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Plasma Science, IEEE Transactions on

Issue 10 • Date Oct. 2010

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  • Table of contents

    Publication Year: 2010 , Page(s): C1 - 2801
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    Freely Available from IEEE
  • IEEE Transactions on Plasma Science publication information

    Publication Year: 2010 , Page(s): C2
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  • Oblique Reflection of Solitons in an Inhomogeneous Plasma: Effect of Trapped Electrons

    Publication Year: 2010 , Page(s): 2802 - 2811
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (252 KB) |  | HTML iconHTML  

    This paper aims at studying the oblique reflection of solitons in an inhomogeneous plasma having finite-temperature ions and trapped electrons (two-temperature nonisothermal electrons). In order to study the soliton reflection, a coupled equation is derived based on modified Korteweg-deVries equations for the incident and reflected solitons, and then, it is solved along with the use of incident soliton solution. The expressions for the reflected soliton amplitude, width, and reflection coefficient are obtained and examined for different parameter regimes. The reflection coefficient, which is the ratio of reflected and incident soliton amplitudes, is found to be independent of the ion and electron temperatures. It infers that both the amplitudes change in the same proportion with the ion and electron temperatures. It is observed that the soliton reflects with higher amplitude when the obliqueness is smaller. It is also seen that the reflected soliton undergoes a downshift in its original line of propagation. This downshift is further investigated in detail. The effect of the trapped electrons on the soliton reflection characteristics and on the downshift is also analyzed. View full abstract»

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  • The Theoretical Study of Semiconductor-Bridge Dynamic Resistance

    Publication Year: 2010 , Page(s): 2812 - 2818
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (472 KB) |  | HTML iconHTML  

    The semiconductor bridge (SCB) is a heavily n-doped semiconductor. The SCB device has advantages for reducing voltage and energy requirements compared with a conventional device. It also has very excellent safety. When driven with a short low-energy pulse, the SCB creates hot plasma to ignite energetic materials. The hot plasma permeates the energetic materials and deposits its latent heat of fusion to the grains, thereby heating the granular surfaces to energy states required for self-sustained reaction. The behavior of the SCB can be facilitated through the simulation of the electrical components. The resistance of the SCB is a key parameter during the process of producing the plasma. The dynamic resistance of a heavily doped semiconductor resistor was evaluated by observing the electrical mobility and conductivity of the resistor as a function of temperature covering the range from room temperature to the plasma temperature. In an effort to elucidate the dynamic resistance of the SCB, current was forced to flow through the bridge with an initial resistance of 1 Ω. The energy stored in a 25-μF capacitor was used to activate the plasma. Two peaks in the voltage-time curve were typically observed. Time histories of the resistance and voltage show the special features of the resistor. It appears that the resistance increases initially before the intrinsic temperature and then decreases due to negative resistance behavior, and then, the resistor is melted and vaporized to generate plasma. View full abstract»

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  • S-Band Coaxial Vircator With Electron Beam Premodulation Based on Compact Linear Transformer Driver

    Publication Year: 2010 , Page(s): 2819 - 2824
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (862 KB) |  | HTML iconHTML  

    A two-section coaxial vircator with radial electron beam injection and electrodynamic feedback was developed. The use of electron beam premodulation in the vircator allows an increase in efficiency and ensures single-mode oscillation. The vircator operates with no external magnetic field, features a comparatively low operating impedance of the vacuum diode (10-15 Ω), and makes feasible wide-band frequency tuning through varying the resonator parameters. The vircator was simulated using the PIC-code KARAT. It is shown that, in a wide range of electron beam power (10-25 GW), the oscillation efficiency is 12%-15% and the frequency tuning bandwidth is 15 %. In the experiments on a compact linear transformer driver at a cathode voltage of 300 kV, diode current of 20 kA, and driving pulse duration of 250 ns, the single H11 mode oscillation at 2.2 GHz with a 300-MW microwave peak power and 130-ns pulse duration at half the power level was realized. View full abstract»

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  • Principles of Synthesis of Multimode Waveguide Units

    Publication Year: 2010 , Page(s): 2825 - 2830
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (169 KB) |  | HTML iconHTML  

