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Title: Sphere-Wall Impact Experiments with Piezoelectric Force Sensors

Abstract

Measurement of impulse imparted to a target from {mu}s-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{sub 2} laser operating at 10.6 {mu}m 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.

Authors:
;  [1]
  1. UAH Laser Propulsion Group, The University of Alabama in Huntsville, Physics Department, OB-201B John Wright Dr., Huntsville, AL 35899 (United States)
Publication Date:
OSTI Identifier:
21137097
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 997; Journal Issue: 1; Conference: 5. international symposium on beamed energy propulsion, Kailua-Kona, HI (United States), 12-15 Nov 2007; Other Information: DOI: 10.1063/1.2931884; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABLATION; ALUMINIUM; CARBON DIOXIDE LASERS; LASER RADIATION; PIEZOELECTRICITY; POLYTETRAFLUOROETHYLENE; PULSES; SENSORS; STEELS; WAVELENGTHS

Citation Formats

Sinko, John E, and Lassiter, Jonathan S. Sphere-Wall Impact Experiments with Piezoelectric Force Sensors. United States: N. p., 2008. Web. doi:10.1063/1.2931884.
Sinko, John E, & Lassiter, Jonathan S. Sphere-Wall Impact Experiments with Piezoelectric Force Sensors. United States. https://doi.org/10.1063/1.2931884
Sinko, John E, and Lassiter, Jonathan S. 2008. "Sphere-Wall Impact Experiments with Piezoelectric Force Sensors". United States. https://doi.org/10.1063/1.2931884.
@article{osti_21137097,
title = {Sphere-Wall Impact Experiments with Piezoelectric Force Sensors},
author = {Sinko, John E and Lassiter, Jonathan S},
abstractNote = {Measurement of impulse imparted to a target from {mu}s-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{sub 2} laser operating at 10.6 {mu}m 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.},
doi = {10.1063/1.2931884},
url = {https://www.osti.gov/biblio/21137097}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 997,
place = {United States},
year = {Mon Apr 28 00:00:00 EDT 2008},
month = {Mon Apr 28 00:00:00 EDT 2008}
}