IEEE Transactions on Plasma Science最新文献_第7页

Bandwidth Enhancement of Extended Interaction Klystron by Ridge-Loaded Extended Interaction Cavity 脊载扩展相互作用腔增强扩展相互作用速调管的带宽

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-12-03 DOI: 10.1109/TPS.2024.3499351

Vemula Bhanu Naidu;Dipanjan Gope;Subrata Kumar Datta

引用次数: 0

Collected Current by a Double Langmuir Probe Setup With Plasma Flow 等离子体流双朗缪尔探针采集电流

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-12-03 DOI: 10.1109/TPS.2024.3501310

Chun-Sung Jao;Wojciech J. Miloch;Yohei Miyake

{"title":"Collected Current by a Double Langmuir Probe Setup With Plasma Flow","authors":"Chun-Sung Jao;Wojciech J. Miloch;Yohei Miyake","doi":"10.1109/TPS.2024.3501310","DOIUrl":"https://doi.org/10.1109/TPS.2024.3501310","url":null,"abstract":"The multineedle Langmuir probe (m-NLP) instrument, consisting of two or more fixed-bias cylindrical Langmuir probes, is designed to enhance data resolution, particularly for in situ measurement in space missions. However, like other spacecraft and instruments used in space missions, these probes may interact with the surrounding plasma, potentially leading to errors in plasma measurements. In this article, we investigate the interaction between a double Langmuir probe setup and plasma flow, specifically focusing on how the collected current on the probes is affected by the electric bias and varying distances between the probes. Results from Particle-in-Cell (PIC) simulations show that with a front probe and a rear probe aligned along the plasma flow, not only may the rear probe’s collected current be affected, but the entire system may also experience significant influences if the distance between probes is short. In particular, if both probes are positively biased, as in the m-NLP instrument, they will not significantly influence each other’s measurements if the distance between them is longer than 30 Debye lengths. We also employ test particle simulations to further illustrate the interaction between the double Langmuir probe system and its surrounding plasma.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 10","pages":"5222-5233"},"PeriodicalIF":1.3,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10776030","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890225","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

Measurement of the Electron Density of a Wind-Tunnel Plasma Using a Double Flush-Mounted Probe 用双探头测量风洞等离子体的电子密度

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-11-27 DOI: 10.1109/TPS.2024.3499932

Pengcheng Yu;Yu Liu;Xiangqun Liu;Jiuhou Lei

引用次数: 0

Exploring Wide Working Coefficient of Trigatron Gas Switches: A Comparative Study With Different Trigger Structures 探索三管气体开关的宽工作系数：不同触发结构的比较研究

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-11-26 DOI: 10.1109/TPS.2024.3496499

Xiaoqian Zhang;Haojie Cao;Li Chen;Sitong Tian

{"title":"Exploring Wide Working Coefficient of Trigatron Gas Switches: A Comparative Study With Different Trigger Structures","authors":"Xiaoqian Zhang;Haojie Cao;Li Chen;Sitong Tian","doi":"10.1109/TPS.2024.3496499","DOIUrl":"https://doi.org/10.1109/TPS.2024.3496499","url":null,"abstract":"Reducing breakdown delay and jitter, and broadening the working voltage range of gas switches have been paramount challenges in pulse switch research. This study centers on trigger methods of trigatron gas switch, designing and testing three trigger structures—conventional, microprotrusion, and microplasma jet—under various conditions. Furthermore, synchronization experiments were conducted and compared under different trigger structures. The experimental results showed that the trigatron switch exhibits fast and slow breakdown modes with the conventional trigger structure and both the microprotrusion and microplasma jet trigger structures can reduce the breakdown delay and jitter by creating strong electric field distortion and providing initial electrons. The microprotrusion structure enables the switch to operate stably at a working coefficient higher than 50%, with a breakdown delay and jitter as low as 76.44 and 1.37 ns, while the microplasma jet structure enables the switch to operate at a working coefficient as low as 40%, with a breakdown delay and jitter of 78.15 and 5.83 ns, respectively. Compared with the microprotrusion structure, the microplasma jet trigger structure can achieve a lower working coefficient and performs excellently in synchronization experiments.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 10","pages":"5256-5265"},"PeriodicalIF":1.3,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890222","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

Errata to “Particle-in-Cell (PIC) Simulations of A6 “Classic” “1.58/2.11/4.11” Geometry Relativistic or High-Voltage Magnetron With Radial Output of Microwave Power: A Historical Overview From Personal Experience” “A6“经典”“1.58/2.11/4.11”“具有微波功率径向输出的几何相对论或高压磁控管：从个人经验的历史概述”的粒子池（PIC）模拟的校误

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-11-26 DOI: 10.1109/TPS.2024.3501679

Andrey D. Andreev

引用次数: 0

Rice Seed Germination Improvement by Atmospheric Pressure Plasma Surface Modification With Water Buffer 常压等离子体表面水缓冲改性提高水稻种子萌发率

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-11-26 DOI: 10.1109/TPS.2024.3497133

