Electron Crescent Distributions as a Manifestation of Diamagnetic Drift in an Electron-Scale Current Sheet: Magnetospheric Multiscale Observations Using New 7.5 ms Fast Plasma Investigation Moments.

Academic Article

Abstract

  • We report Magnetospheric Multiscale observations of electron pressure gradient electric fields near a magnetic reconnection diffusion region using a new technique for extracting 7.5 ms electron moments from the Fast Plasma Investigation. We find that the deviation of the perpendicular electron bulk velocity from E × B drift in the interval where the out-of-plane current density is increasing can be explained by the diamagnetic drift. In the interval where the out-of-plane current is transitioning to in-plane current, the electron momentum equation is not satisfied at 7.5 ms resolution.
  • Authors

  • Rager, AC
  • Dorelli, JC
  • Gershman, DJ
  • Uritsky, V
  • Avanov, LA
  • Torbert, Roy
  • Burch, JL
  • Ergun, RE
  • Egedal, J
  • Schiff, C
  • Shuster, JR
  • Giles, BL
  • Paterson, WR
  • Pollock, CJ
  • Strangeway, RJ
  • Russell, CT
  • Lavraud, B
  • Coffey, VN
  • Saito, Y
  • Status

    Publication Date

  • January 28, 2018
  • Published In

    Keywords

  • diamagnetic drift
  • reconnection
  • Digital Object Identifier (doi)

    Start Page

  • 578
  • End Page

  • 584
  • Volume

  • 45
  • Issue

  • 2