Velocity distributions of high-velocity ejecta from regolith targets

Details Velocity distributions of high-velocity ejecta from regolith targets Velocity distributions of high-velocity ejecta from regolith targets

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005icar..178..264y&link_type=abstract

Icarus, Volume 178, Issue 1, p. 264-273.

Other

5

Scientific paper

We measured the velocity distributions of impact ejecta with velocities higher than ˜100 m s-1 (high-velocity ejecta) for impacts at variable impact angle α into unconsolidated targets of small soda-lime glass spheres. Polycarbonate projectiles with mass of 0.49 g were accelerated to ˜250 m s-1 by a single-stage light-gas gun. The impact ejecta are detected by thin aluminum foils placed around the targets. We analyzed the holes on the aluminum foils to derive the total number and volume of ejecta that penetrated the aluminum foils. Using the minimum velocity of the ejecta for penetration, determined experimentally, the velocity distributions of the high-velocity ejecta were obtained at α=15°, 30°, 45°, 60°, and 90°. The velocity distribution of the high-velocity ejecta is shown to depend on impact angle. The quantity of the high-velocity ejecta for vertical impact (α=90°) is considerably lower than derived from a power-law relation for the velocity distribution on the low-velocity ejecta (less than 10 m s-1). On the other hand, in oblique impacts, the quantity of the high-velocity ejecta increases with decreasing impact angle, and becomes comparable to those derived from the power-law relation. We attempt to scale the high-velocity ejecta for oblique impacts to a new scaling law, in which the velocity distribution is scaled by the cube of projectile radius (scaled volume) and a horizontal component of impactor velocity (scaled ejection velocity), respectively. The high-velocity ejecta data shows a good correlation between the scaled volume and the scaled ejection velocity.

Affiliated with

Also associated with

No associations

Rating

Velocity distributions of high-velocity ejecta from regolith targets 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 Velocity distributions of high-velocity ejecta from regolith targets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Velocity distributions of high-velocity ejecta from regolith targets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1634082