Dl. Cooke et I. Katz, TSS-1R ELECTRON CURRENTS - MAGNETIC LIMITED COLLECTION FROM A HEATED PRESHEATH, Geophysical research letters, 25(5), 1998, pp. 753-756
We show that currents collected by TSS-1R are consistent with Parker-M
urphy magnetic limited collection from the ionosphere where the local
electron temperatures are elevated as observed during the first TSS-1
mission. An analytic development of the previous Katz et al. [1994] pr
esheath model is presented. This model accounts for the heating that o
ccurs as electrons fall through the potentials necessary to reflect th
e ram ions while satisfying the Bohm sheath stability criterion. This
presheath model is coupled to; a sheath sized to the Parker-Murphy col
lection radius to predict the current collected by TSS-1R. The resulta
nt currents are 2 to 3 times larger than for the standard Parker-Murph
y collection model and are consistent with observations.