Other
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icar..154..402k&link_type=abstract
Icarus, Volume 154, Issue 2, pp. 402-411 (2001).
Other
12
Scientific paper
We performed impact experiments into ice-silicate surfaces using the plasmadynamic accelerator and the electrothermal accelerator of the Fachbereich Raumfahrt of the Technische Universität München. Projectile velocities varied between 0.9 and 11.4 km/s, and masses between 1.7.10-11 kg and 7.2.10-10 kg at the plasma accelerator and between 1.1 and 3.3 km/s and 6.10-6 kg to 3.10-5 kg at the electrothermal accelerator. Projectile materials were glass at the plasma accelerator, and nylon at the electrothermal accelerator. The kinetic energies ranged over 6 orders of magnitude, from 8.8.10-5 J to 70 J. The target temperature was 250 K+/-5 K. Witness films were used to determine the size and the position of ejecta particles. The ejecta velocities were determined by piezo detectors. The maximum velocities of the ejecta particles observed were in the order of several 100 m/s, independent on the projectile velocity. At about 60° to 65° ejection angle to the target surface, velocities were highest (about 700 to 800 m/s), at lower and higher angles, the maximum velocity decreased. The cumulative ejecta mass smaller than a given size follows power laws. Three distinct slopes were observed. For particle sizes smaller than about 10 μm, the average slope was 2.2, for ca. 10 μm to 20 μm, the average slope was 12, and for particles larger than about 20 μm, the average slope was 1.4. The high slope between 10 and 20 μm indicates a comparably high number of particles in this size regime. This is a result of only partially or nondestroyed silicate particles, which originally had a size in this range. The total mass ejected at a given angle can be approximated by a Gaussian distribution with a maximum at ~70° to the target surface. We combined the empirically found distributions into a formula which allows the calculation of the mass ejected in a given ejection angle range with a given size range as a function of the projectile and target properties. .
Grün Eberhard
Koschny Detlef
No associations
LandOfFree
Impacts into Ice-Silicate Mixtures: Ejecta Mass and Size Distributions 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 Impacts into Ice-Silicate Mixtures: Ejecta Mass and Size Distributions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impacts into Ice-Silicate Mixtures: Ejecta Mass and Size Distributions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1104053