    We propose principles which represent a systematic approach to the synthesis of multimode waveguides converting a specific input field into a different output field. Using these principles, fast and efficient methods of synthesis with specified properties can be constructed for any field analysis method. Several new methods of synthesis for most important applications are offered, and synthesized waveguide components are presented to demonstrate their efficiency. View full abstract»

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  • PIConGPU: A Fully Relativistic Particle-in-Cell Code for a GPU Cluster

    Publication Year: 2010 , Page(s): 2831 - 2839
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (499 KB) |  | HTML iconHTML  

    The particle-in-cell (PIC) algorithm is one of the most widely used algorithms in computational plasma physics. With the advent of graphical processing units (GPUs), large-scale plasma simulations on inexpensive GPU clusters are in reach. We present an implementation of a fully relativistic plasma PIC algorithm for GPUs based on the NVIDIA CUDA library. It supports a hybrid architecture consisting of single computation nodes interconnected in a standard cluster topology, with each node carrying one or more GPUs. The internode communication is realized using the message-passing interface. The simulation code PIConGPU presented in this paper is, to our knowledge, the first scalable GPU cluster implementation of the PIC algorithm in plasma physics. View full abstract»

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  • Analysis and Application of a Parallel E-Class Amplifier as RF Plasma Source

    Publication Year: 2010 , Page(s): 2840 - 2847
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (613 KB) |  | HTML iconHTML  

    The design and construction of a 13.56-MHz RF power amplifier has been carried out on the basis of a modified resonant LC circuit in parallel regarding to the classic E-class amplifier LC series resonant circuit; this was done in order to take advantage of the operation characteristics of the resonant capacitor as a bidirectional voltage source. Therefore, the parallel LC circuit amplifies the voltage signals which can be applied to resistive or capacitive-resistive loads without the need for an impedance matching network, conventionally used with plasma generators. The main achievement of the described instrumentation lays in its constant response under a wide interval of load impedance. This facility has been applied to the generation of steady discharges in plasma needle appliances and both parallel plate and coaxial dielectric barrier discharge (DBD) reactors. Some relevant results of the DBD sterilization of four different kinds of microorganisms are included, showing the feasibility of the technique within reduced processing times, under 80 s in all the cases. View full abstract»

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  • The Velocity Characteristics of a Serial-Staged EHD Gas Pump in Air

    Publication Year: 2010 , Page(s): 2848 - 2853
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (321 KB) |  | HTML iconHTML  

    The application of the ionic wind in the fields of aerodynamic control and heat transfer is limited by its low velocity and small active area. This paper deals with the experimental and theoretical analysis of the ionic-wind velocity in serial-staged electrohydrodynamic gas pumps under a negative corona discharge in air. Each stage consists of a pair of needle array-to-ring or needle array-to-mesh electrodes. It was observed that the active area of the gas pump can be enlarged by using a needle array electrode where the negative corona discharge started simultaneously and that the needle array-to-mesh electrode can generate a higher ionic wind velocity compared to that of the needle array-to-ring electrode. The flow velocity of the ionic wind is dependent on both the number of serial stages and the pressure loss. A maximum average flow velocity of 7.39 m/s, volumetric flow rate of 140 L/min, and energy conversion efficiency of 0.8% were achieved experimentally in this paper. View full abstract»

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  • Decolorization of Aqueous Acid Red B Solution During the Cathode Process in Abnormal Glow Discharge

    Publication Year: 2010 , Page(s): 2854 - 2859
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    This paper investigated some chemical and physical factors which probably affect the decolorization of aqueous acid red B solution by atmospheric abnormal glow discharge. When the aqueous solution served as the cathode, effective decolorization occurred in the inert gas discharges as well as in the active gas discharges. The hydroxyl radicals were mainly responsible for the decolorization in the solution phase. The gas ionization potential may influence the decolorization effect. View full abstract»

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  • Luminance and Luminous Efficacy Improvement of Mercury-Free Flat Fluorescent Lamp With Arclike Electrode

