Physics
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994metic..29q.446b&link_type=abstract
Meteoritics (ISSN 0026-1114), vol. 29, no. 4, p. 446
Physics
Capture Effect, Cratering, Hypervelocity Impact, Impact Damage, Micrometeoroids, Particle Size Distribution, Eureca (Esa), Foams, Metal Surfaces, Particle Mass, Solar System Evolution
Scientific paper
The HVI (HyperVelocity Impact) experiment was developed and flown as part of TImeband Capture Cell Experiment (TICCE) on the EURECA-1 payload. It was conducted in order to better understand the spatial density as a function of size for the different types of particles present, for micrometer-sized or larger particles. In addition to the enumeration of particle impacts, and identification of the main properties of the impacting particles, it was the intent of the passive part of the experiment that hypervelocity particles be captured and returned intact, or as melted residues, in order to analyze them in detail in the lab. For this purpose, two types of collectors have been exposed. First, high-purity metallic surfaces (Au and Ni) have been used for the collection of all grains down to sub-micrometer sizes. During the impact the particle is destroyed, its remnants being mixed with the target material and concentrating in the impact crater. As a second type of collector, polymer foams have been employed for capturing particles with minimum degradation. The impact of a hypervelocity projectile (greater than 3 km/s) is a process that results, both for the impactor and the impacted material, in large stresses causing, for normal densities, a large degree of fragmentation, melting, vaporization, and ionization; such stresses are directly related to the density relationship between the projectile and target materials and a high-density impactor on a low-density target will experience the lowest level of damage. Since EURECA-1 was in orbit for approximately one year, there should be approximately 50,000 impacts/sq m, in the micrometers size range, only about 10% of which could be of extraterrestrial origin. For collecting these particles, the HVI experiment includes 24 sq cm of high-purity metallic surfaces plus 200 sq cm of polymer micropore foam. Visual impacts are observed in various parts of the HVI experiment; the largest impact crater has a about 1.5-mm diameter.
Borg Janet
Maag Carl
No associations
LandOfFree
Description of the EURECA-1/TICCE-HVI passive experiment does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Description of the EURECA-1/TICCE-HVI passive experiment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Description of the EURECA-1/TICCE-HVI passive experiment will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-822095