2013 Abstracts IEEE International Conference on Plasma Science (ICOPS)最新文献_第9页

Experiments with colliding supersonic plasma jets on the magpie pulsed power facility 超声速等离子体射流在喜鹊脉冲动力装置上的碰撞实验

2013 Abstracts IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2013-06-16 DOI: 10.1109/PLASMA.2013.6633313

L. Pickworth, S. Lebedev, F. Suzuki-Vidal, G. Swadling, G. Hall, S. Bland, M. Bennett, G. Burdiak, J. Skidmore, L. Suttle, P. de Grouchy, J. Chittenden, M. Bocchi, N. Niasse

{"title":"Experiments with colliding supersonic plasma jets on the magpie pulsed power facility","authors":"L. Pickworth, S. Lebedev, F. Suzuki-Vidal, G. Swadling, G. Hall, S. Bland, M. Bennett, G. Burdiak, J. Skidmore, L. Suttle, P. de Grouchy, J. Chittenden, M. Bocchi, N. Niasse","doi":"10.1109/PLASMA.2013.6633313","DOIUrl":"https://doi.org/10.1109/PLASMA.2013.6633313","url":null,"abstract":"Summary form only given. Experimental investigation of collisions of supersonic plasma jets with metal foils and head-on collisions of two jets will be presented. The jets are produced by ablation of thin Al foils driven by 1.4MA, 250ns current pulse in a radial foil z-pinch configuration<;sup>[1.2,<;/sup> <;sup>3]<;/sup>. The jets propagate with velocity of ~50-100km/s, have high degree of collimation (opening angle 2-5°) and are radiatively cooled (cooling time <;<; hydrodynamic times). Collisions of the jets with foils, as well as inter-jet collisions, create a system of strong shocks both in the central dense part of the jet and in the lower density halo plasma which surrounds the jet and moves with the same speed. The formed shock features are sustained for ~300ns, and are diagnosed with laser interferometry, optical and XUV imaging, and with Thomson scattering diagnostics. Interpretation of the results indicates that a dynamically significant magnetic fields are present in the system, balancing the ram pressure of the flow and supporting extended stationary shock structures. The results are relevant to the studies of astrophysical phenomena in the laboratory, in particular internal shocks in jets young stars, and accretion shocks, and for understanding of magnetized high energy density plasma flows.","PeriodicalId":6313,"journal":{"name":"2013 Abstracts IEEE International Conference on Plasma Science (ICOPS)","volume":"32 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2013-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75184754","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

Target surface layer dynamics during application of intense electron beams 强电子束作用下靶面层动力学

2013 Abstracts IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2013-06-16 DOI: 10.1109/PLASMA.2013.6633333

R. Fetzer, W. An, A. Weisenburger, G. Mueller

{"title":"Target surface layer dynamics during application of intense electron beams","authors":"R. Fetzer, W. An, A. Weisenburger, G. Mueller","doi":"10.1109/PLASMA.2013.6633333","DOIUrl":"https://doi.org/10.1109/PLASMA.2013.6633333","url":null,"abstract":"Summary form only given. Intense pulsed electron beams are commonly used to improve mechanical properties of metal targets in near-surface regions or for surface alloying. In some cases, however, the intended property changes are accompanied by the development of surface roughness. The exact origin of this phenomenon is still under debate. In this work, the dynamics of the target surface layer in its melted stage is investigated experimentally and theoretically. The pulsed electron beam facility GESA at KIT is used to generate electron beams with power density 0.5-2 MW/cm2, electron energy 120 keV, and pulse duration up to 200 μs. Various fast in-situ optical diagnostic tools have been set up and successfully tested during treatment of stainless steel, copper, and aluminum targets. After this preceding work, a systematic investigation of the influence of various materials and of specific beam parameters on the surface layer dynamics is now performed. The experimental studies are accompanied by numerical simulations of heat transfer and melt motion and by theoretical considerations concerning the relevance of possible hydrodynamic instabilities.","PeriodicalId":6313,"journal":{"name":"2013 Abstracts IEEE International Conference on Plasma Science (ICOPS)","volume":"5 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2013-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73076697","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

