IEEE Transactions on Plasma Science最新文献_第2页

Editorial Announcing the 2025 Transactions on Plasma Science Best Paper Award 宣布2025年等离子体科学学报最佳论文奖的社论

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-09-16 DOI: 10.1109/TPS.2025.3588547

Edl Schamiloglu

引用次数: 0

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IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-09-15 DOI: 10.1109/TPS.2025.3603438

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Special Issue on Pulsed Power Science and Technology 脉冲功率科学与技术专刊

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-09-15 DOI: 10.1109/TPS.2025.3606770

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Transactions on Plasma Science 等离子体科学汇刊

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-09-15 DOI: 10.1109/TPS.2025.3603442

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Special Issue on Plenary, Invited, Workshop on Pulsed Power for Fusion from PPPS-2025 来自PPPS-2025的聚变脉冲功率研讨会全体会议特刊

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-09-15 DOI: 10.1109/TPS.2025.3606772

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On Kink Modes and Low-n Kink β Limits in HL-2A Sawtooth Discharges HL-2A锯齿状放电的扭结模式和低n扭结β极限

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-09-09 DOI: 10.1109/TPS.2025.3604770

Yong Shen;Jiaqi Dong;Hongda He

{"title":"On Kink Modes and Low-n Kink β Limits in HL-2A Sawtooth Discharges","authors":"Yong Shen;Jiaqi Dong;Hongda He","doi":"10.1109/TPS.2025.3604770","DOIUrl":"https://doi.org/10.1109/TPS.2025.3604770","url":null,"abstract":"Kink mode is one of the most important macroinstabilities in sawtooth discharge. In this article, the nature of kink modes was investigated through a combination of HL-2A experiments and simulations. Multiple <bold>n (toroidal mode number) kink branches were found in HL-2A sawtooth discharges. The distinct roles of different <bold>n-kink modes in plasma instability were identified. The <bold>n = 1 mode is identified as the dominant kink mode. The mode structure shrinks toward the center with an increase in <bold>n value. The mode linear growth rate is not necessarily related to whether the mode dominates plasma. The weakening effect of the shorter wavelength and its higher internal localization partially offset the advantage of the higher <bold>n mode in the global plasma instability. In practice, multiple <bold>n-kink branches tend to be stable if <bold>n = 1 mode is stable. Among the low-<italic>n modes, the stability limits for <bold>n <inline-formula> <tex-math>$gt$ </tex-math></inline-formula> 1 modes would not be lower than <bold>n = 1 mode at <inline-formula> <tex-math>$mathbf {q}_{mathbf {0}}=mathbf {1.05}$ </tex-math></inline-formula> and its adjacent areas, and the stability limits of <bold>n = 1 and <bold>2 kink modes decrease with <inline-formula> <tex-math>$mathbf {q}_{mathbf {0}}$ </tex-math></inline-formula> and exhibit some linear relationships if a normally parabolic current density profile is considered, which hints for the determination of the operational <inline-formula> <tex-math>$boldsymbol {beta }$ </tex-math></inline-formula> for HL-2A sawtooth discharges.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"53 10","pages":"3129-3140"},"PeriodicalIF":1.5,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145290246","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}

引用次数: 0

Inverse Design Approach by Deep Learning for Thermally Modulated Graphene Supported Multi-Functional Bio-Sensor 基于深度学习的热调制石墨烯支撑多功能生物传感器逆设计方法

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-09-05 DOI: 10.1109/TPS.2025.3602713

Abhishek Kumar

{"title":"Inverse Design Approach by Deep Learning for Thermally Modulated Graphene Supported Multi-Functional Bio-Sensor","authors":"Abhishek Kumar","doi":"10.1109/TPS.2025.3602713","DOIUrl":"https://doi.org/10.1109/TPS.2025.3602713","url":null,"abstract":"An electrically and thermally tunable absorber is designed using graphene and vanadium dioxide (VO2). A monolayer graphene sheet positioned on top acts as a multinarrowband resonator, with its voltage tunability capability allowing for controlled responses. Increasing the chemical potential of graphene results in wideband responses achieved at lower frequencies. A VO2 layer is placed between the graphene and the back layer. At lower temperatures, VO2 operates as a dielectric spacer, enabling multiband resonance. Below 300 K, the device functions as an ultranarrow multiband absorber, demonstrating remarkable sensitivity (<italic>S) of 60 GHz/RIU, 60 GHz/RIU, and 210 GHz/RIU with quality factor (<italic>Q) 84, 38, and 68, respectively. Its biosensing capabilities are explored, particularly its proficiency in detecting malaria and glucose with high sensing performance. This innovative configuration substitutes conventional dielectric spacers and introduces thermal tunability. As the temperature increases, the conductivity of VO2 rises, transforming the device into a reflector.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"53 10","pages":"3187-3193"},"PeriodicalIF":1.5,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145290212","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}

