Flow, flow shear, and related profiles in helicon plasmas

Scime, E; Hardin, R; Biloiu, C; Keesee, A M; Sun, X

doi:10.1063/1.2716687

Title: Flow, flow shear, and related profiles in helicon plasmas

Full Record
Other Related Research

Abstract

Measurements of the three-dimensional ion flow field and the ion temperature in a cross section of a cylindrical, argon, helicon plasma are presented. When these measurements are combined with radially resolved measurements of the plasma density, electron temperature, neutral density, and neutral temperature, the radial profiles of the ion viscosity and ion-neutral momentum transfer rate can be calculated. The ion viscosity and ion-neutral momentum transfer rate profiles are important input parameters for theoretical models of azimuthal flows arising from the nonlinear interaction of drift waves in helicon sources. The experimentally determined magnitudes and radial profiles reported in this work are significantly different than those used in recent theoretical studies. Measurements of the radial flow of argon neutrals and helium neutrals are also presented for a helicon plasma.

Authors:

Scime, E; Hardin, R; Biloiu, C; Keesee, A M; Sun, X ^[1]

Department of Physics, West Virginia University, Morgantown, West Virginia 26506-6315 (United States)

Publication Date:: Sun Apr 15 00:00:00 EDT 2007

OSTI Identifier:: 20974950

Resource Type:: Journal Article

Journal Name:: Physics of Plasmas

Additional Journal Information:: Journal Volume: 14; Journal Issue: 4; Other Information: DOI: 10.1063/1.2716687; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ARGON; COLLISIONS; CYLINDRICAL CONFIGURATION; ELECTRON TEMPERATURE; HELIUM; ION TEMPERATURE; IONS; MOMENTUM TRANSFER; NONLINEAR PROBLEMS; PLASMA; PLASMA DENSITY; PLASMA DIAGNOSTICS; PLASMA DRIFT; SHEAR; WAVE PROPAGATION

Citation Formats


                    Scime, E, Hardin, R, Biloiu, C, Keesee, A M, and Sun, X. Flow, flow shear, and related profiles in helicon plasmas.  United States: N. p., 2007. 
        Web.  doi:10.1063/1.2716687.

Copy to clipboard


                    Scime, E, Hardin, R, Biloiu, C, Keesee, A M, & Sun, X. Flow, flow shear, and related profiles in helicon plasmas.  United States.  https://doi.org/10.1063/1.2716687

Copy to clipboard


                    Scime, E, Hardin, R, Biloiu, C, Keesee, A M, and Sun, X. 2007.  
        "Flow, flow shear, and related profiles in helicon plasmas".  United States.  https://doi.org/10.1063/1.2716687.

Copy to clipboard


                    
@article{osti_20974950,

  title        = {Flow, flow shear, and related profiles in helicon plasmas},

  author       = {Scime, E and Hardin, R and Biloiu, C and Keesee, A M and Sun, X},

  abstractNote = {Measurements of the three-dimensional ion flow field and the ion temperature in a cross section of a cylindrical, argon, helicon plasma are presented. When these measurements are combined with radially resolved measurements of the plasma density, electron temperature, neutral density, and neutral temperature, the radial profiles of the ion viscosity and ion-neutral momentum transfer rate can be calculated. The ion viscosity and ion-neutral momentum transfer rate profiles are important input parameters for theoretical models of azimuthal flows arising from the nonlinear interaction of drift waves in helicon sources. The experimentally determined magnitudes and radial profiles reported in this work are significantly different than those used in recent theoretical studies. Measurements of the radial flow of argon neutrals and helium neutrals are also presented for a helicon plasma.},

  doi          = {10.1063/1.2716687},

  url          = {https://www.osti.gov/biblio/20974950},
  journal      = {Physics of Plasmas},

  issn         = {1070-664X},

  number       = 4,

  volume       = 14,

  place        = {United States},

  year         = {Sun Apr 15 00:00:00 EDT 2007},

  month        = {Sun Apr 15 00:00:00 EDT 2007}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1063/1.2716687

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Laser induced fluorescence measurements of ion velocity and temperature of drift turbulence driven sheared plasma flow in a linear helicon plasma device

Journal Article Chakraborty Thakur, S; Fedorczak, N; Manz, P; ... - Physics of Plasmas

Using laser induced fluorescence (LIF), radial profiles of azimuthal ion fluid velocity and ion temperature are measured in the controlled shear de-correlation experiment (CSDX) linear helicon plasma device. Ion velocities and temperatures are derived from the measured Doppler broadened velocity distribution functions of argon ions. The LIF system employs a portable, high power (>300 mW), narrowband ({approx}1 MHz) tunable diode laser-based system operating at 668.614 nm. Previous studies in CSDX have shown the existence of a radially sheared azimuthal flow as measured with time delay estimation methods and Mach probes. Here, we report the first LIF measurements of sheared plasmamore »« less
https://doi.org/10.1063/1.4742178
Modeling of profile effects for inductive helicon plasma sources

Journal Article Mouzouris, Y; Scharer, J - IEEE Transactions on Plasma Science

A computer code for modeling existing and new helicon sources for materials processing has been developed. The Nagoya type-III, helical, and Stix coil antennas have been modeled to study and examine plasma density and temperature profile effects on power absorption of a small fraction (n{sub fe}/n{sub e} {approx} 5%) of fast electrons (T{sub e-fast} {approx} 40 eV) which provide ionization of the neutral gas in the experiment, and bulk (T{sub e-slow} {approx} 3 eV) electron distributions in an argon gas. The ANTENA computer code, originally written by B. McVey to study ion cyclotron waves, was modified and used to studymore »« less
https://doi.org/10.1109/27.491753
ACCELERATION OF PLASMAS BY INDUCTIVELY GENERATED ELECTROMAGNETIC FIELDS

Thesis/Dissertation Miller, D

Some aspects of the induction accelerator that can be derived theoretically are brought out. Isolated particle behavior within a cylindrical coil is studied. Charges gain energy from the azimuthally directed electric field; their paths are turned in the radial and axial directions by the magnetic field, and they eventually are ejected out the end of the coil. The exact paths of electrons and helium and argon ions under various field conditions are calculated by analog computer techniques, and from these calculations are obtained the velocity and angle that the ejected particles ultimately obtain. The quantitative dependence of ejection characteristics onmore »« less
ACCELERATION OF PLASMAS BY INDUCTIVELY GENERATED ELECTROMAGNETIC FIELDS. Final Report

Technical Report Miller, D

A discussion is given of the theory and experimental behavior of an induction electromagnetic accelerator, which employs a time-varying current in a coil to generate the force-prcducing electric and magnetic fields. Some aspects of the induction accelerator which can be derived theoretically are first brought out. These begin with a study of isolated particle behavior within a cylindrical coil. Charges gain energy from tue azimuthally directed electric field; their paths are turned in the radial and axial directions by the magnetic field, and they eventually are ejected out the end of the coil. The exact paths of electrons and heliummore »« less
Neutral gas distribution in a helicon plasma source

Conference Breun, R; Gilland, J; Hershkowitz, N

High density helicon plasma sources have demonstrated the phenomenon of neutral pumping. The high electron density of a wave generated plasma column in an axial magnetic field ionizes an appreciable fraction of the neutrals in the column. The neutrals then become concentrated at the ends of the source, where the loss flux is concentrated. The axial profile of argon neutral pressure at a radius of 3.5 cm has been measured using a capacitive manometer in a helicon source operated at 1,000 G, 200--700 W. The plasma radius was approximately 2 cm. The data indicate a decrease in neutral pressure frommore »« less

Similar Records