Evaluation of plasma induced liquid chemistry for bacteria treatment with a remote RF argon atmospheric pressure plasma jet 远程射频氩气常压等离子体射流处理细菌的等离子体诱导液体化学评价

2013 Abstracts IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2013-06-16 DOI: 10.1109/PLASMA.2013.6634840

S. Hofmann, K. van Gils, R. Brandenburg, P. Bruggeman, Bouke Boukema

{"title":"Evaluation of plasma induced liquid chemistry for bacteria treatment with a remote RF argon atmospheric pressure plasma jet","authors":"S. Hofmann, K. van Gils, R. Brandenburg, P. Bruggeman, Bouke Boukema","doi":"10.1109/PLASMA.2013.6634840","DOIUrl":"https://doi.org/10.1109/PLASMA.2013.6634840","url":null,"abstract":"The inactivation of bacteria suspended in liquids by an atmospheric pressure plasma is a complicated and yet not well understood process, due to several constituents of the “plasma cocktail” in the plasma/gas phase which can contribute to bacteria inactivation and the transport and chemistry processes of the created species in the liquid phase. To investigate the main players in the bacteria inactivation processes we use a RF atmospheric pressure plasma jet which is used for remote bacteria treatment. The plasma jet is constructed to allow accurate power measurements. Mass spectrometry, optical emission spectroscopy as well as electrical diagnostics have been used to investigate the amount of charged and reactive species and UV-emission reaching the water surface. We show that with the chosen treatment conditions, reactive species (ROS and RNS) concentrations and probably (V)UV emission are high enough to induce chemistry in the liquid phase leading to bacteria inactivation, while the electric field and charged particles are too low to induce observed effects. To further determine the role of the reactive species interaction within the liquid, nitrite, nitrate and hydrogen peroxide concentrations have been obtained by ion chromatography and colorimetric methods. Combined with measured and estimated values of the reactive species in the gas phase we use a 0D-solution kinetics model to calculate other species expected in the liquid phase and important for bacteria inactivation, which have not been measured. We show that the obtained concentrations of HNO2, ONOO and H2O2 are in the same range as reported values in literature of the minimum inhibitory and bactericidal concentrations.","PeriodicalId":6313,"journal":{"name":"2013 Abstracts IEEE International Conference on Plasma Science (ICOPS)","volume":"91 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2013-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74438099","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

PPPS-2013: UNM transparent cathode experiments revisited PPPS-2013: UNM透明阴极实验再现

2013 Abstracts IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2013-06-16 DOI: 10.1109/PLASMA.2013.6635117

S. Prasad, C. Leach, C. J. Buchenauer, M. Fuks, E. Schamiloglu

引用次数: 0

PPPS-2013: Emittance and emission from arrays with statistical variation PPPS-2013:统计变异阵列的发射度和发射度

2013 Abstracts IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2013-06-16 DOI: 10.1109/PLASMA.2013.6633506

J. Petillo, D. Panagos, K. Jensen

引用次数: 0

X-ray pinhole camera measurements x射线针孔相机测量

2013 Abstracts IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2013-06-16 DOI: 10.1109/PPC.2013.6627633

D. Nelson, M. Berninger, P. Flores, Douglas E. Good, D. Henderson, K. Hogge, S. Huber, S. Lutz, S. E. Mitchell, R. Howe, C. V. Mitton, I. Molina, D. R. Bozman, S. Cordova, D. R. Mitchell, E. Ormond

