BALLOON-BORNE PARTICULATE FRACTIONATOR.
Final rept. 1 Jan-31 Dec 59,
GENERAL MILLS INC MINNEAPOLIS MN
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This report describes work done by General Mills Mechanical Division in the design, fabrication and testing of a balloon-borne dust sampling system. The purpose of the sampling system is to collect radioactive dust and meteoritic particles in the micron and submicron size ranges. The system samples the air continuously as the balloon rises in the altitude range from 30,000 to 100,000 feet. The particle collection apparatus consists of four units with each unit designed to be used over a given altitude range. Each unit employs two impactors and a filter in a series arrangement. The impactors collect the atmospheric dust on round slides and are designed for given particle size ranges.
- Test Facilities, Equipment and Methods