1. Millimetric granular craters from pulsed laser ablation.
- Author
-
Marston, J. O. and Pacheco-Vázquez, F.
- Subjects
- *
LASER ablation , *IMPACT craters , *PHYSICAL contact , *CRATERING - Abstract
This Rapid Communication reports on an experimental study of granular craters formed by a mechanism, namely, optical energy, via a pulsed laser focused onto the surface of a granular bed. This represents an insight into granular cratering for two reasons; first, there is no physical contact between the initiation mechanism and the granular media (as typical for impact or explosion craters). Second, the resulting craters are millimetric in scale, which facilitates a test of energy scalings down to a previously unobserved lengthscale. Indeed, we observe a range of energy scalings conforming to Dc∼Eβ with β≈0.31-0.43 depending on the characteristics of the granular media. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF