High resolution Cerenkov and range detectors for balloon-borne cosmic-ray experiment

Details High resolution Cerenkov and range detectors for balloon-borne cosmic-ray experiment High resolution Cerenkov and range detectors for balloon-borne cosmic-ray experiment

Jun 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975stin...7622139a&link_type=abstract

Unknown

Computer Science

Balloon-Borne Instruments, Cerenkov Counters, Cosmic Rays, Extraterrestrial Matter, Iron Isotopes, Galactic Radiation, Heavy Ions, Muons, Nuclear Interactions, Rangefinding, Velocity Measurement

Scientific paper

A combination of an active Cerenkov detector and passive range detectors is proposed for the high resolution measurement of isotopic composition in the neighborhood of iron in the galactic cosmic rays. A large area (4,300 sq cm) Cerenkov counter and passive range detectors were tested. Tests with heavy ions (2.1 GeV/amu C-12, 289 MeV/amu Ar-40, and 594 MeV/amu Ne-20) revealed the spatial uniformity of response of the Cerenkov counter to be better than 1% peak-to-peak. Light collection efficiency is independent of projectile energy and incidence angle to within at least 0.5%. Passive Lexan track recorders to measure range in the presence of the nuclear interaction background which results from stopping particles through 0.9 interaction lengths of matter were also tested. It was found that nuclear interactions produce an effective range straggling distribution only approximately 75% wider than that expected from range straggling alone. The combination of these tested techniques makes possible high mass resolution in the neighborhood of iron.

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