IEEE Transactions on Plasma Science最新文献_第10页

Performance Enhancement of EAD Thrusters With Nonuniform Emitters Array 非均匀发射阵列对EAD推进器性能的增强

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-12-09 DOI: 10.1109/TPS.2024.3505980

Davide Usuelli;Raffaello Terenzi;Stefano Trovato;Marco Belan

{"title":"Performance Enhancement of EAD Thrusters With Nonuniform Emitters Array","authors":"Davide Usuelli;Raffaello Terenzi;Stefano Trovato;Marco Belan","doi":"10.1109/TPS.2024.3505980","DOIUrl":"https://doi.org/10.1109/TPS.2024.3505980","url":null,"abstract":"This work presents an experimental campaign to optimize the performance of electro-aerodynamic (EAD) thrusters through nonuniform emitter arrangements. The study examines the impact of emitter configurations on thrust and thrust-to-power coefficients <inline-formula> <tex-math>$boldsymbol {C}_{boldsymbol {T}}$ </tex-math></inline-formula> and <inline-formula> <tex-math>$boldsymbol {C}_{boldsymbol {TP}}$ </tex-math></inline-formula>. Different emitter arrangements, including collinear and staggered arrays, are tested using thrust, electrical, and velocity measurements as diagnostics. The tests are parametrically performed for different sizes (chords) of the collector electrodes. Results reveal that nonuniform emitter configurations outperform standard arrays, in particular, with short chord collectors, widely spaced apart. An optimal configuration for <inline-formula> <tex-math>$boldsymbol {C}_{boldsymbol {T}}$ </tex-math></inline-formula> is identified among the staggered ones. In addition, droplet collectors demonstrate competitive performance compared to airfoil collectors.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 11","pages":"5414-5421"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10785549","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142993820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

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IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-12-09 DOI: 10.1109/TPS.2024.3506233

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IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-12-09 DOI: 10.1109/TPS.2024.3506425

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IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-12-09 DOI: 10.1109/TPS.2024.3504907

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IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-12-09 DOI: 10.1109/TPS.2024.3506423

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Guest Editorial IEEE TPS—SOFE 2023 Special Issue IEEE tps - sof2023特刊客座编辑

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-12-09 DOI: 10.1109/TPS.2024.3456849

Rhian Chapman

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Characterization of Plasma Sheath Distribution and Electromagnetic Transport in Hypersonic Vehicles Under Multieffects Coupling 多效应耦合下高超声速飞行器等离子体鞘层分布与电磁输运特性研究

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-12-09 DOI: 10.1109/TPS.2024.3503716

Li YuXin;Ma Ping;Xiong Zhengwei;Gao ZhiPeng;Tian DeYang

{"title":"Characterization of Plasma Sheath Distribution and Electromagnetic Transport in Hypersonic Vehicles Under Multieffects Coupling","authors":"Li YuXin;Ma Ping;Xiong Zhengwei;Gao ZhiPeng;Tian DeYang","doi":"10.1109/TPS.2024.3503716","DOIUrl":"https://doi.org/10.1109/TPS.2024.3503716","url":null,"abstract":"When a hypersonic vehicle flies at high speed in near space, the distribution of key characteristic parameters of the plasma sheath covering the vehicle shows significant changes due to the influence of high-temperature gas effect and wing turbulence interference, resulting in more complicated electromagnetic (EM) transmission characteristics of the target. To more accurately study the distribution characteristics of the plasma sheath and its EM transmission properties of hypersonic vehicles under the coupling of a chemical reaction and near-wall turbulence. The computational fluid dynamics (CFD) method was used to solve the multicomponent 3-D Navier-Stokes equations with chemical reaction source terms, and the Spalart-Allmaras (S-A) turbulence model was introduced to simulate near-wall flow, numerical simulations were performed for different altitudes and velocities. The focus was on researching the distribution characteristics and evolution laws of electron density, particle mass fractions, and EM transmission in the flow field. The results show that considering the near-wall disturbance makes the peak electron density far away from the wall; the air undergoes a violent dissociation-complexity reaction after the excitation wave, the free electrons mainly originate from the contributions of oxygen and nitrogen, and the difference mainly depends on the degree of decomposition of the nitrogen. Finally, the high electron density decreases the transmission coefficient of the EM wave, increases the reflection coefficient, and increases the degree of the EM wave attenuation, and the turbulent near-wall disturbance makes the thickness of the sheath increase, which further aggravates the EM wave attenuation. This study can deepen the understanding of the EM environment of the hypersonic vehicle, and can also provide a reference for the design of the hypersonic vehicle.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 11","pages":"5327-5334"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142993433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

