Harlan Spence
Spence leads a research group that studies the physics of cosmic plasmas, from the Sun's corona to interplanetary space to Earth's upper atmosphere, using experimental and modeling techniques. He is principal investigator on two major NASA projects: CRaTER, the Cosmic Ray Telescope for the Effects of Radiation, and the Energetic Particle, Composition, and Thermal Plasma Suite of the Radiation Belt Storm Probes (RBSP-ECT). He became director of EOS in 2010 after 15 years at Boston University.