Loading...
Please wait, while we are loading the content...
Similar Documents
Analysis of regolith simulant ejecta distributions from normal incident hypervelocity impact
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Cooke, William Edwards, David L. Suggs, Rob Moser, Danielle E. |
| Copyright Year | 2008 |
| Description | The National Aeronautics and Space Administration (NASA) has established the Constellation Program. The Constellation Program has defined one of its many goals as long-term lunar habitation. Critical to the design of a lunar habitat is an understanding of the lunar surface environment; of specific importance is the primary meteoroid and subsequent ejecta environment. The document, NASA SP-8013 'Meteoroid Environment Model Near Earth to Lunar Surface', was developed for the Apollo program in 1969 and contains the latest definition of the lunar ejecta environment. There is concern that NASA SP-8013 may over-estimate the lunar ejecta environment. NASA's Meteoroid Environment Office (MEO) has initiated several tasks to improve the accuracy of our understanding of the lunar surface ejecta environment. This paper reports the results of experiments on projectile impact into powdered pumice and unconsolidated JSC-1A Lunar Mare Regolith simulant targets. Projectiles were accelerated to velocities between 2.45 and 5.18 km/s at normal incidence using the Ames Vertical Gun Range (AVGR). The ejected particles were detected by thin aluminum foil targets strategically placed around the impact site and angular ejecta distributions were determined. Assumptions were made to support the analysis which include; assuming ejecta spherical symmetry resulting from normal impact and all ejecta particles were of mean target particle size. This analysis produces a hemispherical flux density distribution of ejecta with sufficient velocity to penetrate the aluminum foil detectors. |
| File Size | 2103558 |
| Page Count | 23 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20080031491 |
| Archival Resource Key | ark:/13960/t6xw9d61b |
| Language | English |
| Publisher Date | 2008-05-20 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Pumice Hypervelocity Projectiles Constellation Program Projectile Cratering Metal Foils Regolith Hypervelocity Impact Lunar Exploration Lunar Environment Meteorite Collisions Ejecta Space Habitats Environment Models Angular Distribution Lunar Surface Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
