IEEE Transactions on Plasma Science最新文献_第4页

Simulation Research of Ultrawideband Terahertz Absorber Based on VO2 With Polarization Insensitivity and Wide Incidence Angle Characteristics 基于偏振不敏感和宽入射角特性的VO2超宽带太赫兹吸收体的仿真研究

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-06-06 DOI: 10.1109/TPS.2025.3575349

Huiming Huang;Meng Wang;Kangqiang Guo;Xingning Jia;Ruiqi Zhao;Guizhen Lu

{"title":"Simulation Research of Ultrawideband Terahertz Absorber Based on VO2 With Polarization Insensitivity and Wide Incidence Angle Characteristics","authors":"Huiming Huang;Meng Wang;Kangqiang Guo;Xingning Jia;Ruiqi Zhao;Guizhen Lu","doi":"10.1109/TPS.2025.3575349","DOIUrl":"https://doi.org/10.1109/TPS.2025.3575349","url":null,"abstract":"In this article, a tunable broadband terahertz (THz) absorber is presented. The structure contains patterned vanadium dioxide (VO2), patterned Aurum (Au), polydimethylsiloxane (PDMS), and Au substrate. The proposed absorber utilizes the phase transition property of VO2 to achieve dynamic absorption tuning. The numerical simulation results indicate that when the conductivity of VO2 reaches <inline-formula> <tex-math>$2times 10^{5}$ </tex-math></inline-formula> S/m, the absorber can obtain more than 90% absorptivity in the range of 4.8–9.3 THz. When the conductivity becomes 200 S/m, the absorptivity drops to less than 5%, indicating that the THz absorption possesses significant dynamic tunability. By analyzing the electric field distribution at different conductivities and combining with the concept of relative impedance, the physical mechanism of broadband absorption is explored preliminarily. Meanwhile, the proposed absorber has polarization insensitivity and wide incidence angle characteristics simultaneously. As a result, the research in this article has good prospects in the application fields of THz detection, modulation, switching, and so on.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"53 7","pages":"1673-1679"},"PeriodicalIF":1.3,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144624059","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

Steering-Shaped Multiband THz Absorber-Based Highly Sensitive Biofuel Sensor 转向型多波段太赫兹吸收器型高灵敏度生物燃料传感器

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-06-05 DOI: 10.1109/TPS.2025.3571709

Vikram Maurya;Sarthak Singhal

引用次数: 0

Angle-Modulated Thermal-Electrical and Brewster-Controlled Absorber for THz Shielding and Sensing 用于太赫兹屏蔽和传感的角度调制热电和布鲁斯特控制吸收器

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-06-05 DOI: 10.1109/TPS.2025.3571750

Priya Anuranjani;Gaurav Varshney

{"title":"Angle-Modulated Thermal-Electrical and Brewster-Controlled Absorber for THz Shielding and Sensing","authors":"Priya Anuranjani;Gaurav Varshney","doi":"10.1109/TPS.2025.3571750","DOIUrl":"https://doi.org/10.1109/TPS.2025.3571750","url":null,"abstract":"A hybrid of vanadium dioxide (VO2) and graphene resonators can be utilized for implementing a thermally, electrically, and Brewster-controlled ultrathin terahertz (THz) absorber. Thermally controlled resonance spectrum of VO2 resonator can be switched for high absorption over 2.4–5.6 THz and perfect reflection in its metallic to insulating phase, respectively. The graphene ring resonator provides a narrow absorption peak with full-width, half-maxima of 0.372 THz in the insulating phase of VO2 and remains electrically tunable. Moreover, the insulating phase of VO2 can enable the Brewster’s effect and an ultranarrow absorption peak with high quality factor >300 is generated to provide the dual-band response. This Brewster generated absorption peak can be tunable using the incident angle of TM-polarized wave. The absorber operation is governed by the destructive interference taking place in the dielectric spacer, which is validated using the theory of multiple reflection. The broadband absorber can provide the high shielding effectiveness (SE) of 200 dB, which can aid the THz electromagnetic (EM) shielding applications, and narrowband absorber can provide the high sensitivity of 0.315 THz/RIU during THz refractive index sensing.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"53 7","pages":"1646-1651"},"PeriodicalIF":1.3,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144624049","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