    Publication Year: 2010 , Page(s): 2860 - 2866
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    A mercury-free flat fluorescent lamp with an arclike electrode is developed to improve luminance and luminous efficacy and to prevent discharge contraction. The influences of the rising time of a driving waveform and the gas mixture under different gas pressures on luminance and luminous efficacy are studied. The experimental results show that the luminance and luminous efficacy increase as the gas pressure and Xe content increase. The luminance of about 7500 cd/m2 can be achieved at a pressure of 60 kPa with Ne-Xe (30%). The maximum luminous efficacy of the system, including the inverter, is about 23.7 lm/W at a pressure of 50 kPa with Ne-Xe (30%). Compared with the gas mixture of Ne-Xe (30%), when the gas mixture of Ne-Xe (32%)-He (8%) is used, the luminance and ignition voltage increase. In addition, the luminous efficacy for a steep rising edge of a waveform within 400 ns can be increased about 10% higher than that for a gradual rising edge above 800 ns. View full abstract»

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  • Recent Advances in the Development of X-Ray Cameras Inserted Inside a Pressurized Box for LMJ Plasma Diagnostics

    Publication Year: 2010 , Page(s): 2867 - 2872
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    For the first plasma diagnostics to be deployed at the Laser Megajoule (LMJ), the Commissariat à l'Energie Atomique (CEA) is developing ultrafast x-ray imaging cameras to analyze spatial and temporal evolution of laser-plasma interaction parameters. These cameras, which operate in the target chamber vacuum, are composed of a one-dimensional (1-D) streak or a two-dimensional (2-D) gated detector, power supply units, control electronic modules, and a charge-coupled device (CCD) readout system. In order to optimize their definition and to ensure easy maintenance, these cameras are packaged inside a hermetically sealed chamber comprised of a pressurized box (air box), which also enable the electronics to operate at atmospheric pressure and provide protection of the camera against the harsh operating environment induced by fluxes of neutrons, x-rays and gamma rays, and electromagnetic radiations. This paper introduces the work led by CEA concerning the development of the air box which integrates the x-ray streak and framing cameras for the first LMJ plasma diagnostics experiments, with regard to the integration and operational constraints of the facility. View full abstract»

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  • Target-Plasma Expansion Induced by 20-MeV Intense Electron Beam

    Publication Year: 2010 , Page(s): 2873 - 2876
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    The typical response of an X-ray converter material to the passage of a high-current relativistic electron beam is ionization and rapid dispersal. Experiments have been performed on the Dragon-I linear induction accelerator to study this phenomenon. In this paper, we report the fast photography and Faraday cup experiments performed to quantify the plasma-plume expansion and velocities of ions. Monte Carlo simulation shows that the energy deposition in a multilayer target is about 7 kJ/g. By solving the Saha equation, the ionization degree of the plasma was figured out to be only 14%. View full abstract»

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  • A Novel High-Voltage Pulsed-Power Supply Based on Low-Voltage Switch–Capacitor Units

    Publication Year: 2010 , Page(s): 2877 - 2887
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1559 KB) |  | HTML iconHTML  

    This paper presents a high-voltage pulsed-power system based on low-voltage switch-capacitor units that are connected to a current source for several applications such as plasma systems. A modified positive buck-boost converter topology is used to utilize the current source concept, and a series of low-voltage switch-capacitor units is connected to the current source in order to provide a high voltage with a high voltage stress (dv/dt) as demanded by the loads. This pulsed-power converter is flexible in terms of energy control because the stored energy in the current source can be adjusted by changing the current magnitude to significantly improve the efficiency of various systems with different requirements. The output-voltage magnitude and stress (dv/dt) can be controlled by a proper selection of components and control algorithm to turn on and off the switching devices. View full abstract»

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  • Operation of Pulse-Charged Spark Gap Triggered by GaAs Photoconductive Semiconductor Switch

    Publication Year: 2010 , Page(s): 2888 - 2893
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (380 KB) |  | HTML iconHTML  

