Computer Science – Performance
Scientific paper
Jan 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996phdt.........4p&link_type=abstract
Thesis (PH.D.)--UNIVERSITY OF ALABAMA IN HUNTSVILLE, 1996.Source: Dissertation Abstracts International, Volume: 57-03, Section:
Computer Science
Performance
Scientific paper
The design features and performance from the first flight (by balloon) of the spherical geometry BUGS IV (Bristol University Gas Scintillator) cosmic ray detector are presented. The detector was designed to measure with good resolution the primary cosmic ray charge and energy spectra of nuclei from oxygen to iron with energies between 0.4 GeV/n to ~ 500 GeV/n. BUGS IV employed several unique features including a 1-meter radius drift chamber to create an instrument of low mass (3.5 g/cm^2) thereby minimizing the loss from nuclear interactions. From one simple measurement of the drift time, the impact parameter could be calculated and a trajectory correction for all detector elements determined. The combination of the drift chamber with two solid and two gas Cerenkov radiators led to a large (4.43 m^2 sr) geometric factor. Despite electronics problems (unrelated to the design) which developed during the flight, it is shown that the BUGS IV design concept worked well. Unfortunately the instrument was destroyed by fire during landing. However, the data has provided valuable guidance for the construction of a BUGS V instrument.
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