A Review of Terahertz Traveling Wave Tubes 太赫兹行波管研究进展

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-06-05 DOI: 10.1109/TPS.2025.3569837

Tieyan Zhang;Qipei Ban;Wenxin Liu;Fengying Lu;Zhihao Jin;Kedong Zhao;Sihan Lu;Zhiqiang Zhang;Zhaochuan Zhang;Zhuolong Cai;Wenxin Wu

{"title":"A Review of Terahertz Traveling Wave Tubes","authors":"Tieyan Zhang;Qipei Ban;Wenxin Liu;Fengying Lu;Zhihao Jin;Kedong Zhao;Sihan Lu;Zhiqiang Zhang;Zhaochuan Zhang;Zhuolong Cai;Wenxin Wu","doi":"10.1109/TPS.2025.3569837","DOIUrl":"https://doi.org/10.1109/TPS.2025.3569837","url":null,"abstract":"The terahertz traveling wave tube (TWT), a critical vacuum electronic device, exhibits advantages including wide bandwidth, high power, and superior efficiency. Its applications span high-resolution imaging, high-speed communication, and electronic countermeasures, among others. The operational principle relies on the continuous energy transfer from the electron beam to the electromagnetic wave via interaction within the slow wave structure (SWS), thereby amplifying the signal. The main structure of terahertz TWT is SWS, such as helix, coupling cavity, staggered double vane, folded waveguide (FW), sine waveguide and photonic crystal. Extensive research has been conducted on terahertz TWTs. This review systematically analyzes the characteristics of terahertz TWTs with various SWSs. Additionally, it highlights advancements in achieving high power and wide bandwidth over the past decade. Then several fabrication processes and applications of terahertz TWTs are also described. These insights provide a comprehensive foundation for advancing theoretical and experimental research on terahertz TWTs, thereby accelerating their practical deployment in terahertz technologies.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"53 7","pages":"1693-1702"},"PeriodicalIF":1.3,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11026823","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623878","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}

引用次数: 0

Effect of Nanosecond Pulse Parameters on Plasma Characteristics and Radical Concentrations in Water Cathodes 纳秒脉冲参数对水阴极等离子体特性和自由基浓度的影响

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-06-05 DOI: 10.1109/TPS.2025.3570988

Haorui Xue;Yang Li;Wenhao Gao;Qi Yuan;Yuchen Cheng;Weidong Ding

{"title":"Effect of Nanosecond Pulse Parameters on Plasma Characteristics and Radical Concentrations in Water Cathodes","authors":"Haorui Xue;Yang Li;Wenhao Gao;Qi Yuan;Yuchen Cheng;Weidong Ding","doi":"10.1109/TPS.2025.3570988","DOIUrl":"https://doi.org/10.1109/TPS.2025.3570988","url":null,"abstract":"Nanosecond pulsed plasma is a potential technology for wastewater treatment due to its high efficiency in driving plasma. In this article, a miniature needle water cathodes discharge structure based on the printed circuit board (PCB) technology is designed to achieve efficient plasma generation. The development process of plasma under nanosecond pulses was investigated, and the effects of pulse parameters on radical concentration, plasma temperature, and electron density were analyzed. In short-gap water cathode configurations, the initial tens of nanoseconds of the pulse dominate the optical signals. Initial secondary streamers span the entire gas gap. The absence of the <inline-formula> <tex-math>$mathrm{H}_{alpha }$ </tex-math></inline-formula> emission and the delayed appearance of OH(<italic>A-<italic>X) indicate that OH is primarily generated through molecular reactions rather than electron impact dissociation. Short pulse widths and short rise times facilitate efficient generation of radical concentrations and electron density. Increasing the voltage amplitude and repetition frequency enhances the inhomogeneity of the electron density but reduces the mean electron density due to plasma volume expansion. High-voltage amplitudes also elevate radical concentrations and plasma temperature. The increase of repetition frequency promotes energy deposition in the background gas, which raises the plasma temperature, leading to a stronger discharge and an increase in the yield of radicals.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"53 7","pages":"1507-1517"},"PeriodicalIF":1.3,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623992","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

Revisiting Spiral Generator Operation 回顾螺旋发电机的运行

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-06-05 DOI: 10.1109/TPS.2025.3573101

