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Ablation Performance Experiments with Metal Seeded Polymers

Schall, W.O. and Tegel, J. and Eckel, Hans-Albert (2003) Ablation Performance Experiments with Metal Seeded Polymers. Third International Symposium on Beamed Energy Propulsion, Troy, New York, USA, 11.-14. Oktober 2004,.

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Abstract

The specific impulse of plain polymers has been found too low for application in pulsed laser propulsion for single stage to orbit flights. Therefore, ablation tests with polymers, seeded with Al and Mg powder in various concentrations to reduce the absorption depth, have been conducted with CO_2 pulses up to 280 J and ~12 µs pulse length to measure the coupling coefficient and specific impulse in air and in vacuum. A large and increasing loss of pulse energy, presumably deposited in a decoupled absorption wave, has been found for increasing laser pulse energy. This loss prevents the achievement of better results compared to unseeded material.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2004,
Title:Ablation Performance Experiments with Metal Seeded Polymers
Authors:
AuthorsInstitution or Email of Authors
Schall, W.O.UNSPECIFIED
Tegel, J.UNSPECIFIED
Eckel, Hans-AlbertUNSPECIFIED
Date:2003
Status:Published
Keywords:laser propulsion, lightcraft, laser ablation
Event Title:Third International Symposium on Beamed Energy Propulsion, Troy, New York, USA, 11.-14. Oktober 2004,
Organizer:Rensselaer Polytechnic Institute
HGF - Research field:Energy
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Energy
DLR - Program:L - no assignement
DLR - Research theme (Project):UNSPECIFIED
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Dr.rer.nat. Hans-Albert Eckel
Deposited On:16 Sep 2005
Last Modified:29 Apr 2010 20:36

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