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2008 IEEE 35th International Conference on Plasma Science最新文献

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Fabrication of multi-purpose probe to investigate the influence of ohmic magnetic field on density gradient in plasma 制作多用途探针，研究欧姆磁场对等离子体密度梯度的影响
2008 IEEE 35th International Conference on Plasma Science Pub Date : 2017-03-30 DOI: 10.1063/1.4978829
M. Lafouti, M. Ghoranneviss, S. Meshkani
{"title":"Fabrication of multi-purpose probe to investigate the influence of ohmic magnetic field on density gradient in plasma","authors":"M. Lafouti, M. Ghoranneviss, S. Meshkani","doi":"10.1063/1.4978829","DOIUrl":"https://doi.org/10.1063/1.4978829","url":null,"abstract":"Small tokamak is a device in which can provide the suitable situations to investigate the parameters in which can effect on plasma confinement. So the large number of experiments on plasma have been done In many tokamaks. And for obtain the data with more precision, novel diagnostics have been designed and constructed. In this paper the effect of ohmic magnetic field magnitude on radial particle flux and radial density gradient have been investigated. For this purpose a Multi-Purpose Probe (MPP) have been designed and constructed in IR-T1 tokamak. MPP has three parts in which can measured magnetic fluctuation, the radial particle flux fluctuation, ion saturation current, plasma density gradients, floating potential, radial and poloidal electric field and Mach number. The results have been shown that the ohmic magnetic field magnitude is important factor in plasma confinement. It can decrease the radial gradient density in which is one of the source of radial turbulence. We took Fast Fourier Transform (FFT...","PeriodicalId":6359,"journal":{"name":"2008 IEEE 35th International Conference on Plasma Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91397869","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
Replaceable electrodes triggered vacuum switch and its application in lightning current component A generator 可替换电极触发真空开关及其在雷击电流分量A发电机中的应用
2008 IEEE 35th International Conference on Plasma Science Pub Date : 2016-06-19 DOI: 10.1109/PLASMA.2016.7534407
Sun Jinru, Y. Xueling, X. Wenjun, C. Jingliang
{"title":"Replaceable electrodes triggered vacuum switch and its application in lightning current component A generator","authors":"Sun Jinru, Y. Xueling, X. Wenjun, C. Jingliang","doi":"10.1109/PLASMA.2016.7534407","DOIUrl":"https://doi.org/10.1109/PLASMA.2016.7534407","url":null,"abstract":"Lightning can cause severe damage to aircraft, lightning direct effect test is very important for research of spacecraft material, design of structure of aircraft, but the limitation of the measuring technology and special test apparatus has become the technical bottleneck. Lightning current components for lightning direct effect test consist of component A (initial strode), component B (Intermediate current), component C (Continuing current) and component D (Restrike). Lightning current components A and D can be produced by the type of RLC circuit and crowbar circuit. The efficiency of the conventional RLC circuit in generating long duration time impulse current wave is relative low. To solve this problem, a replaceable electrodes triggered vacuum switch is designed and researched and then a high efficiency crowbar circuit which produces lightning current component A is designed in this paper.","PeriodicalId":6359,"journal":{"name":"2008 IEEE 35th International Conference on Plasma Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89970692","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
Effects of nanosecond pulsed electromagnetic field on mitochondrial membrane potential 纳秒脉冲电磁场对线粒体膜电位的影响
2008 IEEE 35th International Conference on Plasma Science Pub Date : 2016-06-19 DOI: 10.1109/PLASMA.2016.7534132
X. Wenjun, Y. Xueling, C. Jingliang
{"title":"Effects of nanosecond pulsed electromagnetic field on mitochondrial membrane potential","authors":"X. Wenjun, Y. Xueling, C. Jingliang","doi":"10.1109/PLASMA.2016.7534132","DOIUrl":"https://doi.org/10.1109/PLASMA.2016.7534132","url":null,"abstract":"In this paper, the effects of nanosecond pulsed electromagnetic field (NPEMF) on mitochondrial membrane potential were studied. The pulsed electromagnetic field was induced by a pulsed square wave with adjustable frequency of 0∼100Hz. The rise time was less than 10ns and the duration time was 100ns. The testing amplitude of NPEMF was from 0.10mT to 1.30mT, and the frequency was 5Hz, 10 Hz, 30 Hz, 50Hz respectively. It was applied on human prostate cancer cells (PC3) under 23 °C experiment temperature and 2 hours exposed time. When the frequency was 30Hz, the experimental results showed the mitochondrial membrane potential value decreased after irradiation compared to the control group. However the relationship between mitochondrial membrane potential and NPEMF is nonlinear. T he potential was smallest when the amplitude of NPEMF was 0.44mT. When the amplitude of NPEMF is constant, the mitochondrial membrane potential increased with the increase of frequency. The value of exposed group was larger than control group 2(23 C, no irradiation). It showed that the electromagnetic field could reduce the damage caused by low temperature.","PeriodicalId":6359,"journal":{"name":"2008 IEEE 35th International Conference on Plasma Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81463896","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