    The operation of a pulse-charged spark gap that is triggered by gallium arsenide (GaAs) photoconductive semiconductor switches (PCSSs) was investigated. By measuring the currents with the streamer discharge, we analyzed the mechanisms of breakdown between the semi-insulating GaAs PCSS and the spark gap. Two similar combination setups were studied by different gap structures. It was shown that the PCSS was a good candidate for generating high current (as high as 5.6 kA) or ultrafast pulse with 220-ps rise time and 400-ps full-width at half-maximum accompanied with good reproducibilities of waveforms. View full abstract»

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  • Model Analysis of Electric Fields Induced by High-Voltage Pulsing in Cylindrical Nerves

    Publication Year: 2010 , Page(s): 2894 - 2900
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (201 KB) |  | HTML iconHTML  

    A cylindrical dielectric model is used to compute transmembrane potential changes and evaluate the axial electric field magnitudes produced within a nerve by a high-intensity relatively short electrical pulse. For concreteness, the pulse was taken to have a duration of about 700 ns and large current magnitudes in keeping with ongoing experimental studies within our group. Interest in this quantitative analysis arises from probing the possibility of triggering bioeffects at intracellular organelles in tissues (or even whole animals) through such electric stimulation. Almost all other studies have focused on simple spherical cells. This paper provides a theoretical framework for computing electric fields (especially the axial components) within such cylindrical geometries (e.g., nerve cells). It is shown that fields can become sufficiently high within microseconds and initiate electroporation, modulate electrochemical processes (e.g., calcium release), or trigger secondary biochemical effects depending on the electrical pulsing parameters. View full abstract»

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  • A High-Voltage and High-Current Triggered Vacuum Switch

    Publication Year: 2010 , Page(s): 2901 - 2905
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (439 KB) |  | HTML iconHTML  

    High-power and high-current test technology has many requirements for a discharging switch, such as high hold-off voltage, wide operating voltage scope, short discharging delay time and jitter, strong charge transfer ability, and long lifetime. A high-voltage and high-current triggered vacuum switch (TVS) with a surface flashover trigger device has been designed, and the trigger device is made from a material whose relative dielectric constant εr is around 2500. The experimental circuits are set up, and the experiments are performed. The experimental results showed that the TVS can be used at a maximum voltage of up to 120 kV, the minimum operation voltage is 1.3 kV, the maximum discharging delay time is less than 400 ns, and the minimum discharging delay time and jitter reach to 100 and 10 ns, respectively. The maximum current switched is about 180 kA, and the maximum transfer charge per shot is larger than 2.5 C. The switch can satisfy the main demands of crowbar circuit applications and can be used on high-voltage and high-current application situations. View full abstract»

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  • Volt-Ampere and Thermal Features of a Direct-Current Dual-Jet Plasma Generator With a Cold Gas Injection

    Publication Year: 2010 , Page(s): 2906 - 2913
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (778 KB) |  | HTML iconHTML  

    Experimental studies on the volt-ampere characteristics and thermal efficiencies of a dual-jet direct-current arc thermal plasma generator with a cold gas injection are conducted. Discharge image processing results using the contour extraction method with the variable binary thresholding technique show that, compared with the conventional dual-jet plasma generator, the length of the high-gas-temperature region increases, the arcjet expands downward with the injection of cold gas, and the arc voltage and the thermal efficiency both increase by increasing the flow rate of the injected cold gas as a whole, accompanied by the more severe electrode ablation. The derived generalized dimensional complex equations concerning the electrical and thermal characteristics of the plasma generator based on the measured data and using the multiple linear regression method can, to some extent, be employed to predict the electrical and thermal features of the plasma generator. These equations are helpful for the design and operation of the dual-jet thermal plasma generator with a cold gas injection in actual applications. View full abstract»

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  • Investigation on the Inclination of Cathode Plasma Jets in High-Current Vacuum Arcs in Magnetic Field

    Publication Year: 2010 , Page(s): 2914 - 2921
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (932 KB) |  | HTML iconHTML  

