Heating of ion conics in the cusp/cleft
Abstract
Ion conic distributions are often observed in the cusp/cleft region of the dayside magnetosphere. These ions can be heated by resonant interaction with broadband low-frequency (near the ion gyrofrequency) waves. Data from one cusp/cleft crossing of the polar orbiting DE-1 satellite is studied in detail. Observed cool O(+) distributions and observed wave intensities are used as input to a Monte Carlo simulation. The theoretically obtained hot O(+) distributions are in good agreement with the corresponding observed distributions. This resonant heating by broadband low-frequency waves is important for the outflow of ionospheric ions into the magnetosphere.
- Publication:
-
Physics of Space Plasmas (1989)
- Pub Date:
- 1990
- Bibcode:
- 1990pspp.book..203A
- Keywords:
-
- Computerized Simulation;
- Earth Ionosphere;
- Earth Magnetosphere;
- Ion Distribution;
- Ionospheric Heating;
- Satellite Observation;
- Conics;
- Low Frequencies;
- Monte Carlo Method;
- Plasma-Electromagnetic Interaction;
- Polar Cusps;
- Geophysics