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2017 IEEE International Conference on Plasma Science (ICOPS)最新文献

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Surface Discharge Phenomena On Synthetic Ester-Pressboard Interface: Effect Of Moisture 合成酯-纸板界面表面放电现象:水分的影响
Pub Date : 2017-05-21 DOI: 10.1109/PLASMA.2017.8496076
C. Thirumurugan
The tangential component of electric field along the interface of oil and pressboard causes surface discharge (SD) or surface tracking (different stages of SD is shown in Fig. 1) which can damage the whole or part of insulation structure. Partial Discharge (PD) activity at the interface begins before full surface discharge [1]. In this work, an experimental study was conducted to characterize surface partial discharge pheno mena at synthetic-ester and pressboard interface with moistur e impurities.
电场沿油与压板界面的切向分量引起表面放电(SD)或表面跟踪(SD的不同阶段如图1所示),从而破坏整个或部分绝缘结构。界面上的局部放电(PD)活动在完全表面放电之前就开始了[1]。本文对含湿杂质的合成酯与压板界面表面局部放电现象进行了表征。
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引用次数: 0
The Effect of the Type of Gas on Underwater Discharge 气体类型对水下放电的影响
Pub Date : 2017-05-21 DOI: 10.1109/plasma.2017.8496210
Kangil Kim, J. Huh, S. Ma, Y. Hong
The atmospheric-pressure plasma has been proposed as a novel therapeutics for various field of medicine such as anticancer treatment, sterilization, and wound healing. Recent trends of plasma for medical applications focus on the interaction of liquid and reactive species generated by plasma. However, the interactions of liquid and plasma are influenced by surrounding environments such as temperature, humidity. In this work, we suggest the underwater discharge system for medical applications. The system can generate plasma in liquid using capillary electrode having gas channel. Thus, the reactive species generated by plasma interact with liquid without any outside influence and regulate generation of reactive species according to gas type. In order to ascertain the possibility of suggested system for medical applications, we analyze characteristics of underwater discharge and reactive species in water generated by plasma.
常压等离子体已被提出作为一种新的治疗方法,在各个医学领域,如抗癌治疗,灭菌和伤口愈合。等离子体医学应用的最新趋势集中在等离子体产生的液体和反应物质的相互作用上。然而,液体和等离子体的相互作用受到周围环境(如温度、湿度)的影响。在这项工作中,我们提出了水下排放系统的医疗应用。该系统利用带有气通道的毛细管电极在液体中产生等离子体。因此,等离子体产生的反应物质在没有外界影响的情况下与液体相互作用,并根据气体类型调节反应物质的产生。为了确定所建议的系统在医学上应用的可能性,我们分析了等离子体产生的水中的水下放电特性和反应物质。
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引用次数: 0
DT Neutron Yield Modeling for Staged Z-Pinch Experiments on the 1MA Zebra Machine* 在1MA Zebra机器上分阶段z夹尖实验的DT中子产率模型*
Pub Date : 2017-05-21 DOI: 10.1109/PLASMA.2017.8496088
E. Ruskov, H. Rahman, F. Wessel, P. Ney, A. Qerushi
Confinement of neutron secondaries (14.1MeV) in deuterium Z-pinch plasmas is of significant scientific and practical interest because it is similar to the confinement of 3.5MeV alpha particles produced in the fusion of deuterium and tritium nuclei. During the final Z-pinch stagnation stage, in very dense target plasmas, the alphas are expected to provide additional heating, and eventually lead to ignition.
氘- z夹缩等离子体中中子次级粒子(14.1MeV)的约束具有重要的科学和实际意义,因为它类似于氘和氚核聚变产生的3.5MeV α粒子的约束。在最后的z夹缩停滞阶段,在非常致密的目标等离子体中,α粒子预计会提供额外的加热,并最终导致点火。
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引用次数: 0
Temporal And Spatial Analysis Of Inductively Coupled Atmospheric Pressure Plasma 电感耦合大气压等离子体的时空分析
Pub Date : 2017-05-21 DOI: 10.1109/PLASMA.2017.8496077
A. Gulec, F. Bozduman, L. Oksuz, A. Hala
An atmospheric pressure inductively coupled plasma (ICP) was obtained by 13.56 MHz rf power. A 3 turn copper coil wrapped around a quartz tube 140 mm length and 16 mm inner diameter. 9 mm tungsten wire was inserted into the tube as an igniter and grounded. As a preliminary experimental study, the optical emission spectroscopy (OES) was used to obtain the electron temperature and density values of the argon plasma. In this study the atmospheric pressure ICP simulation will be carried out by COMSOL at different flow rate of argon and rf power values. The electron temperature and the density of plasma will be compared by the experimental results. Also the spatio-temporal evaluation of these parameters will be given. Rf cycle dependency of plasma parameters will be discussed.