Effects of plasma treated water on plants 等离子体处理水对植物的影响
2008 IEEE 35th International Conference on Plasma Science Pub Date : 2012-07-08 DOI: 10.1109/PLASMA.2012.6383483
D. Park, D. Dobrynin, G. Fridman, A. Fridman
{"title":"Effects of plasma treated water on plants","authors":"D. Park, D. Dobrynin, G. Fridman, A. Fridman","doi":"10.1109/PLASMA.2012.6383483","DOIUrl":"https://doi.org/10.1109/PLASMA.2012.6383483","url":null,"abstract":"Summary form only given. Water quality, its mineralization and chemical composition, particularly pH and nitrogen compounds, play crucial role in plant's development and growth. Treatment of water with plasma results in change of its properties and chemical composition, which in turn may affect plant growth process and subsequently agriculture produce quality.","PeriodicalId":6359,"journal":{"name":"2008 IEEE 35th International Conference on Plasma Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91397237","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: 2
Numerical studies on plasma bullet propagation and its inhibition in helium plasma jet at atmospheric pressure 大气压下氦等离子体射流中等离子体子弹传播及其抑制的数值研究
2008 IEEE 35th International Conference on Plasma Science Pub Date : 2012-07-08 DOI: 10.1109/PLASMA.2012.6383300
Fucheng Liu, W. Yan, Dezhen Wang
{"title":"Numerical studies on plasma bullet propagation and its inhibition in helium plasma jet at atmospheric pressure","authors":"Fucheng Liu, W. Yan, Dezhen Wang","doi":"10.1109/PLASMA.2012.6383300","DOIUrl":"https://doi.org/10.1109/PLASMA.2012.6383300","url":null,"abstract":"Summary form only given. Over the past years cold atmospheric pressure plasma jets (CAPPJ) have received considerable attention due to their unique capabilities and considerable application potentials in various industrial and scientific applications. It has been demonstrated by several research groups that CAPPJs are not continuous jets but discrete fast-moving plasma bullets with supersonic velocities in the order of104–105m/s. However, possible mechanisms responsible for the creation and propagation of plasma bullets still remain essentially open. Presently two explanations for this phenomenon exist. One is the ionization wave model, and the other is the streamer-like model based on photo-ionization.","PeriodicalId":6359,"journal":{"name":"2008 IEEE 35th International Conference on Plasma Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91396676","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
Description of plasma bullet in plasma jet in terms of wave-packet of plasma diffusion 从等离子体扩散波包的角度描述等离子体射流中的等离子体子弹
2008 IEEE 35th International Conference on Plasma Science Pub Date : 2012-07-08 DOI: 10.1109/PLASMA.2012.6383846
G. Cho, E. Choi, H. Uhm
{"title":"Description of plasma bullet in plasma jet in terms of wave-packet of plasma diffusion","authors":"G. Cho, E. Choi, H. Uhm","doi":"10.1109/PLASMA.2012.6383846","DOIUrl":"https://doi.org/10.1109/PLASMA.2012.6383846","url":null,"abstract":"Summary form only given. The propagation of plasma bullet in a plasma jet is described under the base of fluid theory of plasma diffusion and plasma drift as well as the gas flow. The origin of plasma bullet is analyzed to be the electrostatic plasma diffusion wave propagating in the plasma column of plasma jets. The plasma diffusion waves, electron wave as well as ion wave, propagate as the form of wave-packet modulated to the operation frequency of voltage pulse. The waves have the dispersion relation of ω∼(u d +u b +u n )k where the phase velocity is the addition of fluid such as drift velocity u d , gas blowing velocity u b , and plasma diffusion velocity u n . The waves are modulated to be the wave-packet of dω∼u g dk with the group velocity u g ∼c s 2/u n ∼(104–105) m/s where the acoustic velocity is c s ∼103 m/s and the diffusion velocity is u n ∼(10–102) m/s estimated in a plasma jet device. The plasma diffusion wave propagates resistively against the slope of plasma density gradient1.","PeriodicalId":6359,"journal":{"name":"2008 IEEE 35th International Conference on Plasma Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91397215","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
Visualization of instabilities in hot magnetized plasmas by ECE Imaging 热磁化等离子体不稳定性的ECE成像可视化
2008 IEEE 35th International Conference on Plasma Science Pub Date : 2012-07-08 DOI: 10.1109/PLASMA.2012.6384081
A. Donne, A. Bogomolov, J. Boom, I. Classen, B. Tobias, N. Luhmann, C. Domier, G. Yun, Woochang Lee, H. Park
{"title":"Visualization of instabilities in hot magnetized plasmas by ECE Imaging","authors":"A. Donne, A. Bogomolov, J. Boom, I. Classen, B. Tobias, N. Luhmann, C. Domier, G. Yun, Woochang Lee, H. Park","doi":"10.1109/PLASMA.2012.6384081","DOIUrl":"https://doi.org/10.1109/PLASMA.2012.6384081","url":null,"abstract":"Summary form only given. Electron cyclotron emission radiometry is a standard technique on most magnetically confined plasmas to measure the electron temperature profile, usually along the plasma mid plane. By combining heterodyne radiometry with optical imaging techniques it is possible to measure the electron temperature and fluctuations in this quantity in a two-dimensional section of the poloidal plasma plane.","PeriodicalId":6359,"journal":{"name":"2008 IEEE 35th International Conference on Plasma Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91385031","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
