A new measurement of the energy spectra of cosmic-ray nuclei
نویسندگان
چکیده
A new large-area detector system was constructed at the University of Chicago for direct measurements of heavy cosmic ray nuclei (oxygen to iron) up to about 10 TeV/nucleon. TRACER (”Transition Radiation Array for Cosmic Energetic Radiation”) uses plastic scintillators to measure charge and a proportional tube array to measure energy via specific ionization and transition radiation. While TRACER is designed for circumglobal long-duration balloon flights, an initial 28-hour flight was conducted in Autumn 1999 from Ft. Sumner, New Mexico. We will discuss the performance of the detector and present first data from the balloon flight.
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