用13.56 MHz的射频功率获得了常压电感耦合等离子体。一个3转铜线圈缠绕在石英管140毫米长,16毫米内径。将9毫米钨丝插入管中作为点火器并接地。作为初步的实验研究,利用光学发射光谱(OES)获得了氩等离子体的电子温度和密度值。在本研究中,COMSOL将对不同氩气流量和射频功率值下的大气压力进行ICP模拟。用实验结果对电子温度和等离子体密度进行比较。并对这些参数进行了时空评价。将讨论等离子体参数对射频周期的依赖性。
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引用次数: 0
Plasma Gas Cleaning Process for the Conversion of Biomass Tar Model Compounds Into Syngas* 生物质焦油模型化合物转化为合成气的等离子体气体净化过程*
Pub Date : 2017-05-21 DOI: 10.1109/PLASMA.2017.8496067
Shiyun Liu, D. Mei, Yichen Ma, X. Tu
Biomass has been highlighted as a key renewable feedstock to respond to the vital societal need for a step change in the sustainability of energy production which is required to combat climate change. Gasification of biomass wastes represents a major sustainable route to produce syngas (H2 and CO) from a source which is renewable and CO2-neutral. However, one of the major challenges in the gasification process is the contamination of the product syngas with tar which causes major process and syngas end-use problems 1. Non-thermal plasma technology provides an attractive and promising alternative to the conventional approaches for the conversion of tars into clean fuels at a relatively low temperature.1S. Liu, D. Mei, L. Wang, and X. Tu, Chemical Engineering Journal, 307, 2017, pp. 793–802.
生物质已被强调为一种关键的可再生原料,以应对应对气候变化所需的能源生产可持续性的重大社会需求。生物质废弃物的气化是一种主要的可持续途径,可以从可再生和二氧化碳中性的来源生产合成气(H2和CO)。然而,气化过程中的主要挑战之一是产品合成气被焦油污染,这导致了主要的过程和合成气最终使用问题。非热等离子体技术为在相对较低温度下将焦油转化为清洁燃料的传统方法提供了一种有吸引力和有前途的替代方法。刘德华,王磊,杜晓霞,化学工程学报,2017,pp. 793-802。
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引用次数: 0
Electrochromic Characteristics as a Function of Electrolyte on Performance of Electrochromic Films Including Plasma Modified V2O5 Hybrids 电解液对等离子体修饰V2O5杂化电致变色膜性能的影响
Pub Date : 2017-05-21 DOI: 10.1109/PLASMA.2017.8496194
E. Eren, Gamze Celik Cogal, A. Yildiz, S. Gursoy, A. Oksuz
Vanadium pentaoxide (V2O5) was widely studied as a functional of electrochromic materials (EC) in the electrochromic devices (ECDs) for the features of good transmittance modulation, good Li+ions intercalation ability. However, it represents low electrical conductivity, poor cycle reversibility. Much scientific research focused on the study of inorganic metal oxide/conducting polymer-based hybrid film due to improved electrochromic properties 1, 2.
五氧化二钒(V2O5)具有良好的透过率调制和Li+离子嵌入能力,是电致变色器件(ECDs)中广泛研究的功能材料。然而,它的电导率低,循环可逆性差。由于电致变色性能的改善,无机金属氧化物/导电聚合物基杂化膜的研究受到了很多科学研究的关注。
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引用次数: 0
Effecs of Bubble Control on Synthesis and Characterization of Carbon Nanoparticle in AC Solution Plasma 气泡控制对交流溶液等离子体中纳米碳合成及表征的影响
Pub Date : 2017-05-21 DOI: 10.1109/PLASMA.2017.8496170
Jun-Goo Shin, Hyun-Jin Kim, D. Kum, Dong Ha Kim, C. Park, H. Tae, Jeong-Hyun Seo, B. Shin
In the last few decade, carbon nanomaterials such as fullerene, carbon nanotube, and graphite have focused because of its controllable optical, electrical, thermal, and strongly physical properties 1. Therefore, various synthesis methods for obtaining carbon nanoparticle have developed in depth. Among these methods, alternating-current (AC) solution plasma method has great advantage for synthesizing carbon nanoparticles due to having simple, fast, lowtemperature, and high efficiency 2. However, carbon nanoparticles have synthesized via graphite electrode or solution containing carbon atoms. The discharge and nanoparticle properties in solution plasma device with various bubble gas compositions have not yet been studied in detail in terms of bubble gas kinds, bubble speeds, and gas mixture ratios. Accordingly, in this study, we examine to find out influences of bubble gas control on carbon material synthesis and characterization in solution plasma device. The discharge and carbon nanoparticles characteristics were examined relative to the various bubble conditions such as bubble gas kinds, bubble speeds, and gas mixture ratios in solution plasma device. More researches on AC solution plasma physics and properties of carbon nanomaterials will be carried out in detail.
