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

Final Design and Tests of the In-Vessel Shutter of the ITER Wide Angle Viewing System (WAVS) in Equatorial Port 12 位于赤道港 12 的热核实验堆广角观察系统（WAVS）舱内快门的最终设计和测试

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-07-25 DOI: 10.1109/TPS.2024.3424203

C. Guillon;S. Vives;M. H. Aumeunier;E. Delmas;J. Grosy;N. Lapcevic;N. Lefèvre;L. Letellier;M. Proust;F. Le Guern;J. Piqueras

{"title":"Final Design and Tests of the In-Vessel Shutter of the ITER Wide Angle Viewing System (WAVS) in Equatorial Port 12","authors":"C. Guillon;S. Vives;M. H. Aumeunier;E. Delmas;J. Grosy;N. Lapcevic;N. Lefèvre;L. Letellier;M. Proust;F. Le Guern;J. Piqueras","doi":"10.1109/TPS.2024.3424203","DOIUrl":"10.1109/TPS.2024.3424203","url":null,"abstract":"The ITER wide angle viewing system (WAVS) is a major diagnostic for machine protection, plasma control, and physics analysis. It will measure the surface temperature of the plasma-facing components by infrared thermography and will image the plasma emission in the visible range. The global system is composed of 15 lines of sight (LoS) located in four equatorial ports, covering 70% of the Tokamak internal surface. This article focuses on an in-vessel component, the shutter, present in each line of sight of the WAVS. Indeed, the shutter will protect the first mirrors from direct erosion due to fast particles from the plasma and/or direct contamination due to slow particles from glow discharges during first wall conditioning. Integrated within each first mirror unit, this mechanism is a critical component since it undergoes severe constraints, while it has to perform a robust cinematic to achieve 30000 cycles over all ITER phases. The shutter mechanism consists of a pneumatic actuated bellows, which rotates a lever blade, thanks to its linear displacement through two pivots. Two electrical end switches monitor its stroke. On top of the protection function, the shutter incorporates an in situ infrared calibration source. This calibration source consists in a heater, regulated by a thermocouple and inserted on its moving blade. The shutter is fully water-cooled, except all mobile parts, such as the bellows and the blade. A prototype of this shutter has been developed, manufactured and tested. Over 100000 actuations have been achieved under representative conditions while keeping its full operability. This article presents the shutter’s design presented at the FDR and describes its validation thanks to the thermal cycling tests.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781755","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

Validity of 2-D Axisymmetric Simplification in Modeling Microwave Discharges in Waveguide-Based Plasma Sources 基于波导的等离子体源中微波放电建模的二维轴对称简化的有效性

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-07-25 DOI: 10.1109/TPS.2024.3429355

Wencong Zhang;Yong Yang;Renyu Peng;Dongxue Han;Li Wu;Junwu Tao;Huacheng Zhu

{"title":"Validity of 2-D Axisymmetric Simplification in Modeling Microwave Discharges in Waveguide-Based Plasma Sources","authors":"Wencong Zhang;Yong Yang;Renyu Peng;Dongxue Han;Li Wu;Junwu Tao;Huacheng Zhu","doi":"10.1109/TPS.2024.3429355","DOIUrl":"10.1109/TPS.2024.3429355","url":null,"abstract":"Modeling microwave discharges in waveguide-based plasma sources is a complex multiphysics problem involving the intricate interplay of electromagnetic, thermal, and plasma dynamics, which is extremely computational demanding. Previous studies often neglected the rectangular waveguide, focused only on the cylindrical discharge tube, and simplified it further into two-dimensions 2-D by assuming axisymmetry for the microwave and plasma distributions in the discharge tube. However, the validity of the assumption and the simplification remains controversial. To address this issue, this study compares the discharge characteristics between 3-D models and their 2-D axisymmetric simplifications to identify the conditions under which the simplified approach is appropriate and to clarify its limitations. The results indicate that the 2-D axisymmetric models can capture the main features of the 3-D discharge behavior effectively under certain conditions, offering significant computational cost savings. However, deviations become significant when the microwave electric field that sustains discharge breaks axial symmetry. This is evident in glass tubes with either a small thickness or high-permittivity walls that permit the nonaxisymmetric electromagnetic modes. Furthermore, this study introduces a method to enforce axisymmetry in the microwave field and plasma distributions in the discharge tube of a two-port waveguide-based plasma source using coherent wave excitations. The findings of this study can serve as a valuable reference in using the 2-D axisymmetric model to investigate and design other microwave plasma sources (MPSs).","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781757","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 Activation by an Electron Beam of an Argon– Hydrogen Mixture on the Formation Effect of Protonated Monomers and Small Argon Clusters in Condensing Supersonic Flow 电子束激活氩氢混合物对质子化单体和小氩簇在冷凝超音速气流中形成的影响

