2011 Abstracts IEEE International Conference on Plasma Science最新文献_第9页

Simulation of self-neutralization techniques for charged particle thrusters 带电粒子推力器自中和技术的模拟

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5992907

D. Liaw, T. Liu, B. Gilchrist

引用次数: 3

Progress in field ionization source development for compact neutron generators 紧凑型中子发生器场电离源研制进展

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5993092

A. Persaud, O. Waldmann, T. Schenkel, R. Kapadia, A. Javey

引用次数: 0

Three-dimensional, time-dependent simulation of Inductive Output Tubes 电感输出管的三维、时变仿真

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5992910

H. Freund, J. Verboncoeur, W. Sessions, B. Jamroz, C. Jhurani, L. Ives, T. Bui

{"title":"Three-dimensional, time-dependent simulation of Inductive Output Tubes","authors":"H. Freund, J. Verboncoeur, W. Sessions, B. Jamroz, C. Jhurani, L. Ives, T. Bui","doi":"10.1109/PLASMA.2011.5992910","DOIUrl":"https://doi.org/10.1109/PLASMA.2011.5992910","url":null,"abstract":"We report on a 3-dimensional (3D), time-domain simulation code (NEMESIS [1]) for Inductive Output Tubes (IOTs). NEMESIS integrates the equivalent circuit equations in time coupled with the Lorentz force equations for particle trajectories. The RF fields are found by using the cavity voltage as a scale factor in either an analytic model (Kosmahl and Branch [2]) or by means of a 3D field map generated by electromagnetic structure simulators. The electron trajectories are integrated in these RF fields as well as using magnetostatic focusing fields. Two Poisson solvers had previously been implemented in 2D: (1) using the method of successive over relaxation (SOR), and (2) a multi-grid (MG) algorithm. NEMESIS was successfully benchmarked [1] for an IOT developed at CPI (K5H90W-2) using the SOR solver, and this result was recovered using the MG solver. We report on the implementation of a fully 3D Poisson solver based on the PETSc library [3]. The IOT used to validate NEMESIS is azimuthally symmetric; hence, a 2D solution is/was adequate to simulate the tube. Initial results in 3D, therefore, primarily constitute a test of the 3D algorithm. The initial 3D simulations are in agreement with the former 2D results. The impact of the additional number of macro-particles and grid cells on the run time of the 3D formulation is not excessive compared to the 2D simulation. The technique, results, and run times will be discussed, as will future research plans.","PeriodicalId":221247,"journal":{"name":"2011 Abstracts IEEE International Conference on Plasma Science","volume":"82 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":"126286899","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

Atmospheric pressure plasma jet effects on sterilization of e. coli and s. aureus 大气压等离子体射流对大肠杆菌和金黄色葡萄球菌灭菌的影响

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5992935

T. Aktan, A. Gulec, K. Ozaltin, L. Oksuz, S. Ulusoy

引用次数: 0

Load impedance dynamics in the RITS-6 self-magnetic -pinch diode RITS-6自磁夹脚二极管负载阻抗动态

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5993078

T. Renk, M. Johnston, B. Oliver, N. Bruner, D. Welch

{"title":"Load impedance dynamics in the RITS-6 self-magnetic -pinch diode","authors":"T. Renk, M. Johnston, B. Oliver, N. Bruner, D. Welch","doi":"10.1109/PLASMA.2011.5993078","DOIUrl":"https://doi.org/10.1109/PLASMA.2011.5993078","url":null,"abstract":"The self-magnetic-pinch (SMP) diode is being developed on the Radiographic Integrated Test Stand (RITS-6) at Sandia National Laboratories. The time history of SMP load impedance is affected by the evolution of populations of high-energy electrons and ions from the cathode and anode, respectively, as well as by electrode plasma evolution. Framing camera images of optical emission spectra from electrode plasmas has been measured [1], and anode plasma dynamics has been modeled [2]. Experimental data suggest that the interaction of high-energy and anode plasma ions can result in premature impedance collapse. These effects vary with the cathode radius and anode-cathode (A-K) gap. There is experimental evidence that changes to the anode material composition can affect the load impedance evolution. The standard anode structure consists of thin Al foil placed 0.8 mm in front of a Ta plate. We are experimenting with Al coatings placed directly upon the Ta surface, as well as with ‘limited anodes’, where the Al foil/Ta plate is replaced with a graphite plate of similar electron range, and with either tungsten or tantalum insert at small radius. Preliminary results with the Al-coated Ta anode indicate equivalent or better impedance history compared to the standard anode. Experiments with anode materials modifications are ongoing, and latest results will be presented.","PeriodicalId":221247,"journal":{"name":"2011 Abstracts IEEE International Conference on Plasma Science","volume":"9 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":"128363729","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

Focusing of laser-accelerated protons for fast ignition studies 用于快速点火研究的激光加速质子聚焦

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5992922

C. Bellei, T. Bartal, F. Beg, M. Foord, H. McLean, P. Patel, D. Strozzi, M. Key, R. Stephens

引用次数: 0

Application of a bifilar helix discharge in endoscope biopsy channels for plasma decontamination and biomedical aspects 双螺旋放电在内窥镜活检通道中的应用，用于血浆净化和生物医学方面

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5993041

J. Winter, S. Reuter, K. Masur, S. Hasse, M. Polák, U. Schnabel, J. Ehlbeck, K. Weltmann, R. Schneider

引用次数: 0

Diffusive radial expansion effect on long-Rail spark dynamical impedances 扩散径向膨胀对长轨火花动力阻抗的影响

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5993317

L. Wang

引用次数: 0

Resonant oscillations of air bubbles driven by a time varying electric field 时变电场驱动下气泡的共振振荡

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5993105

B. Sommers, J. Foster

引用次数: 0

Recent tests on a multi-megawatt 95 GHz GYROTRON 最近对一个多兆瓦95千兆赫回旋加速器进行了测试

2011 Abstracts IEEE International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5992993

S. Cauffman, M. Blank, P. Borchard, P. Cahalan, K. Felch

{"title":"Recent tests on a multi-megawatt 95 GHz GYROTRON","authors":"S. Cauffman, M. Blank, P. Borchard, P. Cahalan, K. Felch","doi":"10.1109/PLASMA.2011.5992993","DOIUrl":"https://doi.org/10.1109/PLASMA.2011.5992993","url":null,"abstract":"A 95 GHz gyrotron capable of generating CW power levels in excess of 2 MW is currently under development at CPI. The gyrotron employs a single-anode electron gun that produces a 90-kV, 75-A electron beam for interaction with the TE22,6,1 cavity mode. Output power from the cavity is transformed into a fundamental Gaussian beam using an internal converter that consists of a waveguide launcher and three focusing and phase-correcting mirrors. The Gaussian beam exits the tube through a chemical-vapor-deposition (CVD) diamond window. The spent electron beam is dissipated in a 40.6-cm diameter collector fabricated from a strengthened copper alloy. The collector nominally operates at a voltage of 61 kV relative to the cathode potential to minimize the amount of power absorbed in the collector and to improve efficiency. In recent tests on the gyrotron an output power of 1.92 MW was achieved with 40% efficiency at the nominal beam current of 75 A. During the tests, we noted a significant reduction in the amount of power absorbed in the beam tunnel compared with earlier versions of the tube. The reduction in beam tunnel power is attributed to the use of a modified beam tunnel design to reduce the possibility of parasitic oscillations.1 Results of recent tests and future plans will be presented.","PeriodicalId":221247,"journal":{"name":"2011 Abstracts IEEE International Conference on Plasma Science","volume":"35 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":"128874420","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: 1