Numerical simulation of nonthermal atmospheric pressure plasma jet and comparison with experiments 非热大气压等离子体射流的数值模拟与实验比较
2008 IEEE 35th International Conference on Plasma Science Pub Date : 2012-07-08 DOI: 10.1109/PLASMA.2012.6383660
W. Ning, Lijun Wang, S. Jia, Mingzheng Fu, Z. Shi, Xingwen Li
{"title":"Numerical simulation of nonthermal atmospheric pressure plasma jet and comparison with experiments","authors":"W. Ning, Lijun Wang, S. Jia, Mingzheng Fu, Z. Shi, Xingwen Li","doi":"10.1109/PLASMA.2012.6383660","DOIUrl":"https://doi.org/10.1109/PLASMA.2012.6383660","url":null,"abstract":"Summary form only given. This paper presents a computational study of point-to-plane atmospheric helium plasma discharge. We employed a two-dimensional, axisymmetric fluid model to investigate the time-dependent characters of the discharge. Helium with small amount of nitrogen (impurity) was used as the working gas. The gap distance between the two electrodes was varied from 1mm to 15mm. The magnitude of the applied voltage's amplitude was in the range of 1kV∼10kV, and the frequency was 10 kHz. The coupled continuity equations for particles and electron energy equation were solved with the Poisson' equation using the finite element method with unstructured grids. Simulation results showed that the plasma needle operated as the corona discharge at low power and the mode transferred to glow discharge as the power surpassed certain critical value, and this value decreased either the frequency increased or the gap distance decreased. Furthermore, the simulation results were compared with the experimental results. The results showed that simulation results were in reasonable agreement with experiments.","PeriodicalId":6359,"journal":{"name":"2008 IEEE 35th International Conference on Plasma Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91396470","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
Structural phase transitions in the strongly coupled systems with isotropic potentials 具有各向同性势的强耦合体系中的结构相变
2008 IEEE 35th International Conference on Plasma Science Pub Date : 2012-07-08 DOI: 10.1109/PLASMA.2012.6383583
E. Vasilieva, O. Vaulina
{"title":"Structural phase transitions in the strongly coupled systems with isotropic potentials","authors":"E. Vasilieva, O. Vaulina","doi":"10.1109/PLASMA.2012.6383583","DOIUrl":"https://doi.org/10.1109/PLASMA.2012.6383583","url":null,"abstract":"Summary form only given. Study of structural phase transitions is of significant interest with fundamental point of view and, at present time, it is a subject of the intensive theoretical and experimental researches in various areas of physics. Such transitions are the phase transformations (of configuration, topology, polymorphic, or solid-liquid transitions) in strongly coupled systems, which consist in a structure reorganization of these systems and, in most cases, lead to a change of their symmetry type. Besides fundamental aspects, study of structural phase transitions is of special interest for development of nano- and micro- technologies, and of covers and materials with the defined properties.","PeriodicalId":6359,"journal":{"name":"2008 IEEE 35th International Conference on Plasma Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91397616","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
Plasma creation by a powerful electromagnetic radiation of terahertz gyrotrons 由太赫兹回旋管的强大电磁辐射产生的等离子体
2008 IEEE 35th International Conference on Plasma Science Pub Date : 2011-06-26 DOI: 10.1109/PLASMA.2011.5992895
V. Bratman, Y. Kalynov, V. A. Koldanov, A. Litvak, S. Razin, A. Sidorov, V. Skalyga, V. Zorin
{"title":"Plasma creation by a powerful electromagnetic radiation of terahertz gyrotrons","authors":"V. Bratman, Y. Kalynov, V. A. Koldanov, A. Litvak, S. Razin, A. Sidorov, V. Skalyga, V. Zorin","doi":"10.1109/PLASMA.2011.5992895","DOIUrl":"https://doi.org/10.1109/PLASMA.2011.5992895","url":null,"abstract":"Summary from only given. The study of the discharge in a focused beam of terahertz radiation in argon at pressures close to atmospheric was made. The range of breakdown electric fields and gas pressures at which the discharge occurs was determined. Discharge, had started at the focus of the beam, propagated in the region of weak fields, where the value of the intensity was substantially less than the breakdown one. The investigation of the discharge glow dynamics was made and it was shown that its front had moved towards the radiation with the speed of about 105 cm/sec. The estimation of the plasma density was made on the basis of the terahertz wave transmission coefficient measurements, and the value of the density exceeded the value of 1015 cm-3. The features of the discharge excited by radiation of the terahertz frequency range and its possible applications are discussed.","PeriodicalId":6359,"journal":{"name":"2008 IEEE 35th International Conference on Plasma Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91398037","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
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