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-07-25 DOI: 10.1109/TPS.2024.3427317

V. E. Khudozhitkov;A. E. Zarvin;V. V. Kalyada

{"title":"The Activation by an Electron Beam of an Argon– Hydrogen Mixture on the Formation Effect of Protonated Monomers and Small Argon Clusters in Condensing Supersonic Flow","authors":"V. E. Khudozhitkov;A. E. Zarvin;V. V. Kalyada","doi":"10.1109/TPS.2024.3427317","DOIUrl":"10.1109/TPS.2024.3427317","url":null,"abstract":"Recently, great interest in the analysis of the ArH+ ion electronic states in a number of scientific studies, in which there are significant discrepancies between the available experimental measurements and theoretical results has been shown. The most efficient production of protonated argon was achieved by electron ionization of the supersonic flows of argon and hydrogen mixtures. In this article, the clustering influence on the formation of protonated monomers and small argon clusters is considered. Two variants of ionization of supersonic fluxes were used: by a high-voltage electron beam immediately in the jet with ion registration by transport to the mass spectrometer of a molecular beam system (HVEB method) or by a low-energy electron beam directly in the mass spectrometer detector (EBMS method) of molecular beam skimmed from a supersonic jet. The effect of stagnation pressure and the average cluster size in a gas stream on the argon-hydrogen compound ions formation have been studied. The parameters of the most effective ion formation of such compounds in the considered range of gas-dynamic parameters are determined. Suggestions about the type (ArnH\u0000<inline-formula> <tex-math>$_{m})^{+}$ </tex-math></inline-formula>\u0000 ions formation mechanism in a clustered stream are considered.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781758","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

Continuum Hard-Photon K-Shell Yields From Z-Pinch Implosions: Present Status and Scaling to Higher Currents Z-夹子内爆产生的连续硬光子K壳产率：现状及向更大电流的扩展

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-07-25 DOI: 10.1109/TPS.2024.3428372

Alexander L. Velikovich;Nicholas D. Ouart;Arati Dasgupta;John L. Giuliani;Varun Tangri;Adam J. Harvey-Thompson;Marc-Andre Schaeuble;Jens Schwarz;Clayton E. Myers;David J. Ampleford;Roger A. Vesey;Brent Jones

{"title":"Continuum Hard-Photon K-Shell Yields From Z-Pinch Implosions: Present Status and Scaling to Higher Currents","authors":"Alexander L. Velikovich;Nicholas D. Ouart;Arati Dasgupta;John L. Giuliani;Varun Tangri;Adam J. Harvey-Thompson;Marc-Andre Schaeuble;Jens Schwarz;Clayton E. Myers;David J. Ampleford;Roger A. Vesey;Brent Jones","doi":"10.1109/TPS.2024.3428372","DOIUrl":"10.1109/TPS.2024.3428372","url":null,"abstract":"The use of the recombination continuum for X-ray radiation production in Z-pinches is discussed as an option for generating high yields in the warm photon energy range, \u0000<inline-formula> <tex-math>$hslash omega gt 10$ </tex-math></inline-formula>\u0000 keV. The free-bound direct-recombination continuum emission is an inherently weaker radiation production mechanism than the resonant-line emission. However, it is challenging, if at all possible, to heat stagnated Z-pinch plasmas with atomic numbers \u0000<inline-formula> <tex-math>$Z_{A} gt 36$ </tex-math></inline-formula>\u0000 to temperatures above ~10 keV needed for efficient K-shell line emission in the warm photon energy range. As the atomic number of the load material increases from \u0000<inline-formula> <tex-math>$Z_{A} = 18$ </tex-math></inline-formula>\u0000 (argon) to \u0000<inline-formula> <tex-math>$Z_{A} = 26$ </tex-math></inline-formula>\u0000 and 29 (iron and copper, respectively), the scaling parameter determining the ratio of the recombination continuum to hydrogen-like line K-shell yield increases by a factor of 2–3. This indicates a possibility of using wire-array Z-pinch implosions on next-generation pulsed-power facilities (NGPPs) to produce significant continuum yields in warm photons. Such an option is feasible, provided that stripping substantial fractions of iron and copper ions at stagnation to an H-like state can be demonstrated. We analyze K-shell continuum yields measured in recent Z experiments with argon double-shell gas-puff and stainless-steel nested wire-array loads, with a view of scaling present-day results to higher driver currents.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781756","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

