Mary K. Hudson

TL;DR: In this article, the gamma lines produced when solar energetic protons hit the upper atmosphere are used to study SEP events, and the open-closed boundary of the gamma line is mapped.

TL;DR: In this paper, contrasting drivers of radiation belt electron response at solar minimum have been investigated with MHD-test particle test with the Whole Heliosphere and Planetary Interactions (WHPI) initiative.

TL;DR: In this paper, the evolution of weak double layers in a hydrogen plasma was extended to include H(+) and O(+) with relative drift, where the relative drift between hydrogen and oxygen ions due to a quasi-static parallel electric field gives rise to a strong linear fluid instability which dominates the ion-acoustic mode at the bottom of the auroral acceleration region.

TL;DR: The polar orbiting S3-3 satellite provides an opportunity to study plasma phenomena occuring on auroral magnetic field lines below 8000 km because the on-board instruments measure AC and DC electric fields and thermal particle densities, energetic ions and electrons, and field-aligned currents as discussed by the authors.