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2 edition of Low pressure striations in argon and helium glow discharges found in the catalog.

Low pressure striations in argon and helium glow discharges

Monte V. Davis

Low pressure striations in argon and helium glow discharges

by Monte V. Davis

  • 282 Want to read
  • 17 Currently reading

Published .
Written in English

    Subjects:
  • Electric discharges through gases.

  • Edition Notes

    Statementby Monte Vincent Davis.
    The Physical Object
    Pagination38 leaves, bound :
    Number of Pages38
    ID Numbers
    Open LibraryOL14305069M

    Cold-cathode discharges and breakdown in argon Ar+ Ar 10 Ion or atom energy (eV) 1 10 Electron yield per ion or atom Figure 1. Electron yields for Ar+ and Ar beams incident on various clean metal surfaces versus particle energy.   Array of atmospheric pressure surface discharges confined by a two-dimensional hexagon electrode mesh is studied for its discharge modes and temporal evolution so as to a theoretical underpinning to their growing applications in medicine, aerodynamic control, and environmental remediation. Helium plasma surface-confined by one hexagon-shaped rim electrode is shown to Cited by:

    The U.S. Department of Energy's Office of Scientific and Technical Information. probe has been used, and the current-voltage (I-V) characteristic for argon and helium glow discharges, at different discharge voltage and gas pressure, along the tube axis from the cathode surface to the anode were measured. Values of the electron temperature are obtained by the logarithmic plot method according to Eq. (10).File Size: KB.

    This banner text can have markup.. web; books; video; audio; software; images; Toggle navigation. Apparent secondary-electron emission coefficient and the voltage-current characteristics of argon glow discharges Z. Donko´ Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, P.O. H Budapest, HungaryFile Size: KB.


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Low pressure striations in argon and helium glow discharges by Monte V. Davis Download PDF EPUB FB2

This letter reports the detailed observations and investigations of striations in the positive column region of helium glow discharges with a pin-to-plate copper electrode geometry in the pressure.

DC glow discharges were experimentally investigated in atmospheric pressure helium, argon, hydrogen, nitrogen and air. The discharges were characterized by visualization of the discharges and. Plasma electron density was obtained by the two methods described earlier in the previous section.

Fig. 3 shows the electron density, n e, in the helium plasma as a function of power at two different gas pressures. n e increases with both power and pressure as in the case of argon plasma.

Other studies of He plasmas also show this behavior.Over the power and pressure range employed in Cited by: 4. The DC glow discharge was first observed with helium, neon, and nitrogen used as working gas in a tube at the low pressure, and characterized by different regions depending on the discharge parameters (e.g., the geometry of the electrodes, the gas type, and the pressure) 6.

This kind of discharge was also successfully generated at high pressure Cited by: Genetic effects of radio-frequency, atmospheric-pressure glow discharges with helium Guo Li,1 He-Ping Li,1,a Li-Yan Wang,2 Sen Wang,1 Hong-Xin Zhao,2 Wen-Ting Sun,1,b Xin-Hui Xing,2,a and Cheng-Yu Bao1 1Department of Engineering Physics, Tsinghua University, BeijingPeople’s Republic of China 2Department of Chemical Engineering, Tsinghua University, BeijingPeople’s File Size: KB.

working gases. Most of the authors used helium or argon as the primary plasma-working gas (e.g., [3] and [4]), which leads to high capital costs of the RF APGDs in their actual applications.

Therefore, it is necessary to obtain the uniform and steady glow discharges with cheaper primary plasma-working gases, for example, O 2,N 2,orevenair. An atmospheric pressure discharge is an electrical discharge in air at atmospheric pressure. An electrical discharge is a plasma, which is an ionized s are sustained if there is a continuous source of energy to maintain the required degree of ionization and overcome the recombination events that lead to extinction of the discharge.

Compared with low pressure discharges, atmospheric pressure radio frequency discharges do not require ex-pensive and complicated vacuum systems, which means the capital costs of equipment could be reduced re-markably. This has promoted the recent development of the RF atmospheric pressure glow discharge plasma source.

Fluid simulations of glow discharge& Effect of metastable atoms in argon Dimitris P. Lymberopoulos and Demetre J. Economou’) Department of Chemical Engineering, Plasma Processing Laboratory University Houston, Houston, Texas File Size: 1MB.

