the Post-Arc Breakdown in Vacuum Circuit Breakers","authors":"Lijun Wang;Zhuo Chen;Dan Wang;Zhuoxi Lian;Zhiwei Wang;Runming Zhang","doi":"10.1109/TPS.2024.3449271","DOIUrl":"https://doi.org/10.1109/TPS.2024.3449271","url":null,"abstract":"Vacuum circuit breakers are widely used in medium-voltage power systems, and the post-arc breakdown is a key factor limiting performance of the vacuum circuit breakers. In this work, a 2-D particle-in-cell/Monte Carlo collisional model is developed to investigate the post-arc breakdown. The residual plasma, metal vapor, inhomogeneous temperature distribution and electron emission on the post-arc cathode surface and various collisions between charged particles, and metal vapor are taken into consideration in the model. Simulation results show that the post-arc breakdown initiates in the vicinity of the post-arc cathode center. At the moment when the post-arc breakdown occurs, a potential hump forms near the post-arc cathode center, and the plasma density increases by two orders, which are consistent with the published result obtained by 1-D hybrid simulation model. Simulation results on the effect of metal vapor density show that the post-arc breakdown occurs earlier with increasing metal vapor density, and the post-arc breakdown cannot occur when the metal vapor density is below 1020 m−3.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":"52 8","pages":"3228-3236"},"PeriodicalIF":1.3,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the Principle and Performance of a Novel Synchronous Cascaded Air-Core Brushless Compulsator 新型同步级联气芯无刷永磁发电机的原理与性能研究

IF 1.3 1区化学

Accounts of Chemical Research Pub Date : 2024-10-24 DOI: 10.1109/TPS.2024.3417518

Bofeng Zhu;Guanxiang Zhang;Xiao Zhang;Yun Guo;Junyong Lu

{"title":"Study on the Principle and Performance of a Novel Synchronous Cascaded Air-Core Brushless Compulsator","authors":"Bofeng Zhu;Guanxiang Zhang;Xiao Zhang;Yun Guo;Junyong Lu","doi":"10.1109/TPS.2024.3417518","DOIUrl":"https://doi.org/10.1109/TPS.2024.3417518","url":null,"abstract":"This article proposes and studies a new type of air-core compulsator (compensated pulse alternator) for electromagnetic railgun, which realizes the brushless rotating-field electric excitation based on an axially cascaded exciter. The characteristics of the nonrectifier and inverse connection sequence of rotor full pitch winding make it different from the previous cascaded synchronous generator or doubly fed generator. Therefore, it can not only ensure a brushless and slip-ring-free structure, but also the advantages of high rotational reliability and excitation efficiency. The operation principle and design method are given first, and then the key application performance indexes such as self-excitation process, output power, energy storage density, and energy conversion efficiency of a scaled prototype are analyzed in detail. The study results show that the output power density of the scaled prototype can reach 629 MW/m3, and pulse energy storage density can reach more than 1.58 MJ/m3, which verifies the feasibility of the novel compulsator in principle and implementation, as well as advantages over the traditional hybrid energy storage scheme (battery and capacitor) in volume and weight. The relevant conclusions have positive reference significance for the lightweight and miniaturization of pulse power supply (PPS) for electromagnetic energy equipment.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":"52 8","pages":"3310-3319"},"PeriodicalIF":1.3,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the Comparison of Lightning M-Component Classical and Modified Guided-Wave Models From the Aspects of Azimuthal Magnetic Fields 从方位磁场角度看雷电 M 分量经典导波模型与修正导波模型的比较

IF 1.3 1区化学

Accounts of Chemical Research Pub Date : 2024-10-24 DOI: 10.1109/TPS.2024.3434383

Quanxin Li;Guohua Yang;Jinliang He

{"title":"On the Comparison of Lightning M-Component Classical and Modified Guided-Wave Models From the Aspects of Azimuthal Magnetic Fields","authors":"Quanxin Li;Guohua Yang;Jinliang He","doi":"10.1109/TPS.2024.3434383","DOIUrl":"https://doi.org/10.1109/TPS.2024.3434383","url":null,"abstract":"The azimuthal magnetic fields of lightning M-components at various distance ranges were presented in this article. Two guided-wave models, namely, the classical guided-wave M-component model and the modified guided-wave M-component model, incorporating exponential current decay along the channel, were considered. Both fast and slow M-component current waveforms were utilized in the analysis. The study examined the magnetic field differences between the two models at close, intermediate, and far distance ranges. It was found that the discrepancies between the magnetic fields predicted by the classical guided-wave M-component model (CGM) and modified guided-wave M-component model (MGM) were relatively small at close distances. However, these differences became more noticeable at intermediate and far distances. It was observed that the amplitude differences were more prominent for the fast M-component compared with that of the slow M-component. The study also included a sensitivity analysis on the radiated magnetic fields, which likely explored the factors influencing the magnitude of the lightning M-component magnetic fields.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":"52 8","pages":"3185-3192"},"PeriodicalIF":1.3,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of Rail-Armature Coupling for the Enhanced Electromagnetic Pellet Injection in J-TEXT Tokamak 优化轨道-电枢耦合以增强 J-TEXT 托卡马克中的电磁弹丸注入