引用次数: 0

Terahertz Band Traveling-Wave Tube Based on Folded-Waveguide Slow-Wave Structure With Multiple Sheet Beams 基于多片波束折叠波导慢波结构的太赫兹行波管

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-09-05 DOI: 10.1109/TPS.2025.3597344

Yanan Ma;Fengying Lu;Rui Zhang;Yong Wang;Suye Lü

{"title":"Terahertz Band Traveling-Wave Tube Based on Folded-Waveguide Slow-Wave Structure With Multiple Sheet Beams","authors":"Yanan Ma;Fengying Lu;Rui Zhang;Yong Wang;Suye Lü","doi":"10.1109/TPS.2025.3597344","DOIUrl":"https://doi.org/10.1109/TPS.2025.3597344","url":null,"abstract":"A novel multiple sheet beams (MSBs) slow-wave structure (SWS), the horizontal multiple sheet beams folded-waveguide SWS (HMSB-FW SWS), was proposed for terahertz (THz) traveling-wave tubes (TWTs). This design aims to enhance the output power and meet the increasing demand for high-frequency and high-power THz radiation sources used in various applications. By utilizing MSB, the HMSB-FW SWS aims to improve the interaction between the electron beam and the electromagnetic wave. Compared with a vertical multiple sheet beams FW-SWS (VMSB-FW SWS), the HMSB-FW SWS offers a higher interaction impedance, leading to enhanced output power and gain. Simulation results indicate that the proposed HMSB-FW TWT exhibits significant improvements by over two times compared with the VMSB-FW TWT in amplification performance. Based on simulation results, with a magnetic field of 0.6 T and driven by an input signal at a frequency of 230 GHz, a saturated power of 100 W was obtained with a gain of 23 dB, an electron efficiency of 10%, and a 3-dB bandwidth of 20 GHz. Due to the limited fabrication accuracy at THz band, the FW-SWS requires specific tolerance and manufacturing compatibility. A study on zero-drive oscillations was performed to assess the stability of the proposed MSB-FW TWT.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"53 10","pages":"3179-3186"},"PeriodicalIF":1.5,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145290253","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}

引用次数: 0

Electron-Beam Corkscrew Motion Through the Scorpius Injector 电子束螺旋运动通过天蝎座注入器

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-09-05 DOI: 10.1109/TPS.2025.3603453

Carl Ekdahl

引用次数: 0

Design and Simulation Investigations of Ultrawideband Metamaterial-Based Terahertz Absorber 超宽带超材料基太赫兹吸收器的设计与仿真研究

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-09-05 DOI: 10.1109/TPS.2025.3602494

Sahil Kumar;V. Sivavenkateswara Rao

{"title":"Design and Simulation Investigations of Ultrawideband Metamaterial-Based Terahertz Absorber","authors":"Sahil Kumar;V. Sivavenkateswara Rao","doi":"10.1109/TPS.2025.3602494","DOIUrl":"https://doi.org/10.1109/TPS.2025.3602494","url":null,"abstract":"A simple, ultrawideband metamaterial-based perfect absorber is proposed, featuring a novel unit cell composed of three vanadium dioxide (VO2) rings strategically interrupted by rectangular cut outs. The multilayer structure consists of tetrafluoroethylene (Teflon) positioned between VO2 and is backed by a gold (Au) ground plane, which acts as a reflective layer. The simulation results of the proposed unit cell predict that the absorption bandwidth of the proposed absorber is 4.93 terahertz (THz), spanning from 3.44 to 8.37 THz when VO2 is in the conducting (metallic) state. Within this band, the structure also demonstrates angular stability and near unity (perfect) absorption at 4 and 6 THz, making it highly suitable for applications such as THz sensing, imaging, and stealth applications. The fractional bandwidth (FBW) of the absorber is found to be 83.4%. The electric field distribution and surface current density result at frequencies, namely, 2.5, 4, 6, and 8.24 THz are presented. Moreover, the sensitivity studies of the proposed design are explored for several geometric parameter variations and conductivities of the VO2, and the potential reasons behind the respective performance are presented.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"53 10","pages":"3205-3211"},"PeriodicalIF":1.5,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145290241","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}

引用次数: 0