Transverse auroral ion energization observed on DE-1 with simultaneous plasma wave and ion composition measurementsSimultaneous high-time-resolution plasma-wave and ion-composition measurements obtained with DE-1 during a magnetospheric-cusp crossing on March 15, 1984 and during an evening auroral-zone crossing on January 4, 1984 are reported. The data are presented graphically and characterized in detail, with a focus on the transverse energization of H(+) and O(+) ions. An O(+) distribution observed during the cusp crossing is shown to be well represented by a bi-Maxwellian distribution with temperatures 180 eV parallel and 250 eV perpendicular to the local magnetic field and a bulk flow velocity of 27 km/s up the magnetic-field line. In the auroral-zone data a simultaneous transverse-energy increase is detected in both H(+) and O(+) components in the presence of plasma-wave emissions at multiples of the hydrogen gyrofrequency.
Document ID
19870050055
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Peterson, W. K. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Shelley, E. G. (Lockheed Research Laboratories Palo Alto, CA, United States)
Boardsen, S. A. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Gurnett, D. A. (Iowa, University Iowa City, United States)