IF 1.3 1区化学

Accounts of Chemical Research Pub Date : 2024-10-24 DOI: 10.1109/TPS.2024.3473029

Zisen Nie;Zhongyong Chen;Wei Yan;Shengguo Xia;Yinlong Yu;Guinan Zou;Fanxi Liu;Yu Zhong;Jiangang Fang;Xun Zhou;Yuwei Sun;Yuan Sheng;You Li

{"title":"Optimization of Rail-Armature Coupling for the Enhanced Electromagnetic Pellet Injection in J-TEXT Tokamak","authors":"Zisen Nie;Zhongyong Chen;Wei Yan;Shengguo Xia;Yinlong Yu;Guinan Zou;Fanxi Liu;Yu Zhong;Jiangang Fang;Xun Zhou;Yuwei Sun;Yuan Sheng;You Li","doi":"10.1109/TPS.2024.3473029","DOIUrl":"https://doi.org/10.1109/TPS.2024.3473029","url":null,"abstract":"Major disruption poses a significant challenge to the safe operation of tokamaks, so disruption mitigation is a key problem to be solved in tokamak. Currently, the fundamental strategy of disruption mitigation involves actively injecting significant quantities of impurity gas or solids (such as neon, argon, deuterium, etc.) to generate sufficient radiation power for dissipating the plasma’s energy. The most commonly used disruption mitigation devices now are massive gas injection (MGI) and shattered pellet injection (SPI). However, The impurity injection rate is low, resulting in shallow deposits in the tokamak. Electromagnetic pellet injection (EMPI) is a relatively new generation of disruption mitigation system developed in J-TEXT Tokamak. The system is based on the electromagnetic rail run concept. It uses electromagnetic force to launch the armature with an impurity pellet. The EMPI has been tested several times and the speed of the pellet has broken through the speed of sound, far exceeding the launch speed of the traditional disruption mitigation system. This means impurity is deposited at a deeper location. However, the rail length of EMPI is too long and the rail ablation is serious, so it is a challenging problem to satisfy the tokamak installation space requirements. Therefore, based on the EMPI, an enhanced EMPI is designed, which increases the electromagnetic force by increasing the magnetic field intensity within the bore. This enables the rail length to be decreased to meet the specified condition. Building upon this foundation, various armature-rail coupling structures have been designed. These structures are subjected to COMSOL finite element simulation to determine which rail-armature interface exhibits minimal ablation, superior electrical contact, and maximal armature launch velocity. Subsequently, the optimal rail-armature coupling scheme is validated through an experimentation test.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":"52 8","pages":"3326-3334"},"PeriodicalIF":1.3,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural Design of Revolving Armature With Tail End Connection and Its Electromagnetic Launching Performance Verification 带尾端连接的旋转电枢结构设计及其电磁发射性能验证

IF 1.3 1区化学

Accounts of Chemical Research Pub Date : 2024-10-23 DOI: 10.1109/TPS.2024.3475750

Yong Liu;Tao Zhang;Kai Huang;Yanhui Chen;Wanying Wang;Wei Fan;Wei Guo

{"title":"Structural Design of Revolving Armature With Tail End Connection and Its Electromagnetic Launching Performance Verification","authors":"Yong Liu;Tao Zhang;Kai Huang;Yanhui Chen;Wanying Wang;Wei Fan;Wei Guo","doi":"10.1109/TPS.2024.3475750","DOIUrl":"https://doi.org/10.1109/TPS.2024.3475750","url":null,"abstract":"Electromagnetic-driven projectile spin launching technology is an important way to achieve high-precision firing in the railgun, but there is still a lack of sufficient research on the structural design of the tail-connected revolving armature and experimental verification of the spin launching performance. In this article, first, a structural design scheme of a revolving armature with a tail-end connection is established and compared with the conventional armature structural design scheme. Second, the finite element calculation model of interference assembly is adopted, and the influence law of the improved armature structure parameters on the initial mechanical performance is obtained. The theoretical calculation results show that the change of armature structural parameters has a great influence on the contact area and little influence on the maximum equivalent stress. The contact force decreases sharply with the increase of the interference position L2, throat radius r, and crack width \u0000<inline-formula> <tex-math>$c_w$ </tex-math></inline-formula>\u0000 of the tail, and increases sharply with the increase of the tail thickness t and interference amount \u0000<inline-formula> <tex-math>$Delta $ </tex-math></inline-formula>\u0000. Finally, the electromagnetic launching experiments with different launching energies are carried out on test projectiles with conventional armature and tail-connected armature. The experimental results show that the revolving armature with a tail-end connection can effectively improve the rotation speed, but it will also have some negative effects on the muzzle velocity and the contact state between the armature and the rail in the bore.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":"52 8","pages":"3335-3342"},"PeriodicalIF":1.3,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of a Graphene Based Terahertz Perfect Metamaterial Absorber With Multiple Sensing Performance 设计具有多重传感性能的石墨烯基太赫兹完美超材料吸收器