在过去的几十年里,碳纳米材料如富勒烯、碳纳米管和石墨因其可控的光学、电学、热学和强大的物理特性而备受关注。因此,获得纳米碳颗粒的各种合成方法得到了深入发展。其中,交流(AC)溶液等离子体法具有简单、快速、低温、高效等优点。然而,碳纳米颗粒是通过石墨电极或含有碳原子的溶液合成的。不同气泡气体组成的溶液等离子体装置的放电和纳米粒子特性在气泡气体种类、气泡速度和气体混合比方面尚未得到详细的研究。因此,在本研究中,我们研究了气泡气体控制对溶液等离子体装置中碳材料合成和表征的影响。在溶液等离子体装置中,研究了不同气泡条件(气泡气体种类、气泡速度和气体混合比)对碳纳米颗粒放电特性的影响。在交流溶液等离子体物理和碳纳米材料性能方面将进行更多的详细研究。
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引用次数: 0
Measurements Of Gas Temperature In Microwave Plasma At Atmospheric Pressure By Molecular Emission Spectrometry 用分子发射光谱法测量常压微波等离子体中的气体温度
Pub Date : 2017-05-21 DOI: 10.1109/PLASMA.2017.8496270
Lei Deng, Guixin Zhang, Cheng Liu, Hong Xie
In this study, gas temperature measurements of argon, nitrogen, and air microwave plasma are achieved by the molecular emission spectrometry of the $A^{2} sum ^{+} rightarrow X^{2} prod _{r}$ electronic system of OH radical[1, 2], and the gas temperatures at different microwave power and gas flow rate are explored, the axial temperature distributions of nitrogen and air microwave plasma plume are measured. The experimental results show that the microwave plasma core temperature is higher than 2000 K at different working conditions, even up to over 6000 K in air microwave plasma. At the same working condition, the three kind of microwave plasma gas temperature meet $T_{Ar}, lt T_{N2}, lt T_{Air}$. The gas temperature increases slightly with the increase of microwave power, decreases slightly with the decrease of gas flow overall. The gas temperature of nitrogen and air microwave plasma plume reduces quickly along the axial direction. In order to verify the accuracy of molecular emission spectrometry, the thermocouple is used as a comparison to measure the temperature of the DBD argon plasma. Experiments show that the temperature measurement results of molecular emission spectrometry and thermocouple are very consistent.
本研究通过OH自由基$A^{2} sum ^{+} rightarrow X^{2} prod _{r}$电子系统的分子发射光谱法实现了氩气、氮气和空气微波等离子体的气体温度测量[1,2],探索了不同微波功率和气体流速下的气体温度,测量了氮气和空气微波等离子体羽流的轴向温度分布。实验结果表明,在不同的工作条件下,微波等离子体的核心温度均高于2000k,空气微波等离子体的核心温度最高可达6000 K以上。在相同的工作条件下,三种微波等离子体气体温度满足$T_{Ar}, lt T_{N2}, lt T_{Air}$。随着微波功率的增加,气体温度略有上升,随着气体总流量的减小,气体温度略有下降。氮气和空气微波等离子体羽流的气体温度沿轴向迅速降低。为了验证分子发射光谱法的准确性,采用热电偶作为对比,测量了DBD氩等离子体的温度。实验表明,分子发射光谱法测温结果与热电偶测温结果非常吻合。
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引用次数: 0
Spectroscopic Measurements of the Formation of a Conical Section of Spherically Imploding Plasma Liners* 球体内爆等离子体衬里锥形截面形成的光谱测量*
Pub Date : 2017-05-21 DOI: 10.1109/PLASMA.2017.8496120
S. Langendorf, S. Hsu, J. Dunn, K. Yates, M. Gilmore, J. Cassibry, K. Schillo, R. Samulyak, W. Shih
The Plasma Liner Experiment-ALPHA (PLX-α) is investigating the merging of supersonic plasma jets into a spherically imploding plasma liner as a driver for use in magneto-inertial fusion (MIF) architectures. 1 The present work is focused on characterizing the merging of six and/or seven plasma jets, converging in a cone of solid angle $0.4 pi $ over a distance of 1.3 meters. Results from high-speed imaging, photodiode arrays, self-emission visible survey spectroscopy, and self-emission visible high-resolution spectroscopy will be presented, yielding measurements of plasma velocity, number density, electron/ ion temperatures, and mean ionization state pre- and post-merge. Anticipated plasma parameter regimes are $mathrm {n}sim 10 ^{15}-10 ^{17}$ cm$^{-3}$, $mathrm {T}sim 1-10$ eV, and $mathrm {v}sim 50$ km/s, with gas species varied among argon, nitrogen, neon, krypton, and xenon. Images and spectra will be compared with synthetic data generated from 3D fronttracking and smooth-particle-hydrodynamic simulations coupled with atomic physics / opacity analysis codes. Results will inform questions of liner-Mach-number and lineruniformity evolution throughout the jet-merging and subsequent liner-convergence process.
