Computer Science – Sound
Scientific paper
Feb 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976cajph..54..317w&link_type=abstract
Canadian Journal of Physics, vol. 54, Feb. 1, 1976, p. 317-321.
Computer Science
Sound
Balloon Sounding, Balloon-Borne Instruments, Cosmic Dust, Dust Collectors, Particle Size Distribution, Size Determination, Data Sampling, Funnels, Mylar (Trademark), Particle Flux Density
Scientific paper
The paper describes a balloon-borne system for collecting large (50 to a few hundred micrometers in the major dimension) solid particles falling through the atmosphere at an altitude of about 30 km which are postulated to be fragments of larger cosmic particles or bodies which disintegrate on entering the atmosphere. The major component of the system is the collection surface - a funnel, 7.2 m in diameter, fabricated from mylar, 12 microns thick, and lightly coated with aluminum. Also described is the sample collector, which collects the particles gathered in the apex of the cone. Two successful flights of short duration using zero-pressure balloons have been achieved. Some examples of particles collected are shown. Mg, Al, Si, S, K, Ca, Ti, and Fe have been detected in these particles by energy dispersive X-ray analysis.
Hallgren Douglas S.
Hemenway Curtis L.
Tackett C. D.
Wlochowicz R.
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