Relationships Between the Flux Tube Volume, Content, Plasma Pressure, and Density in the Plasma Sheet

Long-term-averaged data-based models of the magnetic field and of many fluid parameters have been created within the plasma sheet using eight years of Geotail data. The models are three-dimensional, making it possible to carry out the integrals that are needed to determine the volume and plasma content of a unit flux tube. Contours of constant flux tube volume and content are compared with contours of the electron and ion pressures, temperatures, and density at the neutral sheet. Those combinations of the fluid parameters which are used to examine the long-term-averaged adiabatic properties of any plasma that remains in a typical moving flux tube also will be shown.