等离子体衬垫实验- alpha (PLX-α)正在研究超音速等离子体射流合并到球体内爆等离子体衬垫中,作为磁惯性聚变(MIF)体系结构的驱动器。目前的工作重点是描述六个和/或七个等离子体射流的合并,在1.3米的距离上以立体角$0.4 pi $的锥形聚集。将展示高速成像、光电二极管阵列、自发射可见光巡天光谱和自发射可见光高分辨率光谱的结果,产生等离子体速度、数量密度、电子/离子温度和合并前后的平均电离状态的测量结果。预期的等离子体参数范围为$mathrm {n}sim 10 ^{15}-10 ^{17}$ cm $^{-3}$、$mathrm {T}sim 1-10$ eV和$mathrm {v}sim 50$ km/s,气体种类包括氩、氮、氖、氪和氙。图像和光谱将与3D前沿跟踪和光滑粒子流体动力学模拟以及原子物理/不透明度分析代码生成的合成数据进行比较。结果将为整个射流合并和随后的线性收敛过程中的线性马赫数和线性均匀性演变提供信息。
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引用次数: 0
Effect Of Cold Plasma Processing On Sweet Basil And The Biochemistry Of Its Essential Oils 冷等离子体加工对甜罗勒及其精油生化的影响
Pub Date : 2017-05-21 DOI: 10.1109/PLASMA.2017.8496320
G. Buonopane, C. Antonacci, J. López
This interdisciplinary research project, which focuses on the emerging field of plasma agriculture, seeks to better understand the chemical and physical effects of cold plasma processing on plants and their essential oils. Cold plasma processing has been shown to be a rapid, economical, and pollution-free method to improve plant seed performance and crop yield [1]. Essential oils are aromatic oily liquids extracted from different parts of plants, such as the leaves, flowers, and roots. Among the various beneficial properties of essential oils is their demonstrated antioxidant effect [2], [3] directly applicable to foods that are prone to oxidative consequences such as poor flavor, bad odors, and spoilage. Antioxidants, either synthetic (e.g., butylated hydroxytoluene, BHT) or natural (e.g., Vitamin C), are routinely added to processed foods to inhibit or delay oxidation. Essential oils are examples of natural antioxidants. Although synthetic antioxidants like BHT and BHA (butylated hydroxyanisole) are very effective, they have been shown to be potentially harmful to human health with demonstrated evidence of causing cancer in laboratory animals [3]. As a result, food scientists have been seeking alternative natural compounds as substitute antioxidants, such as essential oils. We have observed a growth effect in our preliminary studies treating basil plants with cold plasmas. We have also observed that plasma treatment increases the antioxidant activity of essential oils. Our preliminary work further revealed a difference in the composition of individual antioxidant components between the plasma-treated and non-plasmatreated basil. Following up on our preliminary research, our present investigation sought to better understand cold plasma's physical and biochemical-molecular effects on basil plants. These latter findings are the focus of this presentation.
这个跨学科研究项目的重点是等离子农业这一新兴领域,旨在更好地了解冷等离子体处理对植物及其精油的化学和物理影响。冷等离子体处理已被证明是一种快速、经济、无污染的提高植物种子性能和作物产量的方法[1]。精油是从植物的不同部位提取的芳香油性液体,如叶子、花和根。在精油的各种有益特性中,它具有明显的抗氧化作用[2],[3],直接适用于容易产生氧化后果的食品,如差味、异味和变质。抗氧化剂,无论是合成的(如丁基羟基甲苯,BHT)还是天然的(如维生素C),通常被添加到加工食品中以抑制或延缓氧化。精油是天然抗氧化剂的例子。虽然合成抗氧化剂如BHT和BHA(丁基羟基茴香醚)非常有效,但它们已被证明对人类健康有潜在危害,在实验动物中有证据表明它们会致癌[3]。因此,食品科学家一直在寻找替代天然化合物作为抗氧化剂的替代品,比如精油。在低温等离子体处理罗勒植株的初步研究中,我们已经观察到一种生长效应。我们还观察到,血浆处理增加了精油的抗氧化活性。我们的初步工作进一步揭示了等离子处理和未等离子处理罗勒之间个体抗氧化成分的组成差异。在前期研究的基础上,本研究旨在更好地了解冷等离子体对罗勒植物的物理和生化分子效应。后一种发现是本报告的重点。
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引用次数: 2
期刊
2017 IEEE International Conference on Plasma Science (ICOPS)
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