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Sphere-Wall Impact Experiments with Piezoelectric Force Sensors.
- Source :
- AIP Conference Proceedings; 4/28/2008, Vol. 997 Issue 1, p131-142, 12p, 1 Color Photograph, 1 Black and White Photograph, 3 Diagrams, 12 Charts, 6 Graphs
- Publication Year :
- 2008
-
Abstract
- Measurement of impulse imparted to a target from μs-timescale laser ablation events is often performed with piezoelectric force sensors. For pulsed laser ablation with a target resting on the force sensors, an effect can occur for a vertical thrust stand in an exhaust-up configuration that results in measurement of about twice the actual imparted impulse. A CO<subscript>2</subscript> laser operating at 10.6 μm wavelength, 300 ns pulse length, and up to 20 J pulse energy single shots was used to ablate samples of PCTFE. Force sensor measurements of the imparted impulse were compared to tests with a ballistic pendulum over a variety of fluences. The theoretical impulse delivered by the impacts of 6 mm diameter spheres of aluminum, steel, POM, and PTFE on the force sensor were studied, and the coefficients of restitution were measured for the targets. Practical issues for measurement of ablation-imparted impulse with piezoelectric sensors are discussed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0094243X
- Volume :
- 997
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- AIP Conference Proceedings
- Publication Type :
- Conference
- Accession number :
- 31896772
- Full Text :
- https://doi.org/10.1063/1.2931884