Imaging Ejecta and Debris Cloud Behavior Using Laser Side-lighting
- Mihaly, J.M.
- Rosakis, A.J.
- Adams, M.A.
- Tandy, J.T.
DOIAbstract
AbstractThe Caltech Small Particle Hypervelocity Impact Range (SPHIR Facility) utilizes a two-stage, light gas gun to accelerate Nylon 6/6 right cylinders (d = 1.8mm, L/D=1, 5.5mg) and spheres (d = 1.8mm, 3.6mg) to impact speeds of 5km/s and above. The projectiles impact aluminum 6061-T6 plate targets. An optical technique was employed to produce images of the hypervelocity impact event with short exposure times (20ns) and short inter-frame times (<1μs). The technique uses coherent illumination, orthogonal to the projectile flight direction, to provide a series of shadowgraph images of the impact on the target. An expanded beam from a 532nm continuous wave laser is used as the illumination source. The beam is expanded to illuminate a 10cm d...
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