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Update on CO2 Laser Ablation of Polyoxymethylene

Sinko, John Elihu and Sasoh, Akihiro and Ogita, Naoya and Scharring, Stefan and Eckel, Hans-Albert and Röser, Hans-Peter (2010) Update on CO2 Laser Ablation of Polyoxymethylene. In: AIP Conference Proceedings. American Institute of Physics, Melville, NY. High Power Laser Ablation 8, 18.-22. April 2010, Santa Fe, New Mexico, USA.

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Abstract

Polyoxymethylene (POM) propellants have been studied since the 1970's, and perhaps represent the most promising match of a propellant to the CO2 laser for laser propulsion studies. Applications range from ground-launch of laser propulsion vehicles at atmospheric pressure to spacebased laser ablation propulsion microthrusters. In this paper we broadly update the state of understanding of CO2 laser ablation of POM based on new experiments conducted in Japan and Germany, with a focus on the basic physics of ablation of flat POM targets. Measurements using 10 J-class and 100 J-class lasers are compared to previous literature results for ablation of POM. Emphasis is placed on the influence of control parameters on ablation, especially the incident laser fluence and ambient pressure. New results highlight the influence of the ambient pressure on ablation physics from the vaporization threshold to the plasma regime, and clarify the role of the fluence in determining ablation behavior in air and vacuum environments. Imparted impulse and ablated mass were measured at the target using piezoelectric force sensors, impulse pendulums, and scientific balances. The new experimental investigations cover orders of magnitude in fluence (10E-2 to 10E3 J/cm2) and ambient pressure (10E-3 to 10E5 Pa).

Document Type:Conference or Workshop Item (Speech)
Title:Update on CO2 Laser Ablation of Polyoxymethylene
Authors:
AuthorsInstitution or Email of Authors
Sinko, John ElihuMicro-Nano Global Center of Excellence, Graduate School of Engineering, Nagoya, Japan
Sasoh, AkihiroDepartment of Aerospace Engineering, Nagoya University, Japan
Ogita, NaoyaDepartment of Aerospace Engineering, Nagoya University, Japan
Scharring, Stefanstefan.scharring@dlr.de
Eckel, Hans-Alberthans-albert.eckel@dlr.de
Röser, Hans-PeterInstitut für Raumfahrtsysteme, Universität Stuttgart
Date:2010
Journal or Publication Title:AIP Conference Proceedings
Refereed publication:Yes
In ISI Web of Science:Yes
Editors:
EditorsEmail
Phipps, ClaudePhotonic Associates, LLC
Publisher:American Institute of Physics, Melville, NY
Status:Accepted
Keywords:Laser ablation, Impulse measurement, Laser propulsion, Laser Matter Interaction
Event Title:High Power Laser Ablation 8
Event Location:Santa Fe, New Mexico, USA
Event Type:international Conference
Event Dates:18.-22. April 2010
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Laser Research and Technology
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Stefan Scharring
Deposited On:17 May 2010 10:26
Last Modified:09 Aug 2013 11:56

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