Pin-Yuan Lai;Yuan-Tai Lai;Sheng-Yu Hsu;Po-Yu Chen;Jenq-Gong Duh

{"title":"Rice Seed Germination Improvement by Atmospheric Pressure Plasma Surface Modification With Water Buffer","authors":"Pin-Yuan Lai;Yuan-Tai Lai;Sheng-Yu Hsu;Po-Yu Chen;Jenq-Gong Duh","doi":"10.1109/TPS.2024.3497133","DOIUrl":"https://doi.org/10.1109/TPS.2024.3497133","url":null,"abstract":"Atmospheric pressure plasma (APP) treatment improves seed germination by introducing functional groups or etching to change its surface chemical characteristics. This study focuses on improving rice surface properties and reveals that water acting as a buffer plays a key role in APP treatment for the enhancement of seed germination. After a 150-s water buffer APP treatment, the germination percentage of rice seeds increased from 45% to 84% compared with the control group. This improvement can be attributed to the enrichment of surface polar functional groups resulting from the plasma treatment. Surface energy calculations revealed a remarkable increase in the polar component, leading to a substantial reduction in the water contact angle (WCA) from 105° to 40°. This indicates a significant enhancement in surface wettability, rendering it more hydrophilic. Consequently, water uptake from the seed surface also significantly increased. Moreover, X-ray photoelectron spectroscopy (XPS) showed that polar −NO functional groups were enhanced on the seed surface treated by APP with water buffer. The −NO functional groups were formed through a surface reaction between oxygen-excited species OH\u0000<inline-formula> <tex-math>$^{ast }$ </tex-math></inline-formula>\u0000 and N\u0000<inline-formula> <tex-math>$_{2}^{+}$ </tex-math></inline-formula>\u0000 ions or N\u0000<inline-formula> <tex-math>$_{2}^{ast }$ </tex-math></inline-formula>\u0000 species on the seed surface, which can improve the wettability and provide additional nutrition to seed germination. Consequently, APP seed treatment with water buffer can potentially facilitate seed germination.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 10","pages":"5184-5192"},"PeriodicalIF":1.3,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890138","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

The Final Design of the Plasma–Material Interaction Chamber for the Material Plasma Exposure eXperiment 材料等离子体暴露实验等离子体-材料相互作用室的最终设计

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-11-25 DOI: 10.1109/TPS.2024.3492816

Adam M. Aaron;G. Ted Boyd;Aravind Shanmugasundaram;Vivek Rao;Jonathan Perry;David Irick;Theodore M. Biewer;M. Aftab Hussain

{"title":"The Final Design of the Plasma–Material Interaction Chamber for the Material Plasma Exposure eXperiment","authors":"Adam M. Aaron;G. Ted Boyd;Aravind Shanmugasundaram;Vivek Rao;Jonathan Perry;David Irick;Theodore M. Biewer;M. Aftab Hussain","doi":"10.1109/TPS.2024.3492816","DOIUrl":"https://doi.org/10.1109/TPS.2024.3492816","url":null,"abstract":"The Material Plasma Exposure eXperiment (MPEX) is a steady-state linear plasma device designed to expose neutron-irradiated materials to fusion divertor prototypic plasma conditions to perform plasma-material interaction (PMI) studies. The MPEX device will be capable of ion fluxes of 1025 m−2s−1, power fluxes up to 40 MW/m2, ion fluences up to 1031 m−2, and operation at steady state for up to 106 s with magnetic fields up to 2.5 T. PMIs occur when the plasma directly impinges upon a surface. In the case of MPEX, this occurs primarily at the MPEX target. Observation of interaction using a variety of instruments is required. A PMI chamber was designed to enable these observations using currently envisioned diagnostics and to accommodate future instruments. The design includes 59 plasma-facing ports, 10 of which explicitly point at the target, and an additional 10 ports that can be used to assess the vacuum space in the chamber. The entire vacuum chamber is water-cooled and will experience sustained heat from plasma radiated power, microwaves, and neutral gas thermal loads. Because of the method of fabrication, this chamber has undergone significant manufacturability testing. The chamber includes provisions for chamber, plasma, and target diagnostics such as a residual gas analyzer, Thomson scattering lasers, and both visible and IR cameras. The design effort included operational testing of the autocoupler to ensure vacuum integrity and included machining and welding studies to verify that the tolerances required by the diagnostics could be held. Provisions have also been included to eventually accommodate a water-cooled target dump, an irradiated sample recovery module, and any other hardware needed to support future target designs and diagnostics.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 9","pages":"4103-4107"},"PeriodicalIF":1.3,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142797988","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

Design of a Retarding Field Energy Analyzer for the Large Plasma Device 大型等离子体装置减速场能量分析仪的设计

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-11-21 DOI: 10.1109/TPS.2024.3492696

