Meteoroid protection for the Comet Halley probe

Details Meteoroid protection for the Comet Halley probe Meteoroid protection for the Comet Halley probe

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979esasp.153...73h&link_type=abstract

In ESA Comet Halley Micrometeoroid Hazard Workshop p 73-76 (SEE N80-22200 12-91)

Physics

Halley'S Comet, Impact Damage, Meteoritic Damage, Meteoroid Protection, Space Probes, Spacecraft Shielding, Aluminum, Flyby Missions, Honeycomb Structures, Hypervelocity Impact, Impact Resistance, Thickness

Scientific paper

The high closing speed of 57km/s between the spacecraft and Halley poses special problems in the design of the required meteoroid protection. A double wall structure with a total thickness equal to 0.1 to 1 times the diameter of the largest meteoroid encountered is sufficient to stop that meteoroid. However, the unusually high number of meteoroid impacts on the Halley probe will cause significant erosion of the outer wall so that failure of the second wall is more likely to occur from a small meteoroid passing through a previously created hole in the outer wall and then penetrating the second wall. Calculations of the shielding required based on this failure mode, show that a double wall structure must actually have a total thickness 1.2 to 7.3 times the diameter of the largest meteoroid encountered, depending on the size distribution of the meteoroids.

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