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Neural Network-Based Defect Detection on Tomography Images for Quality Control of Inertial Fusion Capsules

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-12-09 DOI: 10.1109/TPS.2024.3505157

D. A. Orozco;M. C. Quinn;B. S. Sammuli;A. Allen;K. Boehm;M. Farrell;C. Kong;M. Ratledge;K. Sequoia

{"title":"Neural Network-Based Defect Detection on Tomography Images for Quality Control of Inertial Fusion Capsules","authors":"D. A. Orozco;M. C. Quinn;B. S. Sammuli;A. Allen;K. Boehm;M. Farrell;C. Kong;M. Ratledge;K. Sequoia","doi":"10.1109/TPS.2024.3505157","DOIUrl":"https://doi.org/10.1109/TPS.2024.3505157","url":null,"abstract":"Recent headlines of record-breaking fusion energy yields using inertial confinement have led to a growing interest in the metrology processes used to inspect the high-density carbon (HDC) capsules that have achieved these yields. To ensure the highest quality HDC shells, the tomographic reconstructions are reviewed for defects to satisfy a certain standard of quality. Historically, a human expert would visually analyze HDC tomography data searching for defects, which is very time-consuming and labor-intensive. While classical computer vision (CCV) methods have also been employed, machine-learning methods have demonstrated the ability to analyze vast amounts of data at high speeds and more robustly identify patterns and anomalies that may indicate the presence of previously undetectable defects. Presented here is our novel process, ShellNet, that has been developed to automate this defect detection task on HDC shells using convolutional neural networks (CNNs); the challenges and limitations of this approach are also discussed. A machine-learning model trained on thousands of expert-labeled defects and tomography images, utilizing a custom labeling tool, is now being used in production. Case studies are presented, demonstrating the effectiveness of machine learning in this application, as well as outlines for future research in this area. Overall, machine learning has been shown to be an effective method in enhancing the quality-based selection process of HDC shells, even exceeding the recall performance of human-labeled data. These improvements promise to lead to overall improved reliability of HDC materials in inertial fusion technology.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"53 1","pages":"167-173"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

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Electron Beam Welding of the HTS Current Lead for the ITER Feeder ITER给料器高温超导引线的电子束焊接

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-12-09 DOI: 10.1109/TPS.2024.3495636

Jianguo Ma;Jia Tao;Zhenfei Liu;Chen Liu;Liming Peng;Wei Wen;Le Yang;Xiaowei Xia;Jiefeng Wu;Rui Wang;Zhihong Liu

{"title":"Electron Beam Welding of the HTS Current Lead for the ITER Feeder","authors":"Jianguo Ma;Jia Tao;Zhenfei Liu;Chen Liu;Liming Peng;Wei Wen;Le Yang;Xiaowei Xia;Jiefeng Wu;Rui Wang;Zhihong Liu","doi":"10.1109/TPS.2024.3495636","DOIUrl":"https://doi.org/10.1109/TPS.2024.3495636","url":null,"abstract":"The high-temperature superconducting (HTS) current lead is one of the core components of the International Thermonuclear Experimental Reactor (ITER) magnet feeder system. Due to high-quality requirements, electron beam welding (EBW) was chosen to weld the room temperature terminal, the finned heat exchanger, and the HTS segment. The short mock-up was created to assess the performance of the welded joints. The analysis of macroscopic morphology and microstructure indicates that the welded joint of the short mock-up appeared to be free of visible defects. The tensile strength of the welded samples ranges from 185 to 208 MPa, which is higher than the design requirement of 150 MPa. The side bending test also shows no open discontinuity of the samples. Additionally, the thermal shock test was carried out. The dye penetrant test and the ultrasonic test after thermal shock shows that there are no obvious defects inside or on the surface of the weld seam. Furthermore, the leakage rate of the welded sample measured in the helium tightness leak test was <inline-formula> <tex-math>$2.2times 10^{-10}$ </tex-math></inline-formula>Pa<inline-formula> <tex-math>$cdot $ </tex-math></inline-formula>m3/s, indicating no cracks detected in the joints in the joints. The same parameters were also used for the welding of the long mock-up equipped with fins. The maximum temperature during the welding process does not go over the prescribed limit. The actual HTS current lead was welded, and its performance was evaluated, based on the welding experiments of mock-ups. The welding quality of the HTS current lead was confirmed by all test results.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 11","pages":"5451-5456"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142993770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

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Guest Editorial Special Issue on Pulsed Power Science and Technology 脉冲功率科学与技术》特刊客座编辑

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-12-09 DOI: 10.1109/TPS.2024.3495352

Jacob Stephens;Tom Huiskamp;Weihua Jiang;Chunqi Jiang;Ravi Joshi

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