2011 Abstracts IEEE International Conference on Plasma Science最新文献

Heat transfer in beam optics analyzer 光束光学分析仪中的传热

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-12-15 DOI: 10.1109/IRMMW-THZ.2011.6104992

T. Bui, L. Ives, M. Read

引用次数: 0

An implicit maxwell solver 隐式麦克斯韦求解器

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5992902

A. Christlieb, Lee VanGroingen, B. Ong

引用次数: 0

Studies of electronegative Ar/O2 discharge in a constricted hollow anode plasma source using dual probe technique 缩窄空心阳极等离子体源中Ar/O2电负性放电的双探针技术研究

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5992980

M. Mujawar, S. Karkari, M. Turner

{"title":"Studies of electronegative Ar/O2 discharge in a constricted hollow anode plasma source using dual probe technique","authors":"M. Mujawar, S. Karkari, M. Turner","doi":"10.1109/PLASMA.2011.5992980","DOIUrl":"https://doi.org/10.1109/PLASMA.2011.5992980","url":null,"abstract":"Uniform high density electronegative plasmas find important application for plasma heating by neutral beams in fusion devices and in material processing. In this work we present a constricted hollow anode plasma source (CHAPS) for the investigation of electronegative Ar/O2 discharge. The source consists of a series of equidistant stainless steel parallel plates acting as cathode with a small stainless steel tube as the anode. The plasma comprise of highly uniform density outside the cathode plates and an intense glow near the anode1. The negative oxygen ion fraction is determined by measuring the electron density by hairpin probe and ion density using a planer Langmuir probe. The negative ion density in the bulk plasma is typically 1016 m−3 and increases monotonically as a function of pressure and power. The electronegativity of the discharge is typically close to 0.5 and remains constant with the applied power. Whereas the negative ion density in the anode region varies from 1016 m−3 to 1017 m−3 with electronegativity of 3.0 near the edge of the anodic glow and decreases to 1.0 with the distance from the anode glow.","PeriodicalId":221247,"journal":{"name":"2011 Abstracts IEEE International Conference on Plasma Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115618607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Intense ultrashort laser-Xe cluster interaction 强超短激光- xe簇相互作用

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5993260

J. Davis, T. Petrova, G. Petrov, K. Whitney

{"title":"Intense ultrashort laser-Xe cluster interaction","authors":"J. Davis, T. Petrova, G. Petrov, K. Whitney","doi":"10.1109/PLASMA.2011.5993260","DOIUrl":"https://doi.org/10.1109/PLASMA.2011.5993260","url":null,"abstract":"The last several years have witnessed an explosion of activity involving the interaction of clusters with intense ultrashort pulse lasers. The interest in laser-cluster interaction has not been only of academic interest, but also because of the wide variety of potential applications. Clusters can be used as a compact source of X-rays, incoherent as well as coherent radiation, and fast ions capable of driving a fusion reaction in deuterium plasma. Some of the applications include EUV lithography, EUV and X-ray microscopy, X-ray tomography and a variety of applications in biology and material sciences. In this talk a model of laser-cluster interaction dynamics is presented that describes the process of amplification from the incident laser pulse to the final gain calculations. The focus of this research is on the feasibility of creating population inversions and gain in some of the inner shell hole state transitions in highly ionized Xe. The model couples a molecular dynamics treatment of the explosively-driven cluster expansion to a comprehensive multiphoton-radiative ionization model including single- and double-hole state production within the Co-and Fe-like ionization stages of Xe. The hole state dynamics is self-consistently coupled to the valence-state collisional-radiative dynamics of the Ni-, Co-, and Fe-like ionization stages of xenon. In addition, the model includes tunneling ionization rates that confirm the initial condition assumption that Ni-like ground states are created almost instantaneously, the creation of which is needed to support the interpretations of the measured x-ray data. With the use of tunneling ionization rates, all of the N-shell, n=4 electrons are striped from a xenon atom in less than a femtosecond at laser intensities larger than 1019W/cm2. Thus, our calculations do not support the initial experimental data interpretations in which the measured gains have been associated with double holes in more highly ionized stages of xenon (Xe32+, Xe34+, Xe35+, and Xe37+).","PeriodicalId":221247,"journal":{"name":"2011 Abstracts IEEE International Conference on Plasma Science","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116875769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Radar cross section simulation of metal cone covered with plasma 等离子体覆盖金属锥体的雷达截面模拟

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5993223

She Shou, M. Chung

引用次数: 0

Hydrodynamic and magnetically driven jets on the MAGPIE generator MAGPIE发电机上的流体动力和磁力驱动射流

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5993398

F. Suzuki-Vidal, S. Lebedev, G. Swadling, M. Bocchi, P. de Grouchy, G. Burdiak, S. Bland, G. Hall, A. Harvey-Thompson, E. Khoory, L. Pickworth, J. Skidmore, J. Chittenden, M. Krishnan, K. Wilson-Elliott, R. Madden, Andrea Ciardi

