Digitale Medien
New York, NY
:
American Institute of Physics (AIP)
Physics of Fluids
5 (1993), S. 1523-1528
ISSN:
1089-7666
Quelle:
AIP Digital Archive
Thema:
Physik
Notizen:
Positive/negative ion plasmas, composed of Ba+, SF6−, and residual electrons, were observed to display characteristics of strong turbulence. Experiments on the UCI Q machine linked the presence of negative ions (and the depletion of electrons) with large density fluctuations (δn/n(approximately-equal-to)1), large-amplitude, low-frequency electrostatic noise (f≤20 kHz), and rapid transport of ions across magnetic field lines (D⊥(approximately-equal-to)104 cm2/sec). Ion velocity distributions were heated parallel to and cooled perpendicular to the confining magnetic field. The partial pressure of gaseous SF6 was shown to serve as a regulator of plasma turbulence. Turbulence levels could be smoothly varied from quiescent states (δn/n(approximately-equal-to)0.01) to strongly turbulent states (δn/n(approximately-equal-to)1).
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.860892
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