``Non-collisional'' ionization and temperature layers in the auroral E/F1 layer: EISCAT observations

Details ``Non-collisional'' ionization and temperature layers in the auroral E/F1 layer: EISCAT observations ``Non-collisional'' ionization and temperature layers in the auroral E/F1 layer: EISCAT observations

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.1407s&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 11, p. 1407-1410

Physics

3

Ionosphere: Plasma Waves And Instabilities, Ionosphere: Auroral Ionosphere, Ionosphere: Ionospheric Disturbances, Ionosphere: Ionospheric Irregularities

Scientific paper

EISCAT observations of thin layers of enhanced ionization and elevated electron temperature during auroral precipitations, similar to the phenomenon of the `Enhanced Aurora', are presented and described. Being well narrower than those predicted by the conventional collisional approach, the layers are likely caused by plasma turbulence generated by precipitating electrons and field-aligned currents in the altitude range 110-170 km. The results are in a qualitative agreement with the model of the plasma turbulence layer which takes the influence of collisions upon the beam-plasma interaction into account.

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