{"title":"Hydrodynamic and magnetically driven jets on the MAGPIE generator","authors":"F. Suzuki-Vidal, S. Lebedev, G. Swadling, M. Bocchi, P. de Grouchy, G. Burdiak, S. Bland, G. Hall, A. Harvey-Thompson, E. Khoory, L. Pickworth, J. Skidmore, J. Chittenden, M. Krishnan, K. Wilson-Elliott, R. Madden, Andrea Ciardi","doi":"10.1109/PLASMA.2011.5993398","DOIUrl":"https://doi.org/10.1109/PLASMA.2011.5993398","url":null,"abstract":"The formation of highly supersonic, radiatively cooled plasma jets with applications to laboratory astrophysics has been an active area of research on the MAGPIE generator. Two experimental arrangements, radial wire arrays1 and radial foils2, can produce plasma flows with similar dimensionless numbers to those encountered in protostellar jets. In radial wire arrays, a magnetically driven jet on the axis of a cavity evolves into a “clumpy” outflow due to the formation of current-driven instabilities, which could be relevant to the spatial and temporal variability of features observed in protostellar jets. In radial foils, a hydrodynamic jet interacts with an argon ambient injected above the foil using a supersonic gas nozzle. The results are characterized by the formation of several shock features, opening the possibility of studying jet-ambient interactions in the laboratory. Experimental results from different diagnostics including laser probing and self-emission of protons will be presented. Theses results will be compared with first 3-D MHD simulations using the Gorgon code.","PeriodicalId":221247,"journal":{"name":"2011 Abstracts IEEE International Conference on Plasma Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125950446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Second harmonic gyrotron based on a 12 T superconducting magnet 基于12t超导磁体的二次谐波回旋管

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5993067

A. Fliflet, S. Gold

{"title":"Second harmonic gyrotron based on a 12 T superconducting magnet","authors":"A. Fliflet, S. Gold","doi":"10.1109/PLASMA.2011.5993067","DOIUrl":"https://doi.org/10.1109/PLASMA.2011.5993067","url":null,"abstract":"Near-THz gyrotrons are of interest for applications such as remote sensing, materials processing, and dynamic nuclear polarization (DNP) enhanced nuclear magnetic resonance (NMR) applications. We are setting up a gyrotron test-bed based on a Cryomagnetics 12-T cryogen-free, 3-inch warm-bore, superconducting magnet to investigate second- and higher-harmonic gyrotrons operating at frequencies up to 1 THz. A Varian VUW-8010 triode electron gun originally designed for a 35 GHz gyrotron and driven by a hard-tube modulator will be used initially. The cathode radius is 7 mm and the gun can be operated at voltages up to 70-keV. Adiabatic scaling laws have been used to determine the approximate parameters of the gyrating electron beam that can be produced by this gun in the axial magnetic field profile of the 12-T magnet. The first experiments will operate at the second harmonic at frequencies up to 600 GHz and powers in the kilowatt range. A cavity has been designed with an interaction length of about 1 cm and a Q of 8400. Operating modes of interest include the TE18,2 and the TE57 modes. A Vlasov-type output coupler has been designed using geometric optics. Design calculations and the status of the experiment will be discussed.","PeriodicalId":221247,"journal":{"name":"2011 Abstracts IEEE International Conference on Plasma Science","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116034571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Crater formation and signal intensity in nano- and femto-second laser ablation inductively coupled plasma mass spectrometry 纳米和飞秒激光烧蚀电感耦合等离子体质谱中陨石坑形成和信号强度

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5993264

N. LaHaye, B. Verhoff, S. S. Harilal, A. Hassanein

引用次数: 0

Synthesis of sulfonated copolymers of acrylamide by plasma-initiated copolymerization using microwave plasma 微波等离子体引发共聚法制备丙烯酰胺磺化共聚物

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5993388

F. Ghomashi, S. Kooshki, B. Shokri

{"title":"Synthesis of sulfonated copolymers of acrylamide by plasma-initiated copolymerization using microwave plasma","authors":"F. Ghomashi, S. Kooshki, B. Shokri","doi":"10.1109/PLASMA.2011.5993388","DOIUrl":"https://doi.org/10.1109/PLASMA.2011.5993388","url":null,"abstract":"The copolymers of acrylamide (AM) and 2-acrylamido-2-methylpropane sulfonic acid (AMPS) were obtained by plasma-initiated copolymerization in water solution. The effects of plasma parameters include discharge time and discharge power on the intrinsic viscosity ([η]) of synthesized copolymers were studied. The copolymers were characterized by proton nuclear magnetic resonance spectroscopy (1H-NMR) and fourier transform infrared spectroscopy (FTIR) methods. The thermal behaviour of copolymers was also investigated by thermogravimetric analysis (TGA). The results of [η] measurements as function of discharge power indicated an optimum of 27.12 dl/g at 150W of discharge power and after that [η] started to decrease. Also the measurements of [η] for different discharge time were carried out and showed an optimum of 26.03 dl/g at 30s of discharge time. The TG data showed two stages of the weight loss which the first one occurred between 270°C and 330°C, with a weight loss about 40%, and the second one happened between 350°C and 460°C, with a weight loss about 25%, respectively. The presented results show that the produced copolymers are suitable for application in enhanced oil recovery process.","PeriodicalId":221247,"journal":{"name":"2011 Abstracts IEEE International Conference on Plasma Science","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122513585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrical modeling of strongly-coupled microstrip resonator arrays for microplasma generation 用于微等离子体产生的强耦合微带谐振器阵列的电建模

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5993185

A. Hoskinson, C. Wu, J. Hopwood

引用次数: 1