منابع مشابه
Double layers in the downward current region of the aurora
Direct observations of magnetic-field-aligned (parallel) electric fields in the downward current region of the aurora provide decisive evidence of naturally occurring double layers. We report measurements of parallel electric fields, electron fluxes and ion fluxes related to double layers that are responsible for particle acceleration. The observations suggest that parallel electric fields orga...
متن کاملFilamentary double layers
The properties of double layers produced in current filaments have been studied. The experiments were performed in a magnetized triple plasma device in which the diameter of the central plasma column could be varied. The scaling of the double layer potential drop I’,, with the parameter jd’, where j is the current density in the double layer and d is the double layer thickness, was determined f...
متن کاملMagnetic Field Line Reconnection Experiments, 5. Current Disruptions and Double Layers
In a large laboratory plasma a current sheet is generated in the process of magnetic field line reconnection. The stability of the sheet with respect to local current increases is investigated. When the current density in the center of the sheet exceeds a critical value, spontaneous local current disruptions are observed. The current from the center of the sheet moves out to the sides. Magnetic...
متن کاملElectrostatic interaction of oppositely charged double layers
We determined with anisotropic hypernetted chain theory the effective pressure and counterion excess of two oppositely charged surfaces immersed in an electrolyte solution. These thermodynamic properties are enhanced in surfaces with evenly smeared surface charges with respect to those containing confined mobile charges. For low surface charges and moderate reservoir salt concentration ions are...
متن کاملSheaths , Double Layers and Dust Levitation
This paper contains an overview of certain sheath phenomena, namely the criterion for sheath formation, some examples of double layers and a description of some recent experiments on the suspension ofdust particles in a sheath. A detailed review is not attempted and results obtained at Oxford are used to illustrate the last two topics.
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1981
ISSN: 0031-9007
DOI: 10.1103/physrevlett.46.115