Yan Zeltser;Levi Schächter;Yury P. Bliokh;Yakov E. Krasik

{"title":"Revisiting Spiral Generator Operation","authors":"Yan Zeltser;Levi Schächter;Yury P. Bliokh;Yakov E. Krasik","doi":"10.1109/TPS.2025.3573101","DOIUrl":"https://doi.org/10.1109/TPS.2025.3573101","url":null,"abstract":"A spiral generator (SG) is a pulsed power source introduced in the middle of the previous century as a generator whose operation is based on transient processes in transmission strip lines, a so-called “vector inversion generator” (VIG). SGs are favored for their simplicity and are widely used in research and applications that require high-voltage (HV) pulses of several kilovolt and pulse duration of <inline-formula> <tex-math>$10^{-9}$ </tex-math></inline-formula>–<inline-formula> <tex-math>$10^{-7}$ </tex-math></inline-formula> s. In this study, we present the results of experiments on three different SGs of varying sizes and geometries, loads, spark gap triggering switches, and with or without ferrites. The output voltage, switch current, magnetic field, and other various measurable quantities are monitored. It is found that the output voltage and magnetic field inside and outside the SG appear virtually simultaneously with the discharge current through the primary switch. Based on these observations and on input and output impedance measurements, a model of the SG as a transformer is derived and tested against output voltage and switch current waveforms obtained in experiments. The proposed model shows good agreement with the experimental results. Finally, analytic expressions for the circuit elements of the model are devised, and design considerations of the SG for maximal voltage multiplication are shown.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"53 7","pages":"1518-1530"},"PeriodicalIF":1.3,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623987","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

Comparison Between Electrostatic PP and PIC Simulations of Electron Bunch Expansion 静电PP和PIC电子束膨胀模拟的比较

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-06-05 DOI: 10.1109/TPS.2025.3574713

Yanan Zhang;Xiaochun Ma;Hui Liu;Yinjian Zhao

引用次数: 0

Characterization of the Ba(1–x)Sr(x)(Zr0.2Ti0.8)O3 Ceramic as a Nonlinear Capacitor for LC-Based Nonlinear Transmission Lines Ba(1-x)Sr(x)(Zr0.2Ti0.8)O3陶瓷作为lc基非线性传输线非线性电容的表征

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-06-05 DOI: 10.1109/TPS.2025.3564155

Rangel G. Aredes;Jose O. Rossi;Lauro P. Silva Neto;Gustavo N. de Lima;Eduardo Antonelli;Joaquim J. Barroso;Edl Schamiloglu

{"title":"Characterization of the Ba(1–x)Sr(x)(Zr0.2Ti0.8)O3 Ceramic as a Nonlinear Capacitor for LC-Based Nonlinear Transmission Lines","authors":"Rangel G. Aredes;Jose O. Rossi;Lauro P. Silva Neto;Gustavo N. de Lima;Eduardo Antonelli;Joaquim J. Barroso;Edl Schamiloglu","doi":"10.1109/TPS.2025.3564155","DOIUrl":"https://doi.org/10.1109/TPS.2025.3564155","url":null,"abstract":"Ferroelectric ceramics can be used as nonlinear capacitors in nonlinear transmission lines (NLTLs) to generate radio frequency with applications in defense systems and pulsed radars. Their primary feature is their nonlinear behavior, which is the variation in capacitance with temperature and electric field. One crucial ceramic material for these uses is barium titanate (BT). The ceramic paraelectric phase, however, is above the Curie temperature of <inline-formula> <tex-math>$120~^{circ }$ </tex-math></inline-formula>C in its pure form. We synthesized and studied the <inline-formula> <tex-math>${mathrm {Ba}}_{(1 -x)}$ </tex-math></inline-formula><inline-formula> <tex-math>${mathrm {Sr}}_{(x)}$ </tex-math></inline-formula>(Zr0.2Ti0.8)O3 ceramic as a nonlinear element by downshifting the paraelectric to ferroelectric phase transition close to ambient temperature to enhance the nonlinear characteristics. By varying the frequency and applied electric field, we examined the capacitance behavior of this material. Additionally, we discovered that this ceramic composite’s paraelectric phase transition occurred at a concentration of <inline-formula> <tex-math>${x} =0.5$ </tex-math></inline-formula>% strontium. To illustrate the RF generation, we constructed and tested a nonlinear LC circuit employing ten ceramic samples that contained 0.5% strontium as nonlinear capacitors. Finally, we estimated the RF frequency generated to be 5.4 MHz by deriving expressions for the propagating solitary-wave solution, which agrees with the experimentally determined value.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"53 7","pages":"1827-1835"},"PeriodicalIF":1.3,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623882","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

