RICH counter for identifying antimatter and light isotopes in the cosmic radiation

Details RICH counter for identifying antimatter and light isotopes in the cosmic radiation RICH counter for identifying antimatter and light isotopes in the cosmic radiation

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994itns...41.1321c&link_type=abstract

IEEE Transactions on Nuclear Science (ISSN 0018-9499), vol. 41, no. 4, pt. 1, p. 1321-1327

Physics

1

Calibrating, Cerenkov Counters, Cosmic Rays, Radiation Detectors, Radiation Measurement, Charged Particles, Electrons, Isotopes, Protons, Spectrometers

Scientific paper

A RICH counter using a solid radiator of NaF is described. It will be an important part of a balloon borne magnet spectrometer to measure the flux of antiprotons and light nuclei in the cosmic radiation. For beta = 1 particles of unit charge (normal incidence), 20 photoelectrons per event are detected resulting in a resolution of the reconstructed Cherenkov angle of 5 mrad (r.m.s.). For 14N nuclei more than 1000 photoelectrons are detected per event (beta = 0.86, normal incidence). Together with a time-of-flight system and an electromagnetic calorimeter it is capable of identifying, in the energy region 0.3-5 GeV, antiprotons and positrons in the presence of a large background. To a good accuracy it measures both the charge and the velocity of the cosmic rays, and can be used to identify different isotopes with Z:1-10 in the energy range of 0.3-3 GeV/nucleon. This detector is planned to fly for 24 hours in the New Mexico State University Balloon Borne Magnet Facility in July 1994 from Lynn Lake in Canada.

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