Introduction. Glow discharge has been widely applied for plasma processings, and also wall conditionings based upon glow discharge have been employed in fusion devices such as the large helical device (LHD), and other tokamaks, in order to reduce the retention of discharge gas such as hydrogen, deuterium, helium and impurities at the wall by: 3.

2 Numerical modelling of dc argon glow discharge at low pressure state Ar (3P2) is confirmed, so the modelling is performed for the case without and with metastable state Ar (3P2) and the results are applied model is solved by the finite difference method.

ATMOSPHERIC PRESSURE GLOW DISCHARGE PLASMA 85 electrode is coated with a dielectric layer. The gap is of the order of several mm and the applied voltage is about 20 kY.

DBD7 represents self-sustained non­ equilibrium electrical discharges that are operated at approximately atmospheric pressure, typically between bar and 1 Size: 3MB.

Low-frequency one-electrode discharge in long tubes at low gas pressure Shishpanov A.I., Bazhin P.S., Ivanov D.O., Meschanov A.V. and Ionikh Yu. Saint Petersburg State University, Department of optics [email protected] The specific form of one electrode capacitive discharge was studied in Author: Aleksandr Shishpanov, Pavel Bazhin, Danila Ivanov, Aleksandr Meschanov, Yuri Ionikh.

Two-dimensional self-consistent fluid simulations of a MHz argon glow discharge including metastable species were performed as examples of a coupled glow-discharge/ neutral-transport-and-reaction system.

The electron density was found to peak in the radial direction. Experiments on plasma oscillations in gaseous discharges are generally carried out in evacuated tubes* ordinarily diodes* maintained at varying pressures.

The glow discharges of interest here utilize mercury, argon or similar gas at pressures in the low micron range* (up to. Non-thermal properties of Argon glow discharge operating with various operating pressures were measured and presented in this work. The Argon plasma is produced by a parallel conducting electrodes coupling with a high voltage AC power supply.

The power supply can generate high AC voltage at various frequencies. The frequencies for the operation are in the range of a few : Watcharapon Kongpiboolkid, Rattachat Mongkolnavin.

@article{osti_, title = {Study of a contracted glow in low-frequency plasma-jet discharges operating with argon}, author = {Minotti, F. and Giuliani, L. and Xaubet, M. and Grondona, D.}, abstractNote = {In this work, we present an experimental and theoretical study of a low frequency, atmospheric plasma-jet discharge in argon.

The discharge has the characteristics of a contracted glow. Modeling of DC Discharges in Argon at Low Pressures Vladimir Gorokhovsky1 Vapor Technologies, Inc., Dry Creek Parkway, Longmont, Colorado Introduction: Low pressure discharge plasma has various applications in material processing, lasers and power electronics to.

In this paper, atmospheric pressure glow discharges (APGD) in argon generated in parallel plate dielectric barrier discharge system is investigated by means of electrical and optical measurements.

Using a high voltage (0–20 kV) power supply operating at 10–30 kHz, homogeneous and steady APGD has been observed between the electrodes with gap spacing from mm to 2 mm and Cited by:   Spatially two-dimensional and axial-symmetric plasma model is developed to investigate the characteristics of a bar–plate corona discharge of argon gas under atmospheric pressure.

An improved nonlocal collision-less electron heat flux is used in the model. Numerical simulation for the process of argon corona discharge under atmospheric pressure are carried out with a separation of Cited by: 4. Magnetic Field Effect on the Characteristics of Large-Volume Glow Discharge in Argon at Low Pressure Abdilrida S.

Hasaani* Department of Physics, College of Science, University of Baghdad, Baghdad, Iraq Abstract The magnetic field effect on the current-voltage characteristic curves of glow discharge in argon at low pressures has been Author: Abdilrida S.

Hasaani.LASER-COLLISION INDUCED FLUORESCENCE IN ARGON DISCHARGES DOE Plasma Science Center May HIGHLIGHT Control of Plasma Kinetics Laser-collision induced fluorescence (LFIC) was demonstrated and calibrated in low-pressure .An atmospheric dc glow discharge using a liquid cathode and an axial miniature helium flow was generated stably between a nozzle anode and an electrolyte cathode (NaCl solution) in ambient air.

Under low-current operation, the typical structure of dc glow discharges, i.e. a negative glow, a Faraday dark space and positive column, was observed.