SELECTION OF APPARATUS FOR A RE-ENTRY SAMPLING EXPERIMENT,
Abstract
A general survey of apparatus used on aircraft, balloons and rockets to sample particulate matter in the stratosphere has been performed. The various approaches have been evaluated with respect to possible use in a re-entry burnup experiment to sample a non-radioactive tracer element. Results indicate that no existing collector can, at this time, be definitely identified as suitable for the experiment. For sampling at altitudes below 70,000 feet, the existing sampler considered most nearly suitable is the aircraft (U-2) hatch filter sampler. With respect to sampling altitudes above 70,000 feet, the AEC balloon-borne, ejector-powered, filter and impactor collectors offer the most promise. No samplers presently in use offer the degree of protection from contamination needed in the re-entry experiment. Ways of shielding and cleaning samplers have been investigated. Sampler decontamination studies show that particles impacted at high velocities on metal surfaces are not easily removed by conventional cleani5g methods. An alternative approach using strippable plastic films to seal contamination in appears feasible. A ram-air operated, twostage isokinetic impactor probe is described. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1963
- Accession Number
- AD0422097
Entities
People
- A. R. Mcfarland
- R. C. Wood