Spiker-Sustainer Circuit for Glow Discharge: Relation Between SOS Behavior and Output Rise Time 用于辉光放电的 Spiker-Sustainer 电路：SOS 行为与输出上升时间之间的关系

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-07-23 DOI: 10.1109/tps.2024.3427753

Yang He, Taisei Ishiyama, Kazuki Nagao, Taichi Sugai, Weihua Jiang

引用次数: 0

A Pulse Rising Edge Steepening Circuit Design for Marx Generators 用于 Marx 发生器的脉冲上升沿陡峭化电路设计

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-07-23 DOI: 10.1109/tps.2024.3428358

Shoulong Dong, Sizhe Xiang, Lisheng Zhao, Qinyu Huang, Haobo Yang, Huangtong Luo, Chenguo Yao, Liang Yu

引用次数: 0

Modeling and Design of Rogowski Coil for Pulsed Current Signal Measurement With Analytical, Experimental, and Finite Element Method 用分析、实验和有限元方法对用于脉冲电流信号测量的罗戈夫斯基线圈进行建模和设计

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-07-23 DOI: 10.1109/tps.2024.3424935

Priti Bawankule, Kandasamy Chandrasekaran

引用次数: 0

Avalanche Transistor-Based Marx Generator Provides 1.15-kV/1-MHz Sub-Nanosecond Pulses Due to Triggering Acceleration 基于雪崩晶体管的马克思发生器可通过触发加速提供 1.15-kV/1-MHz 亚纳秒脉冲

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-07-23 DOI: 10.1109/tps.2024.3429138

Kaijun Wen, Lin Liang, Xiaoxue Yan, Ziyang Zhang

引用次数: 0

Effect of Plasma Mode Frequency on Gaussian Laser Beam in Hot Plasma 等离子体模式频率对热等离子体中高斯激光束的影响

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-07-23 DOI: 10.1109/TPS.2024.3426555

Najah Kabalan;Ali Asad;Fadi Motawej

{"title":"Effect of Plasma Mode Frequency on Gaussian Laser Beam in Hot Plasma","authors":"Najah Kabalan;Ali Asad;Fadi Motawej","doi":"10.1109/TPS.2024.3426555","DOIUrl":"10.1109/TPS.2024.3426555","url":null,"abstract":"The effect of plasma mode frequency on Gaussian laser beam in hot plasma was investigated, and the impact of ponderomotive force and electron temperature was taken into consideration The conductivity tensor of hot plasma was defined and the wavenumber as a function of plasma mode frequency was determined. Analytical methods were used to derive Gaussian parameters with respect to the frequency of the plasma mode. The current density induced by ponderomotive force significantly changes the dielectric constant of hot plasma. We found that waist, spot size, radius of curvature, and Gouy phase of Gaussian laser beam exhibit rapid decrease as plasma mode frequency increases, while the beam intensity follows a bell-shaped profile, which increases rapidly at the waist and decreases toward the edges. The results show that the laser beam becomes narrower and its intensity becomes higher than in vacuum. This phenomenon has complex nonlinear implications; it impacts self-focusing, self-modulation, generation of harmonics, and sidebands. Tightly focused beam conserves energy and improves energy transfer, providing efficiency in material handling and spectroscopy. The results presented in this work can be useful for advancing our plasma.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781764","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

Trap Characteristics and Space Charge Behavior of High Voltage XLPE Cable Insulation 高压 XLPE 电缆绝缘的陷波特性和空间电荷行为

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-07-23 DOI: 10.1109/tps.2024.3426648

Chengyan Ren, Lei Niu, Xiangnan Cao, Haozhou Wang, Shuyu Chen, Tao Shao

引用次数: 0