On the thermal noise 'temperature' in an anisotropic plasma

Details On the thermal noise 'temperature' in an anisotropic plasma On the thermal noise 'temperature' in an anisotropic plasma

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21..397m&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 6, p. 397-400

Physics

Plasma Physics

12

Anisotropy, Electron Energy, Magnetic Fields, Plasma Physics, Space Plasmas, Thermal Noise, Gyrofrequency, Variations, Velocity Distribution

Scientific paper

Electrostatic waves are often detected with wire dipoles longer than the wave-lengths. The electrostatic directivity pattern of such antennas has lobes roughly perpendicular to those of short dipoles. As a consequence, in a plasma where the electron temperatures are different along (T parallel to) and across (T perpendicular to) the magnetic field, the thermal noise 'temperature' is (T perpendicular to ) if the antenna is parallel to B and (T parallel to + T perpendicular to)/2 if it is perpendicular. Practical applications for space plasma and wave polarization measurements are given.

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