Transition Radiation Array for Cosmic Energetic Radiation (TRACER) is a balloon flown
cosmic ray
Cosmic rays or astroparticles are high-energy particles or clusters of particles (primarily represented by protons or atomic nuclei) that move through space at nearly the speed of light. They originate from the Sun, from outside of the ...
detector built and designed at the
University of Chicago
The University of Chicago (UChicago, Chicago, or UChi) is a Private university, private research university in Chicago, Illinois, United States. Its main campus is in the Hyde Park, Chicago, Hyde Park neighborhood on Chicago's South Side, Chic ...
. The detector is designed to measure the energy spectra of cosmic ray
nuclei with
atomic numbers between five and twenty-six (
boron
Boron is a chemical element; it has symbol B and atomic number 5. In its crystalline form it is a brittle, dark, lustrous metalloid; in its amorphous form it is a brown powder. As the lightest element of the boron group it has three ...
to
iron
Iron is a chemical element; it has symbol Fe () and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's o ...
).
[ Muller, D., 2007, ‘’The TRACER Project: Instrument Concept, Balloon Flights, and Analysis Procedures’‘, 30th International Cosmic Ray Conference.]
References
Cosmic-ray experiments
Balloon-borne experiments
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