    The theoretical and experimental studies of cathode plasma jets in vacuum arc and the effect of magnetic field on them have been under way for several years. In this paper, different axial magnetic field electrodes were tested in a vacuum chamber, obvious individual cathode plasma jets were observed, and the cathode-jet inclination was also detected. Based on the numerical calculation of magnetic field in interelectrode region and the measurement of cathode-jet inclination in experimental results, it is proven that the inclination angle of composite magnetic field (the combination of the axial, the azimuthal, and the radial components) is consistent with the inclination angle of cathode plasma jets, which indicates that the cathode plasma jets in the arc column flow along the magnetic-field direction when the high-current vacuum arc is diffused or even constricted slightly. Meanwhile, it was also found that plasma jets far from the cathode surface mixed with each other and became ambiguous when the electrode gap increases to a certain distance. View full abstract»

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  • Optimization of a Magnetosphere Model for Real-Time Space Weather Prediction Using a Modified Genetic Algorithm

    Publication Year: 2010 , Page(s): 2922 - 2933
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (776 KB) |  | HTML iconHTML  

    A low-dimensional plasma physics based on the nonlinear dynamical model of the magnetosphere-ionosphere system called WINDMI is used as the basis for a real-time space weather prediction system. The input into the model is a driving voltage derived from solar wind parameters and the interplanetary magnetic field measured by the Advanced Composition Explorer satellite. The output is a field-aligned current proportional to the westward auroral electrojet AL index and the energy stored in the Earth's ring current which is proportional to the Dst index. In order to use the model for the real-time prediction of geomagnetic activity, the model parameters are required to update periodically. We developed a modified genetic algorithm (GA) with micromovement (MGAM) to train the parameters of the model in order to achieve the lowest mse against the measured AL and Dst indexes. The MGAM implements a particle-swarm-optimization-inspired movement phase that helps to improve the convergence rate while employing the efficient GA mechanism for maintaining the population diversity. The performance of the MGAM is compared to a basic real-valued GA (RGA) on five standard test functions and historical geomagnetic storm data sets. While the MGAM performs substantially better than the RGA when evaluating the standard test functions, the improvement is about 6%-12% when used on the 20-D nonlinear dynamical WINDMI model. View full abstract»

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  • Towards Diagnostics for a Fusion Reactor

    Publication Year: 2010 , Page(s): 2934 - 2943
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (874 KB) |  | HTML iconHTML  

    The requirements for measurements on modern tokamak fusion plasmas are outlined, and the techniques and systems used to make the measurements, usually referred to as “diagnostics”, are introduced. The basics of three particular diagnostics - magnetics, neutron systems, and a laser based optical system - are outlined as examples of modern diagnostic systems, and the implementation of these diagnostics on a current tokamak (JET) are described. The next major step in magnetic confinement fusion (MCF) is the construction and operation of the International Thermonuclear Experimental Reactor (ITER), which is a joint project of China, Europe, Japan, India, Korea, the Russian Federation, and the U.S. Construction has begun in Cadarache, France. It is expected that ITER will operate at the 500 MW level. Because of the harsh environment in the vacuum vessel where many diagnostic components are located, the development of diagnostics for ITER is a major challenge - arguably the most difficult challenge ever undertaken in the field of MCF diagnostics. The main elements in the diagnostic step are outlined using the three chosen techniques as examples. Finally, the step beyond ITER to a demonstration reactor, DEMO, that is expected to produce several GWs of fusion power is considered and the impact on diagnostics outlined. It is shown that the applicability and development steps needed for the individual diagnostic techniques will differ. The challenges for DEMO diagnostics are substantial and a dedicated effort is required to find and develop new techniques, and special techniques appropriate to the DEMO environment. It is argued that the limitations and difficulties in diagnostics should be a consideration in the optimization and designs of candidate DEMOs. View full abstract»

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  • Relativistic Cherenkov Microwave Oscillator Without a Guiding Magnetic Field for the Electron-Beam Energy of 0.5 MeV

    Publication Year: 2010 , Page(s): 2944 - 2947
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (429 KB) |  | HTML iconHTML  

    The feasibility of a relativistic Cherenkov microwave oscillator with no magnetic field for an electron-beam energy of ~0.5 MeV is studied. The oscillator geometry, with an efficiency of electron-beam power conversion to microwave radiation of ~20%, is simulated. The estimated radiation power is 400 MW. In the experiment, stable oscillation with ~6% efficiency is realized, taking into account the total current of a planar diode producing the electron beam. The microwave peak power for the operating TM01 wave was 140 ± 30 MW at 3.82 GHz. View full abstract»

