An analytical relationship between the magnetospheric potential drop and the ionospheric conductance

In this thesis we derive an analytical relationship between the Earth's magnetospheric potential drop and the ionospheric conductance by adopting a simple two-dimensional model of a magnetic field draping around the tail magnetopause. Two methods are used: (1) matching currents through the tail magnetopause and the Earth's ionosphere in analogy with the Alfven wing at the Jovian satellite Io, (2) minimizing the total power that the solar wind loses to the Earth's magnetosphere. We find, in both cases, that the magnetospheric potential drop, $\Delta\phi\sb{\rm is}$, is inversely proportional to the ionospheric conductance, $\Sigma\sb{\rm is}$, and we compare this result to the revised result of the numerical model of Fedder and Lyon (1987) and to the conclusions of Hill et al. (1976) and Hill (1984). Considering the derived proportionality factor as a 'magnetosheath conductance', $\Sigma\sb{\rm msh}$, we determine that the high-latitude tail magnetospheric 'driver' acts as a current generator as opposed to a voltage generator.

Name thesis:degree_name

Doctor of Philosophy

Level thesis:degree_level

Doctoral

Discipline thesis:degree_discipline

Natural Sciences

Grantor

Rice University

Year dc:date.issued

1994

Author dc:creator

• Krisko, Paula Helene

• Plasma physics

Statement dc:rights

• Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.

Language dc:language.iso

eng

Handle dc:identifier.uri

https://hdl.handle.net/1911/16748

OAI identifier oai:identifier

oai:repository.rice.edu:1911/16748