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Laser impulse coupling measurements at 400 fs and 80 ps using the LULI facility at 1057 nm wavelength

Phipps, C.R. and Boustie, M. and Chevalier, J.-M. and Baton, S. and Brambrink, E. and Berthe, L. and Schneider, M. and Videau, L. and Boyer, S.A.E. and Scharring, Stefan (2017) Laser impulse coupling measurements at 400 fs and 80 ps using the LULI facility at 1057 nm wavelength. Journal of Applied Physics, 122, pp. 193103-1. American Institute of Physics (AIP). doi: 10.1063/1.4997196. ISSN 0021-8979.

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Official URL: https://doi.org/10.1063/1.4997196

Abstract

At the �Ecole Polytechnique « LULI » facility, we have measured the impulse coupling coefficient Cm (target momentum per joule of incident laser light) with several target materials in vacuum, at 1057 nm and 400 fs and 80 ps pulse duration. A total of 64 laser shots were completed in a two-week experimental campaign, divided between the two pulse durations and among the materials. Our main purpose was to resolve wide discrepancies among reported values for Cm in the 100 ps region, where many applications exist. A secondary purpose was to compare Cm at 400 fs and 80 ps pulse duration. The 80 ps pulse was obtained by partial compression. Materials were Al, Ta, W, Au, and POM (polyoxymethylene, trade name Delrin). One application of these results is to pulsed laser ablation propulsion in space, including space debris re-entry, where narrow ranges in Cm and specific impulse Isp spell the difference between dramatic and uneconomical performance. We had difficulty measuring mass loss from single shots. Imparted momentum in single laser shots was determined using pendulum deflection and photonic Doppler velocimetry. Cm was smaller at the 400 fs pulse duration than at 80 ps. To our surprise, Cm for Al at 80 ps was at most 30N/MW with 30 kJ/m^2 incident fluence. On the other extreme, polyoxymethylene (POM, trade name Delrin) demonstrated 770N/MW under these conditions. Together, these results offer the possibility of designing a Cm value suited to an application, by mixing the materials appropriately.

Item URL in elib:https://elib.dlr.de/117451/
Document Type:Article
Title:Laser impulse coupling measurements at 400 fs and 80 ps using the LULI facility at 1057 nm wavelength
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Phipps, C.R.CRPhipps (at) aol.comUNSPECIFIED
Boustie, M.UNSPECIFIEDUNSPECIFIED
Chevalier, J.-M.UNSPECIFIEDUNSPECIFIED
Baton, S.UNSPECIFIEDUNSPECIFIED
Brambrink, E.UNSPECIFIEDUNSPECIFIED
Berthe, L.UNSPECIFIEDUNSPECIFIED
Schneider, M.UNSPECIFIEDUNSPECIFIED
Videau, L.UNSPECIFIEDUNSPECIFIED
Boyer, S.A.E.UNSPECIFIEDUNSPECIFIED
Scharring, StefanStefan.Scharring (at) dlr.deUNSPECIFIED
Date:2017
Journal or Publication Title:Journal of Applied Physics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:122
DOI :10.1063/1.4997196
Page Range:pp. 193103-1
Publisher:American Institute of Physics (AIP)
ISSN:0021-8979
Status:Published
Keywords:Laser Propulsion, Impulse Coupling Coefficient, Specific Impulse, Residual Heat, Ultrashort Laser Pulses, Short Laser Pulses, High Energy Laser, Space Debris Removal
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Laser Research and Technology (old)
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics > Studies and Concepts
Deposited By: Scharring, Stefan
Deposited On:08 Jan 2018 10:07
Last Modified:18 Dec 2019 04:19

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