Jan 1, 2011 · Ejecta were collected in bins at various distances from the impact. The observed nearly-90° ejection angle and the fall-distance to the chamber floor were used to calculate the ejection velocity of material in the collection bins. The …

Mar 1, 2022 · The amount by which crater ejecta enhances asteroid deflection—that is, the momentum of the crater ejecta that escapes the gravitational attraction of the target body divided by the impactor momentum (β − 1)—has been found to vary significantly depending on the target asteroid’s properties, composition and structure (e.g., Jutzi and ...

Mar 1, 2019 · As an example, Fig. 3 shows the ejecta velocity histogram with cumulative size distribution for a Cu projectile impacting on a sandstone target. A luminescent transient plasma plume followed by a steepening ejecta cone and completed by the detachment of spall fragments characterizes the typical evolution of ejecta [12]. The high-speed camera ...

Sep 1, 2024 · Impact cratering is an important geological process on Earth. This review summarizes the state of knowledge of the Precambrian (Hadean, Archean, and P…

May 1, 2014 · Martian impact craters often exhibit unique ejecta morphologies relative to ballistically-dominated ejecta observed in lunar and mercurian impact craters (Carr et al., 1977, Schultz and Gault, 1979): martian lobate ejecta deposits frequently have distinctive ejecta deposit boundaries rather than an ejecta deposit of gradational thickness, and appear to have been …

May 1, 2022 · This ejecta phenomenon has been extensively investigated [4], owing to its important role in many fields, including inertial confinement fusion, explosion damage, and pyrotechnics. Many experimental approaches are applied in this field, such as Asay foil, piezoelectric probe, X-ray/proton radiography, Mie scattering, and photon Doppler ...

Jan 1, 2018 · The various ejecta facies were then examined in more detail using ∼0.5–1 m per pixel LROC Narrow Angle Camera (NAC) images (Robinson et al., 2010) to better define the facies boundaries and focus in on specific details and areas of interest. The individual images used to observe the morphology of Orientale ejecta were selected based on ...

Oct 15, 2011 · Ejecta deposits very poorly exposed and eroded in close proximity to the crater rim. In the Tyasmin River valley ~ 6–8 km outside the crater rim, low shock, melt-free “monomict” breccias are overlain by polymict breccias (Gurov et al., 2003). Both breccias comprise crystalline rocks; polymict breccias contain more highly shocked material.

Dec 1, 2024 · The primary component of battery initial ejecta is EMC, with a phase ratio of ejecta gas to liquid of 4.92:1. (2) In the ejecta from two phases of the battery, EMC has the lowest explosion limit and optimal explosion concentration, at 2.85 % and 8.6 % respectively, making it the most prone to explosion with maximum explosive power.

May 1, 2024 · Ejecta with Stokes number S t k ≪ 1 is expected to follow the flow, whereas ejecta with S t k ≫ 1 has a motion independent of the surrounding flow field. The Stokes number for the mean size of the ejecta and the range of velocities is S t k ≈ 5500, which implies that the ejecta would follow a ballistic path given an initial momentum impulse.