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Investigation of the nonlinear behavior of a partially ionized, turbulent plasma in a magnetic field

J. Appl. Phys. 68, 488 (1990); doi:10.1063/1.346818

Issue Date: 15 July 1990

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Scott A. Stafford, Mark Kot, and J. Reece Roth
UTK Plasma Science Laboratory, Department of Electrical and Computer Engineering, University of Tennessee, Knoxville, Tennessee 37996-2100
In this paper, a number of the methods of nonlinear dynamics are applied to the study of electrostatic turbulence in a magnetized, steady-state, partially ionized plasma. Electrostatic potential fluctuations were obtained by using a capacitative probe. These signals were captured, digitized, and recorded with a LeCroy transient recorder system interfaced to an IBM-AT personal computer. A commercially available software program was used to calculate power spectra, to reconstruct and plot phase portraits, take Poincaré sections, compute correlation dimensions and Lyapunov exponents, and to perform other manipulations of the time series of electrostatic potential fluctuations obtained from the plasma. Evidence of low-dimensional chaos was sought, and trends were investigated which related the state of the turbulence to such plasma parameters as the anode voltage (rms electrostatic potential), background gas pressure (collisionality), and magnetic induction. These variables were found to have a significant effect on the nonlinear dynamics of the plasma. Journal of Applied Physics is copyrighted by The American Institute of Physics.
History: Received 15 January 1990; accepted 3 April 1990
Permalink: http://link.aip.org/link/?JAPIAU/68/488/1
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KEYWORDS and PACS

Keywords
PACS
  • 52.25.Gj
    The physics of plasmas and electric discharges Plasma properties Fluctuation phenomena
  • 52.35.Ra
    The physics of plasmas and electric discharges Waves, oscillations, and instabilities in plasma Plasma turbulence
  • 52.70.Ds
    The physics of plasmas and electric discharges Plasma diagnostic techniques and instrumentation Electric and magnetic measurements
  • YEAR: 1990

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PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
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