Scheduled System Maintenance:
Some services will be unavailable Sunday, March 29th through Monday, March 30th. We apologize for the inconvenience.
By Topic

Plasma Science, IEEE Transactions on

Issue 8 • Date Aug. 2010

Filter Results

Displaying Results 1 - 25 of 25
  • Table of contents

    Publication Year: 2010 , Page(s): C1 - 1981
    Save to Project icon | Request Permissions | PDF file iconPDF (46 KB)  
    Freely Available from IEEE
  • IEEE Transactions on Plasma Science publication information

    Publication Year: 2010 , Page(s): C2
    Save to Project icon | Request Permissions | PDF file iconPDF (38 KB)  
    Freely Available from IEEE
  • Gas Temperature Effect on Discharge-Mode Characteristics of Atmospheric-Pressure Dielectric Barrier Discharge in a Helium–Oxygen Mixture

    Publication Year: 2010 , Page(s): 1982 - 1990
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1373 KB) |  | HTML iconHTML  

    For a better understanding of gas temperature effects on plasma characteristics, a numerical study has been carried out for a dielectric barrier discharge (DBD) with a helium-oxygen mixture at atmospheric pressure. A one-dimensional time-dependent simulation code has been developed to solve continuity equations for plasma species and Poisson's equation for electric field calculation for a parallel-plate DBD reactor. To include temperature effects, gas heating by enthalpy change and Joule heating with ionic current movement are considered in the helium-oxygen plasma including 13 species reacting with one another according to 34 reactions depending on the gas temperature. Varying the ambient temperature from 300 K to 500 K, the plasma characteristics are calculated for the temporal variations and spatial distributions of electric field and species densities in the DBD region, and the different features of discharge modes are described by the voltage-current characteristic curves. A glowlike mode, which typically shows the formation of cathode fall, Faraday dark space, negative glow, and positive column in the spatial distributions of electric field and plasma density, is found in the discharge at a low ambient temperature, while a Townsend discharge mode with moderate electric field intensity and lower electron density is characterized at higher ambient temperatures. The temperature-dependent reactions strongly influence the generation and loss of species in the DBD plasma, and the decomposition of O3 into O or O2 and the quenching of metastable helium by the resultant O or O2 play an important role in determining the distinct discharge mode in the DBD of a He-O2 mixture. Furthermore, it is understood that the discharge-mode transition is controllable by the coupled effects of oxygen additive concentration, frequency, and gas temperature. A small amount of O2 additive or a high-frequency operation exhibits a glow- - mode in a specific range of ambient temperature, of which reason can be explained by density variation and quenching of helium metastable species caused by the produced oxygen-related species. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Study of MHD Surface Waves Along a Static Plasma Slab Surrounded by Moving Plasma and Neutral Gas

    Publication Year: 2010 , Page(s): 1991 - 1996
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (270 KB) |  | HTML iconHTML  

    The steady flow of plasma along a structured atmosphere may cause the enhancement of existing surface modes and the generation of new surface wave (SW) modes. This paper discusses the dispersion characteristics of magnetohydrodynamic SWs along a stationary incompressible plasma slab surrounded by moving incompressible plasma and neutral gas. The dispersive curves for sausage and kink modes are also discussed. The result may help in studying more complicated cases. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Microwave Multipactor Breakdown Between Two Cylinders

    Publication Year: 2010 , Page(s): 1997 - 2005
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (280 KB) |  | HTML iconHTML  

    An analysis has been made of the microwave breakdown threshold for multipactor in an open structure comprising two parallel cylinders, approximating, e.g., parts of a helix antenna. The electron motion in the corresponding electromagnetic field is analyzed by separating the motion into a slowly varying drift velocity (driven by the ponderomotive force due to the electric field inhomogeneity) and a rapidly oscillating part (driven by the oscillating electric field). Furthermore, the curvature of the cylindrical surfaces of emission is shown to give rise to a new effect that implies a loss of electrons. This leads to a more stringent multipactor breakdown condition for the two-wire structure than for the classical situation corresponding to the case of two plane parallel infinite plates. The importance of this effect is determined by the ratio of the cylinder radii and the distance between the cylinders, and it is shown that when this ratio is small, multipactor can only occur for surfaces having very large secondary emission coefficients. A detailed analysis is also made to determine the lowest voltage between the cylinders at which multipactor becomes possible. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reflection of Electromagnetic Wave Using a Plasma Sheet

