| Autor: |
Myrabo, L. N., Lyons, P. W., Jones, R. A., Liu, S., Manka, C. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 11/10/2011, Vol. 1402 Issue 1, p187-206, 20p |
| Abstrakt: |
This basic research study examines the physics of airbreathing laser propulsion at the extreme flux range of 1-2×1011 W/cm2-within the air breakdown threshold for l μm radiation-using the terawatt PHAROS III neodymium-glass pulsed laser. Six different experimental setups were tested using a 34 mm line focus with 66 μm focal waist, positioned near the flat impulse surface. The first campaign investigated impulse generation with the beam oriented almost normal to the target surface, with energies ranging from 23 to 376 J, and pulses of 5 to 30 ns FWHM. Air breakdown/ plasma dynamics were diagnosed with GOI cameras and color photography. Laser generated impulse was quantified with both vertical pendulums and piezoelectric pressure transducers using the standard performance metric, CM-the momentum coupling coefficient. Part 1 of this 2-part paper covers Campaign [sharp/mesh/hash_synonym]1 results including laser plasma diagnostics, pressure gage and vertical pendulum data. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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