https://sam.ensam.eu:443 The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. Mon, 11 May 2026 14:45:41 GMT 2026-05-11T14:45:41Z http://hdl.handle.net/10985/15421 Transfers from Earth to LEO and LEO to interplanetary space using lasers PHIPPS, Claude R.; BONNAL, Christophe; MASSON, Frédéric; BOUSTIE, Michel; BERTHE, Laurent; BATON, Sophie D.; BRAMBRINK, Erik; CHEVALIER, Jean Marc; VIDEAU, Laurent; BOYER, Séverine A.E; SCHNEIDER, Matthieu New data on some materials at 80ps pulse duration and 1057 nm wavelength give us the option of proportionally combining them to obtain arbitrary values between 35 (aluminum) and 800 N/MW (POM, polyoxymethylene) for momentum coupling coefficient Cm. Laser ablation physics lets us transfer to LEO from Earth, or to interplanetary space using repetitively pulsed lasers and Cm values appropriate for each mission. We discuss practical results for lifting small payloads from Earth to LEO, and space missions such as a cis-Mars orbit with associated laser system parameters. Mon, 01 Jan 2018 00:00:00 GMT http://hdl.handle.net/10985/15421 2018-01-01T00:00:00Z PHIPPS, Claude R. BONNAL, Christophe MASSON, Frédéric BOUSTIE, Michel BERTHE, Laurent BATON, Sophie D. BRAMBRINK, Erik CHEVALIER, Jean Marc VIDEAU, Laurent BOYER, Séverine A.E SCHNEIDER, Matthieu New data on some materials at 80ps pulse duration and 1057 nm wavelength give us the option of proportionally combining them to obtain arbitrary values between 35 (aluminum) and 800 N/MW (POM, polyoxymethylene) for momentum coupling coefficient Cm. Laser ablation physics lets us transfer to LEO from Earth, or to interplanetary space using repetitively pulsed lasers and Cm values appropriate for each mission. We discuss practical results for lifting small payloads from Earth to LEO, and space missions such as a cis-Mars orbit with associated laser system parameters. http://hdl.handle.net/10985/15739 Laser impulse coupling measurements at 400 fs and 80 ps using the LULI facility at 1057 nm wavelength PHIPPS, Claude R.; BOUSTIE, Michel; CHEVALIER, Jean Marc; BATON, Sophie D.; BRAMBRINK, Erik; BERTHE, Laurent; SCHNEIDER, Matthieu; VIDEAU, Laurent; BOYER, Séverine A.E.; SCHARRING, Stefan At the École 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 30 N/MW with 30 kJ/m2 incident fluence. On the other extreme, polyoxymethylene (POM, trade name Delrin) demonstrated 770 N/MW under these conditions. Together, these results offer the possibility of designing a Cm value suited to an application, by mixing the materials appropriately. Sun, 01 Jan 2017 00:00:00 GMT http://hdl.handle.net/10985/15739 2017-01-01T00:00:00Z PHIPPS, Claude R. BOUSTIE, Michel CHEVALIER, Jean Marc BATON, Sophie D. BRAMBRINK, Erik BERTHE, Laurent SCHNEIDER, Matthieu VIDEAU, Laurent BOYER, Séverine A.E. SCHARRING, Stefan At the École 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 30 N/MW with 30 kJ/m2 incident fluence. On the other extreme, polyoxymethylene (POM, trade name Delrin) demonstrated 770 N/MW under these conditions. Together, these results offer the possibility of designing a Cm value suited to an application, by mixing the materials appropriately. http://hdl.handle.net/10985/25842 Impulse coupling measurement of metallic and carbon targets during laser ablation through ballistic pendulum experiments and simulations LE BRAS, Corentin; BERTHE, Laurent; VIDEAU, Laurent; BATON, Sophie D.; BOUSTIE, Michel; BOYER, Séverine A.E.; ROUSSEAUX, Christophe; BRAMBRINK, Erik; CHEVALIER, Jean Marc; HOUY, J.; AUBERT, Bertrand; JODAR, Benjamin; LOISON, Didier; HEBERT, David Laser ablation propulsion and orbit cleaning are developing areas of research. The general aim of laser-based techniques applied to this field is to maximize the momentum transfer produced by a laser shot. This work presents results from ballistic pendulum experiments under vacuum on aluminum, copper, tin, gold, and porous graphite targets. The work has focused on the metrology of the laser experiments to ensure good stability over a wide range of laser parameters (laser intensity ranging from 4 GW/cm2 to 8.7 TW/cm2, pulse duration from 80 ps to 15 ns, and wavelengths of 528 or 1057 nm). The results presented compile data from three experimental campaigns spanning from 2018 to 2021 on two different laser platforms and using different pulse durations, energies, and wavelengths. The study is complemented by the simulation of the momentum from the mono-dimensional Lagrangian code ESTHER. The first part of this work gives a detailed description of the experimental setup used, the ESTHER code, and the treatment of the simulations. The second part focuses on the experimental results. The third part describes the simulation results and provides a comparison with the experimental data. The last part presents possible improvements for future work on the subject. Mon, 01 Apr 2024 00:00:00 GMT http://hdl.handle.net/10985/25842 2024-04-01T00:00:00Z LE BRAS, Corentin BERTHE, Laurent VIDEAU, Laurent BATON, Sophie D. BOUSTIE, Michel BOYER, Séverine A.E. ROUSSEAUX, Christophe BRAMBRINK, Erik CHEVALIER, Jean Marc HOUY, J. AUBERT, Bertrand JODAR, Benjamin LOISON, Didier HEBERT, David Laser ablation propulsion and orbit cleaning are developing areas of research. The general aim of laser-based techniques applied to this field is to maximize the momentum transfer produced by a laser shot. This work presents results from ballistic pendulum experiments under vacuum on aluminum, copper, tin, gold, and porous graphite targets. The work has focused on the metrology of the laser experiments to ensure good stability over a wide range of laser parameters (laser intensity ranging from 4 GW/cm2 to 8.7 TW/cm2, pulse duration from 80 ps to 15 ns, and wavelengths of 528 or 1057 nm). The results presented compile data from three experimental campaigns spanning from 2018 to 2021 on two different laser platforms and using different pulse durations, energies, and wavelengths. The study is complemented by the simulation of the momentum from the mono-dimensional Lagrangian code ESTHER. The first part of this work gives a detailed description of the experimental setup used, the ESTHER code, and the treatment of the simulations. The second part focuses on the experimental results. The third part describes the simulation results and provides a comparison with the experimental data. The last part presents possible improvements for future work on the subject.