Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.136..171x&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 136, no. 1, Aug. 1987, p. 171-181.
Astronomy and Astrophysics
Astrophysics
3
Astrophysics, Hall Effect, Low Frequencies, Magnetohydrodynamic Stability, Plasma Conductivity, Charged Particles, Electron Energy, Electrostatic Probes, Plasma Density, Solar Activity
Scientific paper
The effect of low-frequency drift wave instability on Hall conductivity in plasma was studied using a set-up consisting of a metallic tube located in a magnetic field, with two conductors inserted at both ends of the tube to form a coaxial conductor. From one end of the conductor, microwaves of 2.45-GHz frequency are applied, creating plasma inside the conductor; simultaneously, a drift instability arises with a frequency between 5 to 30 kHz. On the other end of the conductor, electric oscillations are applied to affect the drift wave amplitude (mainly around resonance). Variations of Hall conductivity observed in the experiment are attributed to electron trapping by the waves potential. Good agreement between the experimental and calculated values of azimuthal drift currents near and away from resonance was obtained, indicating that the proposed explanation by electron trapping might be correct. The importance of the interaction of plasma with the magnetic field in astrophysical phenomena is discussed.
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