    Publication Year: 2010 , Page(s): 2006 - 2009
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (409 KB) |  | HTML iconHTML  

    A stable plasma sheet with an area of 250 × 300 mm2 was generated between two different pairs of electrode models, a pair of hollow electrodes discharge model, a single hollow cathode, and a metal plate anode discharge model, by direct current discharge under an axial magnetic field. The electron density distribution across the sheet plasmas in the two different discharge models were compared by the measurements using Langmuir probe. The results showed that the electric field configuration of the pair of hollow electrodes discharge model was more effective to confine the electrons and showed higher electron density in the sheet plasma. The microwave return loss of the sheet plasma had been studied by using a microwave scale network analyzer and the sheet plasma exhibited almost the same reflection capability with an aluminum plate in a microwave range of 2.2 to 4 GHz, which indicated that the sheet plasma with high electron density could be used to reflect electromagnetic wave, and hopefully replace metal plate antenna. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Loss of Magnetic Insulation in a Crossed-Field Diode: Ion and Collisional Effects

    Publication Year: 2010 , Page(s): 2010 - 2015
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (161 KB) |  | HTML iconHTML  

    The effect of ion production through ionizing collisions in a magnetically insulated crossed-field gap is studied by using one-dimensional particle-in-cell software. These results are compared with the predictions from previous efforts that assumed immobile sheets of positive charge at different positions within the gap. Our results with mobile ions created via collisions indicate that the diode can lose magnetic insulation of the electron flow at ion densities lower than that predicted from the immobile ion case. Furthermore, we observe that electron scattering plays a significant role in this gap closure. This loss of insulation depends on the background pressure and leads to time-dependent migration of charge across the gap. We characterize both the time-scale and the degree of current transport for cases relevant to the high-power microwave community. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Superradiant Undulator Radiation of Periodic Intense Electron Bunches in a Cavity

    Publication Year: 2010 , Page(s): 2016 - 2020
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (169 KB) |  | HTML iconHTML  

    Considered is superradiant undulator radiation emitted at grazing resonance by intense electron bunches periodically injected into a resonating cavity. Compared to a single bunch in a long waveguide, cumulative interaction of periodic bunches in a cavity allows much higher saturated efficiency induced by superradiant stimulated emission of radiation. Simulations in the saturation regime show that the self-field of intense bunches tends to reduce the efficiency by obstructing nonlinear bunching. When energy gain is balanced by cavity loss, the emitted radiation finds a steady state in which the radiation pulse persists with no dispersion. At that state, the cavity works as a stable oscillator, supplying periodic bursts of radiation via output coupling. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Behavior of Charge Inertia Battery in Commutation Process of Variable-Polarity Welding Arc

    Publication Year: 2010 , Page(s): 2021 - 2026
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (592 KB) |  | HTML iconHTML  

    Based on research of a variable-polarity welding arc, the phenomenon in which the time lagging in the zero crossing of the current compared to that of the voltage in the process of commutation was investigated. The effect of a “charge inertia battery” existing in the commutation process of a variable-polarity welding arc is proposed. It is presented that the current can be driven to maintain the former direction after voltage reversion due to the effect of the proposed charge inertia battery. The principle and characteristics of the charge inertia battery are analyzed, and its effect on the stability of the variable-polarity welding arc is discussed. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Low-Pressure Dynamical Glow Discharge With Electrolytic Cathode in the Form of Aqueous Solution of \hbox {NaHCO}_{3}

    Publication Year: 2010 , Page(s): 2027 - 2030
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (540 KB) |  | HTML iconHTML  

    Video images of a low-pressure dc glow discharge with an electrolytic cathode in the form of aqueous solution of sodium bicarbonate NaHCO3 are presented in this paper. Various forms of the discharge are observed. One of the discharge forms-a dc glow discharge with a foam cathode-was recorded for the first time. A space-time diagram of the discharge is drawn. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Numerical Model of Current–Voltage Curve for the Wire-Cylinder Electrostatic Precipitators in Negative Voltage in the Presence of Nonpolar Gases

