Three dimensional double layers in magnetized plasmas

Details Three dimensional double layers in magnetized plasmas Three dimensional double layers in magnetized plasmas

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9.1049j&link_type=abstract

Geophysical Research Letters, vol. 9, Sept. 1982, p. 1049-1052.

Physics

Plasma Physics

11

Electron Distribution, Electrostatic Probes, Magnetic Field Configurations, Metallic Plasmas, Plasma Layers, Electron Beams, Electron Energy, Larmor Radius, Plasma Control, Plasma Density, Plasma Physics, Space Plasmas

Scientific paper

Experimental results are presented which demonstrate the formation of fully three-dimensional double layers in a magnetized plasma. The measurements are performed in a magnetized stationary plasma column with a radius of 1.5 cm. Double layers are produced by introducing an electron beam with a radius of 0.4 cm along the magnetic field from one end of the column. The voltage drop across the double layer is found to be determined by the energy of the incoming electron beam. In general, it is found that the width of the double layer along the external magnetic field is determined by plasma density and beam energy, while the ion Larmor radius gives a characteristic width in the perpendicular direction. The electrons are strongly magnetized for all experimental conditions considered here.

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