IF 2.1

ACS Applied Bio Materials Pub Date : 2024-10-23 DOI: 10.1109/TNANO.2024.3485758

Leila Shakiba;Mohammad Reza Salehi;Farzin Emami

引用次数: 0

Order Reduction and Rapid Calculation for Multimodule Linear Circuits 多模块线性电路的阶次减少和快速计算

IF 1.3 1区化学

Accounts of Chemical Research Pub Date : 2024-10-23 DOI: 10.1109/TPS.2024.3474682

Zhizhen Liu;Xinjie Yu;Zhen Li;Bei Li

{"title":"Order Reduction and Rapid Calculation for Multimodule Linear Circuits","authors":"Zhizhen Liu;Xinjie Yu;Zhen Li;Bei Li","doi":"10.1109/TPS.2024.3474682","DOIUrl":"https://doi.org/10.1109/TPS.2024.3474682","url":null,"abstract":"It is quite common to use multiple linear modules with asynchronous operation, e.g., the pulsed power supply (PPS) system for electromagnetic launch (EML), to provide higher power or the complex signal modulation function. Up to now, numerical simulation has been the only way to solve these problems but suffers from long running time and thus limits the large-scale optimization and control for these systems. This article proposes a rigorous port-equivalent order reduction method based on the Thevenin equivalence and short-circuit equivalence. This method can simplify the solution of multimodule linear circuits into the solution of multiple lower order circuits. If lower order circuits can be calculated analytically, the fully analytical calculation of the multimodule circuit can be realized. Otherwise, reducing the order can also greatly reduce the time of circuit simulation. On this basis, taking the meat grinder with a self-charged capacitor and thyristor (SECT) multimodule circuit as an example, its rapid and analytical calculation is demonstrated. Compared with the Simulink simulation, the results show that the method proposed in this article is about 50 times faster than the simulation, and the root-mean-square error (RMSE) is very small, which means that the calculation accuracy can well meet the requirements.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":"52 8","pages":"3343-3351"},"PeriodicalIF":1.3,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Manipulation of 2D and 3D Magnetic Solitons Under the Influence of DMI Gradients 在 DMI 梯度影响下操纵二维和三维磁孤子

IF 1.8 1区化学

Accounts of Chemical Research Pub Date : 2024-10-21 DOI: 10.1109/OJNANO.2024.3484568

Rayan Moukhader;Davi Rodrigues;Eleonora Raimondo;Vito Puliafito;Bruno Azzerboni;Mario Carpentieri;Abbass Hamadeh;Giovanni Finocchio;Riccardo Tomasello

{"title":"Manipulation of 2D and 3D Magnetic Solitons Under the Influence of DMI Gradients","authors":"Rayan Moukhader;Davi Rodrigues;Eleonora Raimondo;Vito Puliafito;Bruno Azzerboni;Mario Carpentieri;Abbass Hamadeh;Giovanni Finocchio;Riccardo Tomasello","doi":"10.1109/OJNANO.2024.3484568","DOIUrl":"https://doi.org/10.1109/OJNANO.2024.3484568","url":null,"abstract":"Magnetic solitons hold great promise for token-based computing applications due to their intrinsic properties, including small size, topological stability, ultra-low power manipulation, and potentially ultra-fast operation. In particular, they have been proposed as reliable memory units that enable the execution of various logic tasks with in-situ memory. A critical challenge remains the identification of optimal soliton and efficient manipulation techniques. Previous research has primarily focused on the manipulation of two-dimensional solitons, such as skyrmions, domain walls, and vortices, by applied currents. The discovery of novel methods to control magnetic parameters, such as the interfacial Dzyaloshinskii-Moriya interaction, through strain, temperature gradients, and applied voltages offers new avenues for energetically efficient manipulation of magnetic structures. In this work, we present a comprehensive study using numerical and analytical methods to investigate the stability and motion of various magnetic textures under the influence of DMI gradients. Our results show that Néel and Bloch-type skyrmions, as well as radial vortices, exhibit motion characterized by finite skyrmion Hall angles, while circular vortices undergo expulsion dynamics. This study provides a deeper and crucial understanding of the stability and gradient-driven dynamics of magnetic solitons, paving the way for the design of scalable spintronics token-based computing devices.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":"5 ","pages":"68-79"},"PeriodicalIF":1.8,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10726665","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0