Physics – Plasma Physics
Scientific paper
Nov 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aps..dppuo4012h&link_type=abstract
American Physical Society, 49th Annual Meeting of the Division of Plasma Physics, November 12-16, 2007, abstract #UO4.012
Physics
Plasma Physics
Scientific paper
We are developing a new capability to carry out experiments on the shock processing of astrophysical dust grains and cratering of space hardware due to hypervelocity interplanetary dust particle (IDP) impacts. A 527 nm, 200 J laser launches a shock through a target consisting of a 25 μm plastic ablator followed by a 200 μm, 100 mg/cm^3 foam. Dust grains embedded near the rear surface of the foam experience pressures of ˜200 kbar in a <50 ps spike, simulating astrophysical pressure conditions in grain-grain collisions. A first experiment shows acceleration of 5 μm diameter Al2O3 dust grains to several km/s as measured by particle image velocimetry using a double-pulsed probe laser that is Mie-scattered off the grains. The grains were allowed to impact high-purity Cu foils where they caused abundant cratering, similar to what is seen on recovered space hardware after exposure to IDPs. The cratering is currently being studied in scanning electron microscopes and a preliminary analysis will be presented.
Breugel Wil van
Bringa Eduardo M.
Graham Giles A.
Hansen John Freddy
Kearsley Anton T.
No associations
LandOfFree
Shock-processing of astrophysical dust grains 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 Shock-processing of astrophysical dust grains, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shock-processing of astrophysical dust grains will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1697996