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  • Membrane Permeability and Cell Survival After Nanosecond Pulsed-Electric-Field Exposure—Significance of Exposure-Media Composition

    Publication Year: 2010 , Page(s): 2948 - 2953
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (301 KB) |  | HTML iconHTML  

    Exposures to nanosecond pulsed electric fields (nsPEFs) are known to induce intracellular responses, such as the induction of apoptosis, offering a promising new method to treat cancer. This and other secondary biological responses are believed to be promoted by an initial formation of nanopores in cellular membranes. The primarily responsible charging mechanisms depend on pulse duration and amplitude, as well as the conductivity of the extracellular medium. In comparison, the postexposure development of membrane integrity and secondary-cell responses depend on complex interaction of biophysical and biochemical processes. To assess the effect of exposure media beyond their electrical characteristics, we studied different exposure media with similar conductivities and osmolalities. Experiments were performed using a typical nsPEF regimen, as is used in apoptosis studies (eight pulses of 60-ns duration and 60 kV/cm). We investigated the development of membrane permeability with propidium iodide and cell survival with calcein-AM on biologically relevant times out to 20 or 90 min, respectively. We found a tenfold increase in permeabilization of the plasma membrane depending on the exposure medium and a similar effect on the cell viability. The results suggest that progression of membrane permeability and cell survival strongly depend on the composition of the extracellular medium, rather than its electrical characteristic alone. View full abstract»

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  • Comparative Studies of Atmospheric Pressure Plasma Characteristics Between He and Ar Working Gases for Sterilization

    Publication Year: 2010 , Page(s): 2954 - 2962
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1062 KB) |  | HTML iconHTML  

    Helium (He) and Argon (Ar) atmospheric pressure plasma jets operated with low-frequency power source are designed and studied. The current and voltage waveforms, formation of plasma jets, estimated rotational and vibrational temperatures, optical emission spectra, and numerical simulations for He and Ar gases are investigated to analyze the plasma characteristics. Ar plasma shows higher discharge current and many instantaneous current peaks compared with He plasma. For gas flow between 1 and 7 L/min and applied voltage between 3 and 10 kV, no significant changes in Ar plasma are observed. He plasma is found to be sensitive as far as gas flow rate and applied voltage are concerned. This sensitivity is associated with a transition from laminar to turbulent mode of gas flow. The estimated gas temperatures show higher values for Ar plasma than those of He plasma. Ar plasma jet emits extremely high intensity of OH (305 nm ~312 nm) and O (777 nm) compared with that emitted from He plasma jet. High concentration of OH and O in Ar plasma is related with high density of electrons with 4-5 eV, which is in the range of the dissociation energy of H-H, O-H, and O=O bonds. As a result, wider sterilization area and higher sterilization efficacy in indirect treatment are observed for Ar plasma than He plasma. View full abstract»

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  • Influence of Plasma Treatment on Wheat and Oat Germination and Early Growth

    Publication Year: 2010 , Page(s): 2963 - 2968
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (441 KB) |  | HTML iconHTML  

    The aim of this paper is to show and discuss the influence of cold plasma treatment on a germination enhancement of wheat and oat caryopses in wider context. Wheat and oat corns have been stimulated by cold plasma discharge under power of 500 W, air gas flow of 200 ml/min for different time durations (from 0 to 2400 s). Wheat seed coat showed an eroded surface after plasma treatment. Plasma treatment inhibited the germinating acceleration of wheat in first days but enhancement of footstalk was observed on plants grown from seeds treated for medium time. On the other hand, plasma treatment did not affect germination of oat seeds, but accelerated the rootlet generation at plants grown from treated seeds. The different content of phenolic compounds between control sprouts and sprouts from treated seedlings was discovered. The different contents illustrated changes in metabolism processes in both tested species. These phenomena indicate penetration of active species from plasma through the porous seed coat inside the seed where they react with seed cells. View full abstract»

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

 

 

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Editor-in-Chief
Steven J. Gitomer, Ph.D.
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Guest Scientist, Los Alamos National Laboratory
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