Investigations of rf Emissions from Hypervelocity Impacts of Various Metals
| Autor: | William Broad, Mark Schmidt, William. T. Brown |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
Materials science
business.industry Electromagnetic spectrum chemistry.chemical_element Titanium alloy OREX General Medicine Structural engineering Copper Fragmentation l law.invention Hypervelocity Impact chemistry Aluminium law Electric field Light-gas gun Hypervelocity SPHERES Electromagnetic Emissions Composite material business Engineering(all) |
| Zdroj: | Procedia Engineering. :418-423 |
| ISSN: | 1877-7058 |
| DOI: | 10.1016/j.proeng.2013.05.048 |
| Popis: | We describe a series of experiments to examine emissions in the radio-frequency (RF) portion of the electromagnetic spectrum, resulting from hyper-velocity impacts of various metals. A two-stage gas gun was used to impact aluminium (6061-T6) spheres, at velocities of approximately 6 km/s and 9 km/s, against aluminium/titanium alloy (Ti6Al4 v) target plates. In most experiments, debris ejected from the rear surfaces of target plates impacted against witness plates of various metals (aluminium, copper, zinc, etc). The witness plates were placed at various distances from rear surfaces of target plates, and electric field probes were used to obtain measurements of three near-field orthogonal components of the electric fields at sampling rates of 10 giga-samples/s. From experimental and computational results, we have developed a semi-empirical model describing dependence of the electric field amplitude and frequency on material strength and impact conditions. |
| Databáze: | OpenAIRE |
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