    Publication Year: 2010 , Page(s): 2031 - 2040
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (546 KB) |  | HTML iconHTML  

    The aim of this paper is to develop a numerical model that takes into account the share of the electric current produced by free electrons when an electrostatic precipitator (ESP) with a wire-cylinder geometry is supplied with a negative voltage and the carrier gas is nonpolar. This model improves the understanding of ESPs and highlights the parameters that affect the process behavior and the generation of free electrons. It takes into account the current stemming from the presence of free electrons. For this reason, a coefficient was developed and was expressed as a function of the temperature, pressure, and composition of the carrier gas. Experimental results obtained by other authors and laboratory measurements were compared with the model. The set of results showed that the numerical model developed in this paper is valid only in the presence of nonpolar gases. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Describing and Correlating the Performance of the Thermionic Converter: A Historical Perspective

    Publication Year: 2010 , Page(s): 2041 - 2047
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (352 KB) |  | HTML iconHTML  

    A historical perspective relating to the description and correlation of thermionic-converter performance is presented. Evaluation of electrode materials, early methods of performance comparisons, plasma arc-drop correlations, and the development of the barrier index are discussed. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Transport Coefficients of Lightning Discharge Plasma on Plateau Area in China

    Publication Year: 2010 , Page(s): 2048 - 2051
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (168 KB) |  | HTML iconHTML  

    According to the four spectra of a cloud-to-ground lightning discharge, channels have been captured by a slitless spectrograph in Qinghai and Tibet plateau, the electrical conductivities are calculated, and, for the first time, the electron thermal conductivities and the electron thermal diffusivities are calculated by applying the transport theory of air plasma to the lightning channels. The results are compared with existing values, and in general, they are in satisfactory agreement. These transport characteristic parameters have added important value for further research on the transport characteristic of the current and energy of the lightning discharge channel. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the Optimization for Enhanced Dual-Pulse Laser-Induced Breakdown Spectroscopy

    Publication Year: 2010 , Page(s): 2052 - 2055
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (342 KB) |  | HTML iconHTML  

    We present a systematic study on the optimization of the following: 1) interpulse delay; 2) the pulse energies ratio; and 3) the combination of laser wavelengths to achieve the signal enhancement in double-pulse laser-induced breakdown spectroscopy (LIBS) on magnesium target using two Nd:YAG lasers in collinear configuration. More than 350 times signal intensity enhancement is achieved in the neutral magnesium lines on an appropriate combination of laser wavelengths with the optimized values of the interpulse delay and the laser pulse energies ratio. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Experimental Investigation of Arc Plasma in GaInSn Liquid Metal Current-Limiting Device

    Publication Year: 2010 , Page(s): 2056 - 2061
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (864 KB) |  | HTML iconHTML  

    This paper focuses on an experimental investigation of arc plasma in a liquid metal current-limiting device based on pinch effect. A specially designed experimental setup is employed to observe the dynamic process of arc initiation and arc evolution. From the frames obtained by high-speed photography, the mechanism of arc initiation is revealed. It indicates that the arc ignites due to the self-pinch effect, which starts from the free surface of liquid metal and develops in the form of gas cavities. According to the analysis of the subsequent stage after arc ignition, it can be concluded that the arc plasma should be a mixture of metal vapor and air. With the morphological changes of the arc, the arc evolution can be classified into four stages. The arc erosion on electrodes is observed during the arc process, and its causes are analyzed in detail. Using a liquid metal current-limiting device, the arc characteristics during the current limitation are investigated. It is found that the duration of the prearcing stage and the arc voltage are influenced by the pass-through current. As prospective current increases, the prearcing time reduces because of the acceleration of the pinch process and the arc voltage rise due to the adequate arc burning. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Compensated Monte Carlo Collision Model for Particle-in-Cell Simulation in High-Pressure Plasmas

    Publication Year: 2010 , Page(s): 2062 - 2068
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (496 KB) |  | HTML iconHTML  

