Protons in near earth orbit
High Energy Physics - Experiment
2012-08-27 v1 Astrophysics
Abstract
The proton spectrum in the kinetic energy range 0.1 to 200 GeV was measured by the Alpha Magnetic Spectrometer (AMS) during space shuttle flight STS-91 at an altitude of 380 km. Above the geomagnetic cutoff the observed spectrum is parameterized by a power law. Below the geomagnetic cutoff a substantial second spectrum was observed concentrated at equatorial latitudes with a flux ~ 70 m^-2 sec^-1 sr^-1. Most of these second spectrum protons follow a complicated trajectory and originate from a restricted geographic region.
Cite
@article{arxiv.hep-ex/0002049,
title = {Protons in near earth orbit},
author = {AMS Collaboration},
journal= {arXiv preprint arXiv:hep-ex/0002049},
year = {2012}
}
Comments
19 pages, Latex, 7 .eps figures