Magnetosphere Seminars

Gyro-Sounding an EDR with Energetic Electrons Observed by MMS-FEEPS

Speaker:Trevor Leonard (LASP)
Date:Tuesday, Nov 14, 2017
Time:3:30 PM
Location:LASP Space Science Building, room W275

Seminar Abstract:

The Magnetospheric Multiscale (MMS) Fly’s Eye Energetic Particle Spectrometer (FEEPS) is part of the Energetic Particle Detector (EPD) Investigation and one of several particles and fields investigations on MMS. FEEPS observes electrons and ions in the range of about 25 keV to 550 keV from 96 particle telescopes across the 4 MMS spacecraft using single silicon detectors. On 2015 December 6, the MMS constellation crossed into the magnetopause and observed an electron-scale current sheet and electron outflow jet from asymmetric reconnection with a weak guide field near the subsolar magnetopause, described in Khotyaintsev et al. (2016). Within seconds of this reconnection region, FEEPS observed energetic electron pitch angle distributions with depletions which appear to be dependent on the electron gyroradius. This investigation begins to test whether we may be observing a depletion in energetic electrons from gyro- sounding the electron diffusion region (EDR).