Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aipc..203..259s&link_type=abstract
IN: Particle astrophysics - The NASA cosmic ray program for the 1990s and beyond (A92-20526 06-93). New York, American Institute
Astronomy and Astrophysics
Astrophysics
Abundance, Cerenkov Counters, Cosmic Rays, Particle Energy, Radioactive Isotopes, Energy Spectra, Milky Way Galaxy, Solar System
Scientific paper
A ring imaging Cerenkov counter, (RICH), for the Astromag facility is described. This counter can be used in combination with a rigidity measurement from Astromag to determine the isotopic composition of cosmic ray particles over an energy range extending from 10 to 100 GeV/amu. Such measurements are important to study the lifetime of cosmic rays in the galaxy, and their history of propagation. They also determine if the sources of cosmic rays are similar in composition to the solar system, or if the contributions of more evolved or exotic matter must be included. In order to resolve isotopes at these energies, the Lorentz factor and rigidity of the particle must be measured at the few percent level. The magnetic field of Astromag permits a rigidity determination to this level of accuracy.
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