{"title":"X-ray pinhole camera measurements","authors":"D. Nelson, M. Berninger, P. Flores, Douglas E. Good, D. Henderson, K. Hogge, S. Huber, S. Lutz, S. E. Mitchell, R. Howe, C. V. Mitton, I. Molina, D. R. Bozman, S. Cordova, D. R. Mitchell, E. Ormond","doi":"10.1109/PPC.2013.6627633","DOIUrl":"https://doi.org/10.1109/PPC.2013.6627633","url":null,"abstract":"The development of the rod pinch diode has lead to high resolution radiography used on contained explosive experiments. The rod pinch diodes use a small diameter anode rod, which extends through a cathode aperture. Electrons borne off the aperture edge can self-insulate and pinch onto the tip of the rod, creating an intense, small x-ray source. This source is utilized as the primary diagnostic on numerous experiments that include high-value, single-shot events. In such applications there is an emphasis on machine reliability, x-ray reproducibility, and x-ray quality. We have observed that an additional pinch occurs at the interface near the anode rod and the rod holder. This suggests that there are stray electrons emitted from the surfaces of the surrounding area. In this paper we present results of x-ray measurements using a pinhole camera. The camera geometry used is an upstream view 30° with respect to the diode centerline. This diagnostic will be employed to: (1) diagnose x-ray reproducibility and quality, and (2) investigate the effect of different diode configurations.","PeriodicalId":6313,"journal":{"name":"2013 Abstracts IEEE International Conference on Plasma Science (ICOPS)","volume":"50 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2013-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73791453","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

Nonequilibrium effect for shot noise in ultrafast laser-induced electron emission 超快激光诱导电子发射中散粒噪声的非平衡效应

2013 Abstracts IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2013-06-16 DOI: 10.1109/PLASMA.2013.6634953

Y. Zhu, L. Ang

引用次数: 0

Implicit electromagnetic solver with plasma applications 等离子体应用的隐式电磁求解器

2013 Abstracts IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2013-06-16 DOI: 10.1109/PLASMA.2013.6633428

J. Cary, R. Crockett, N. Xiang

引用次数: 0

PPPS-2013: High current iron-free pulsed quadrupole lenses PPPS-2013:高电流无铁脉冲四极透镜

2013 Abstracts IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2013-06-16 DOI: 10.1109/PLASMA.2013.6633255

C. Tenholt, O. Kester, P. Spiller, U. Blell

{"title":"PPPS-2013: High current iron-free pulsed quadrupole lenses","authors":"C. Tenholt, O. Kester, P. Spiller, U. Blell","doi":"10.1109/PLASMA.2013.6633255","DOIUrl":"https://doi.org/10.1109/PLASMA.2013.6633255","url":null,"abstract":"For the transfer of ions between synchrotrons or for the final focus on targets, pulsed iron free quadrupole lenses are well suited. For those applications an extremely high field gradient is needed, that cannot be achieved with standard magnets as they are limited by saturation of the iron yoke. Another option would be superconducting magnets. High current pulsed lenses are able to produce a similar gradient for a short time as the superconducting magnets without the complex cryogenic systems. At least one doublet is needed to focus the ion bunches in both x- and y-axes. The current needed to reach magnetic field gradients for typical beam energies of the SIS18 is about 400 kA. Therefore the pulse duration need to be a few 10 μsec long. It is achieved by discharging a capacitor bank through a spark gap. The pulse is then applied to the four conductors forming the quardupole, which are switched in series. Each conductor is built of many separate lead strands, which are drilled and isolated against each other. By this the impacts of the skin effect are compensated. The shape of the conductor equals a cos(2θ)-distribution with respect to their dimensions and the distance to the beam. For the protection of close-by beamline components the quadrupole is shielded by an electromagnetic barrier which is laminated to avoid eddy currents. The concept and simulations will be presented.","PeriodicalId":6313,"journal":{"name":"2013 Abstracts IEEE International Conference on Plasma Science (ICOPS)","volume":"289 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2013-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85243336","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

Recent development of the fore-vacuum plasma electron sources 前真空等离子体电子源研究进展

2013 Abstracts IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2013-06-16 DOI: 10.1109/PLASMA.2013.6633472

E. Oks

引用次数: 0