Particle trajectory tracing in the geomagnetic field

Citation
Mha. Huang et al., Particle trajectory tracing in the geomagnetic field, CHIN J PHYS, 39(1), 2001, pp. 1-11
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
CHINESE JOURNAL OF PHYSICS
ISSN journal
0577-9073 → ACNP
Volume
39
Issue
1
Year of publication
2001
Pages
1 - 11
Database
ISI
SICI code
0577-9073(200102)39:1<1:PTTITG>2.0.ZU;2-1
Abstract
The particles detected in a near Earth orbit could be primary cosmic rays, trapped radiation, or albedo particles produced in the atmosphere. To under stand the origin of these particles, we have developed a set of programs to trace charged particles in the geomagnetic field. The algorithm and the mo del of the geomagnetic field adopted are described in this article. The num erical errors are studied in two ways, as a function of either the tracing time or the gyration step size. An optimal step size of 0.04 rad is selecte d for further analyses. Using this program, we studied the data obtained by the Alpha Magnetic Spectrometer and were able to differentiate cosmic rays from atmospheric secondary particles.