Pulsed holography for hypervelocity impact diagnostics
| Autor: | B.D. Hansche, W.C. Sweatt, J.A. Ang, R.J. Hickman, C.H. Konrad, S.M. Gosling |
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| Rok vydání: | 1993 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Resolution (electron density) Holography Aerospace Engineering Ocean Engineering Laser law.invention Optics Impact crater Mechanics of Materials law Automotive Engineering Hypervelocity Safety Risk Reliability and Quality Ejecta business Event (particle physics) Image resolution Civil and Structural Engineering |
| Zdroj: | International Journal of Impact Engineering. 14:13-24 |
| ISSN: | 0734-743X |
| DOI: | 10.1016/0734-743x(93)90005-r |
| Popis: | Pulsed holography is being developed to meet two principal objectives. The first objective is to quantify the three dimensional characteristics of hypervelocity impact events, and the second is to provide a diagnostic with the ability to capture high fidelity information for the validation of sophisticated three-dimensional hydrocodes. The holographic system uses a Q-switched, seeded, frequency-doubled Nd-YAG laser which produces 5 ns, 750 mJ, coherent pulses at 532 nm. Holographic images have been captured of the back-surface debris bubble from 4 km/s perforating impacts and crater ejecta from 2 km/s non-perforating impacts. A prototype holographic reconstruction and image analysis system has been assembled that provides the ability to measure the structure and individual particles produced in a hypervelocity impact event. The estimated image resolution of this system is 10 to 20 {mu}m; however, this level of performance has not yet been demonstrated. |
| Databáze: | OpenAIRE |
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