Shawn Wenjie Tang;Walter Gekelman

{"title":"Design of a Retarding Field Energy Analyzer for the Large Plasma Device","authors":"Shawn Wenjie Tang;Walter Gekelman","doi":"10.1109/TPS.2024.3492696","DOIUrl":"https://doi.org/10.1109/TPS.2024.3492696","url":null,"abstract":"This article details the construction of a retarding field energy analyzer (RFEA) designed to measure the ion energy distribution function (IEDF) in a moderately dense laboratory plasma, such as that produced in the Large Plasma Device (LAPD). The RFEA was specifically developed to study ion acceleration in a magnetic reconnection experiment involving two kink-unstable flux ropes. It features four independently biasable grids, an electrically and thermally insulating exterior, a mesh grid stack as the entrance grid to collect more current, a solder-less design for easy assembly, and is constructed with readily available off-the-shelf materials for quick turnaround time. In this experiment, the RFEA demonstrated continuous operation for several days under LAPD conditions. It measured low-energy thermal ions with energies below 20 eV and observed field-aligned ion beams with energies between 9 and 15 eV near the reconnection region between the two ropes. For brevity, a detailed analysis of the ion beam and supporting 3-D gyrokinetic simulations are presented in a related manuscript [Tang et al., Phys. Plasmas 30, 082104 (2023)]. Ion temperature measurements of thermal ions within the flux ropes from the RFEA were consistent with those inferred from the spectroscopy of Doppler-broadened helium II spectral lines (320.3 nm).","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 10","pages":"5205-5215"},"PeriodicalIF":1.3,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890137","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

Simulation Design of a Ka-Band Helically Corrugated Waveguide Gyro-TWA Based on Axis-Encircling Electron Beam 基于绕轴电子束的ka波段螺旋波纹波导陀螺- twa仿真设计

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-11-19 DOI: 10.1109/TPS.2024.3495986

Ruiqi Lu;Qiao Liu;Qixiang Zhao;Jialang Ling;Chaojun Lei;Dongshuo Gao;Xu Zeng;E’Feng Wang;Jinjun Feng

{"title":"Simulation Design of a Ka-Band Helically Corrugated Waveguide Gyro-TWA Based on Axis-Encircling Electron Beam","authors":"Ruiqi Lu;Qiao Liu;Qixiang Zhao;Jialang Ling;Chaojun Lei;Dongshuo Gao;Xu Zeng;E’Feng Wang;Jinjun Feng","doi":"10.1109/TPS.2024.3495986","DOIUrl":"https://doi.org/10.1109/TPS.2024.3495986","url":null,"abstract":"Gyrotron traveling wave amplifiers (Gyro-TWA) have both the characteristics of high power and broadband, which have wide application prospects in many important military fields, such as millimeter wave detection, high-resolution imaging radar, electronic countermeasures, and so on. The gyro-TWA based on axis encircling electron beam can stably operate at high-order harmonic state, reducing the operating magnetic field linearly proportional with the harmonic number and even achieving superconducting free operation. It can improve the flexibility and maneuverability of gyro-TWA. In this article, a Ka-band second-harmonic gyro-TWA with an interaction circuit of helically corrugated waveguide (HCW) is designed. The simulation results indicate that the gyro-TWT driven by a 75-kV, 7-A axis-encircling electron beam can achieve about 160-kW maximum power with a saturation gain of 29 dB, an efficiency of 30.48%, and a bandwidth of 4 GHz from 27 to 31 GHz. Meanwhile, the design details of the circular polarizer and input coupler are reported.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 10","pages":"5173-5178"},"PeriodicalIF":1.3,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890231","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

Investigation on an X-Band Relativistic Backward Wave Oscillator Driven by a Dual-Exponential Voltage Pulse 双指数电压脉冲驱动的x波段相对论后向波振荡器研究

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-11-19 DOI: 10.1109/TPS.2024.3496908

Ying Cheng;Weihao Liu;Zhengyu Huang;Shaobin Liu;Shangchen Fu

{"title":"Investigation on an X-Band Relativistic Backward Wave Oscillator Driven by a Dual-Exponential Voltage Pulse","authors":"Ying Cheng;Weihao Liu;Zhengyu Huang;Shaobin Liu;Shangchen Fu","doi":"10.1109/TPS.2024.3496908","DOIUrl":"https://doi.org/10.1109/TPS.2024.3496908","url":null,"abstract":"Diminishing the dimensions and weight of high-power microwave (HPM) sources at the gigawatt level holds paramount significance in numerous pragmatic applications. Existing HPM sources typically necessitate a precisely rectangular driving pulse, mandating intricate pulse-forming apparatus for the driving source. In this context, our proposal aims to streamline the driving source and alleviate its weight by advocating the utilization of a readily available dual-exponential voltage pulse to drive an X-band relativistic backward-wave oscillator (RBWO). Through detailed particle-in-cell (PIC) simulations, we examine the operational efficiencies of an RBWO driven by dual-exponential voltage pulses. We delve into the spectral properties, power level, and temporal profiles (including rising time, saturation time, and pulse duration) of the resultant HPM generation driven by a dual-exponential voltage pulse, all meticulously delineated and comparable to conventional rectangular-pulse driving scenarios. Our findings underscore the potential of dual-exponential voltage pulses in driving HPM sources, highlighting their compactness and cost-effectiveness as significant advantages.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 10","pages":"5145-5150"},"PeriodicalIF":1.3,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890229","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