O+ Escape in the polar ion exosphere of Mars

Haider, S. A. (1995) O+ Escape in the polar ion exosphere of Mars Advances in Space Research, 16 (6). pp. 49-55. ISSN 0273-1177

Full text not available from this repository.

Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0273-1177(95)00249-E


A model for the polar ion exosphere of Mars is developed to calculate the escape fluxes of oxygen ions and electrons through the plasmasheet of Mars at different exospheric temperatures (600K - 2300K) along the magnetic field lines originating from the baropause at latitude 75 degrees and longitude zero degrees. The intensity of the magnetic field lines in the noon-midnight meridian plane at all latitudes are calculated by assuming that Mars has a weak magnetic field of dipolar nature. To calculate the electric potential in the region of magnetic field, the quasi-neutrality condition is satisfied in such a way that escape fluxes of oxygen ions and electrons have to be equal at every point. It has been found that above T = 2300K, the escape flux does not increase and has the maximum flux ~4.3 × 106cm-2s-1 and escape rate ~3.5 × 1024 ions s-1. These values show close agreement with the observations taken by the TAUS and ASPERA experiments in the plasmasheet of Mars. The present calculation concludes that O+ ions in the plasmasheet of Mars are mainly due to the escape of oxygen ions from the ionosphere in presence of a charge separation electric field.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:60554
Deposited On:09 Sep 2011 06:59
Last Modified:16 Sep 2011 04:48

Repository Staff Only: item control page