    The Monte Carlo collision (MCC) model is widely adopted to simulate discharge plasmas using the particle-in-cell (PIC) method; however, it has low efficiency in high-pressure plasmas because of the small time steps required due to the constraint of high collision frequency. To relax this time step constraint, a compensated Monte Carlo collision model (CMCC) is proposed which considers multiple collisions in a time step as a series of single collisions to compensate for the neglected collisions. The electron motion in a high-pressure He gas for various reduced electric fields E/N and the streamer formation process in a laser-triggered spark gap were simulated using the CMCC model. Simulation results showed that the CMCC model with long time step obtained reasonable electron velocity distribution, temperature, drift velocity, plasma density, and space-charge field. It was demonstrated that the CMCC model had high accuracy and high efficiency, particularly for PIC simulation in high-pressure plasmas. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Effect of the Drive Parameter on the Differential Fusion Products in Plasma Focus Devices

    Publication Year: 2010 , Page(s): 2069 - 2073
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (299 KB) |  | HTML iconHTML  

    A moving-boiler model is employed to study the branching ratio of two D-D reaction channels in plasma focus (PF) devices. This model is based on the thermal spreading of the pinched plasma toward the axial direction of the device. In this way, the experimental fusion cross sections of D(d, n)3He and D(d, p)3H reactions are used to calculate the velocity-averaged cross sections due to the penetration of the confined particles into the thermal boiler. The results obtained represent an indispensable effect of the drive parameter on the differential fusion yields. Obviously, an increment of the drive parameter has a high impact on the yields. However, this impact is dominantly in favor of proton yield particularly at lower drift velocity. Furthermore, a saturated condition is obtained at high drift velocity of the boiler. These facts are important for the optimization of fusion emissions in PFs for future applications, particularly in the field of short-lived radioisotope production. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Special issue of invited papers from the 37th International Conference on Plasma Science (ICOPS 2010)

    Publication Year: 2010 , Page(s): 2074
    Save to Project icon | Request Permissions | PDF file iconPDF (105 KB)  
    Freely Available from IEEE
  • Call for PPST Awards

    Publication Year: 2010 , Page(s): 2075
    Save to Project icon | Request Permissions | PDF file iconPDF (315 KB)  
    Freely Available from IEEE
  • Special issue on applications and numerical simulation of plasma-based surface modification

    Publication Year: 2010 , Page(s): 2076 - 2077
    Save to Project icon | Request Permissions | PDF file iconPDF (176 KB)  
    Freely Available from IEEE
  • Special issue on images in plasma science

    Publication Year: 2010 , Page(s): 2078
    Save to Project icon | Request Permissions | PDF file iconPDF (654 KB)  
    Freely Available from IEEE
  • Access over 1 million articles - The IEEE Digital Library [advertisement]

    Publication Year: 2010 , Page(s): 2079
    Save to Project icon | Request Permissions | PDF file iconPDF (370 KB)  
    Freely Available from IEEE
  • Quality without compromise [advertisement]

    Publication Year: 2010 , Page(s): 2080
    Save to Project icon | Request Permissions | PDF file iconPDF (324 KB)  
    Freely Available from IEEE
  • IEEE Transactions on Plasma Science information for authors

    Publication Year: 2010 , Page(s): C3
    Save to Project icon | Request Permissions | PDF file iconPDF (37 KB)  
    Freely Available from IEEE
  • Affiliate Plan of the IEEE Nuclear and Plasma Sciences Society

    Publication Year: 2010 , Page(s): C4
    Save to Project icon | Request Permissions | PDF file iconPDF (18 KB)  
    Freely Available from IEEE

Aims & Scope

IEEE Transactions on Plasma Sciences focuses on plasma science and engineering, including: magnetofluid dynamics and thermionics; plasma dynamics; gaseous electronics and arc technology.

 

 

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Steven J. Gitomer, Ph.D.
Senior Scientist, US Civilian Research & Development Foundation
Guest Scientist, Los Alamos National Laboratory
1428 Miracerros Loop South
Santa Fe, NM  87505  87505  USA
tps-editor@ieee.org
Phone:505-988-5751
Fax:505-988-5751 (call first)