Thermal Decomposition of Polyethylene for Carbon Nanomaterials Synthesis via Atmospheric-Pressure Microwave Plasmas 常压微波等离子体热分解聚乙烯制备纳米碳材料的研究

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-06-02 DOI: 10.1109/TPS.2025.3562889

Xinpeng Bai;Wenhui Ma;Ziyao Jie;Nan Luo;Guixin Zhang;Tian-Yu Wang

{"title":"Thermal Decomposition of Polyethylene for Carbon Nanomaterials Synthesis via Atmospheric-Pressure Microwave Plasmas","authors":"Xinpeng Bai;Wenhui Ma;Ziyao Jie;Nan Luo;Guixin Zhang;Tian-Yu Wang","doi":"10.1109/TPS.2025.3562889","DOIUrl":"https://doi.org/10.1109/TPS.2025.3562889","url":null,"abstract":"Polyethylene (PE) constitutes a significant portion of plastic waste, representing approximately 30% of nondegradable plastics. Efficiently utilizing waste PE is essential to address plastic pollution. This study proposed the thermal decomposition of powdered PE using atmospheric microwave plasmas, with processing time under 1 s. Gas temperature was measured in the plasma using optical emission spectroscopy (OES) method as 4780 K. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were utilized to examine the surface morphology of the products, which indicated that the average size of the nanoparticles produced was <inline-formula> <tex-math>$29~pm ~0.58$ </tex-math></inline-formula> nm, with the majority of particles having a diameter below 50 nm. The X-ray diffraction (XRD) and Raman spectroscopy confirmed the formation of few-layer graphene within the reaction products (<inline-formula> <tex-math>$leq 5$ </tex-math></inline-formula> layers). Based on the characterization results, the reaction mechanism was subsequently analyzed. The experimental results indicate that microwave plasma thermal decomposition can convert PE solid material into carbon nanomaterials under atmospheric pressure in an ultrafast, one-step process, offering new possibilities for large-scale industrial preparation of graphene materials and PE waste treatment.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"53 7","pages":"1738-1746"},"PeriodicalIF":1.3,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144624050","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 Acceleration in Ionizing Gas by Self-Divergent Amplitude-Modulated Laser Pulses 自发散调幅激光脉冲在电离气体中的电子加速

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2025-06-02 DOI: 10.1109/TPS.2025.3571548

Ravina;Devki Nandan Gupta;Hyyong Suk;Jyotsna Sharma

{"title":"Electron Acceleration in Ionizing Gas by Self-Divergent Amplitude-Modulated Laser Pulses","authors":"Ravina;Devki Nandan Gupta;Hyyong Suk;Jyotsna Sharma","doi":"10.1109/TPS.2025.3571548","DOIUrl":"https://doi.org/10.1109/TPS.2025.3571548","url":null,"abstract":"We investigate electron acceleration driven by a self-diverging laser filament propagating through a tunnel-ionizing gas. When a high-intensity, amplitude-modulated laser interacts with the gas, it ionizes the medium and generates plasma. Due to local plasma density gradients, the laser filament diverges as it propagates, altering the dynamics of electron acceleration. Electrons can gain energy from the rising edge of the laser pulse, while the subsequent divergence of the laser helps mitigate deceleration by reducing the overlap between the trailing fields and the electron trajectory. Consequently, a significant portion of the acquired energy can be retained. To optimize the acceleration process, the spatial alignment between the laser pulse peak and the electron position is crucial. We develop a theoretical model to describe the divergence behavior of the laser filament and its impact on electron dynamics. Using this model, we estimate the achievable electron energy gain and derive scaling laws to guide the optimization and control of the acceleration process. This work suggests a novel mechanism for enhancing electron energy gain through the interaction of amplitude-modulated laser filaments with gas jets.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"53 7","pages":"1465-1472"},"PeriodicalIF":1.3,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623996","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