Recent advances in laser ablation modelling for asteroid deflection methods

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

6 Citations (Scopus)

Abstract

Over the past few years, a series of studies have demonstrated the theoretical benefits of using laser ablation in order to mitigate the threat of a potential asteroid on a collision course with earth. Compared to other slow-push mitigation strategies, laser ablation allows for a significant reduction in fuel consumption since the ablated material is used as propellant. A precise modelling of the ablation process is however difficult due to the high variability in the physical parameters encountered among the different asteroids as well as the scarcity of experimental studies available in the literature. In this paper, we derive a new thermal model to simulate the efficiency of a laser-based detector. The useful material properties are first derived from thermochemical tables and equilibrium thermodynamic considerations. These properties are then injected in a 3D axisymetrical thermal model developed in Matlab. A temperature-dependent conduction flux is imposed on the exterior boundary condition that takes into account the balance between the incident power and the power losses due to the vaporization process across the Knudsen layer and the radiations respectively. A non-linear solver is finally used and the solution integrated over the ablation front to reconstruct the net thrust and the global mass flow. Compared to an initial 1D model, this new approach shows the importance of the parietal radiation losses in the case of a CW laser. Despite the low energy conversion efficiency, this new model still demonstrates the theoretical benefit of using lasers over more conventional low-thrust strategies.
LanguageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Subtitle of host publicationNanophotonics, Macrophotonics for Space Environments VIII
EditorsEdward W. Taylor, David A. Cardimona
Place of PublicationSan Diego, California
Volume9226
DOIs
Publication statusPublished - 17 Sep 2014
Event8th Nanophotonics and Macrophotonics for Space Environment Conference, NMSE 2014 - San Diego, United Kingdom
Duration: 18 Aug 201419 Aug 2014

Conference

Conference8th Nanophotonics and Macrophotonics for Space Environment Conference, NMSE 2014
CountryUnited Kingdom
CitySan Diego
Period18/08/1419/08/14

Fingerprint

Asteroids
Laser Ablation
Laser ablation
asteroids
Deflection
laser ablation
deflection
Thermal Model
Ablation
Laser
Radiation
Modeling
ablation
Thermodynamic Equilibrium
low thrust
lasers
3D Model
Conduction
Material Properties
fuel consumption

Keywords

  • laser ablation
  • asteroid deflection
  • thermal model

Cite this

Thiry, N., & Vasile, M. (2014). Recent advances in laser ablation modelling for asteroid deflection methods. In E. W. Taylor, & D. A. Cardimona (Eds.), Proceedings of SPIE - The International Society for Optical Engineering: Nanophotonics, Macrophotonics for Space Environments VIII (Vol. 9226). [922608] San Diego, California. https://doi.org/10.1117/12.2060810
Thiry, Nicolas ; Vasile, Massimiliano. / Recent advances in laser ablation modelling for asteroid deflection methods. Proceedings of SPIE - The International Society for Optical Engineering: Nanophotonics, Macrophotonics for Space Environments VIII. editor / Edward W. Taylor ; David A. Cardimona. Vol. 9226 San Diego, California, 2014.
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abstract = "Over the past few years, a series of studies have demonstrated the theoretical benefits of using laser ablation in order to mitigate the threat of a potential asteroid on a collision course with earth. Compared to other slow-push mitigation strategies, laser ablation allows for a significant reduction in fuel consumption since the ablated material is used as propellant. A precise modelling of the ablation process is however difficult due to the high variability in the physical parameters encountered among the different asteroids as well as the scarcity of experimental studies available in the literature. In this paper, we derive a new thermal model to simulate the efficiency of a laser-based detector. The useful material properties are first derived from thermochemical tables and equilibrium thermodynamic considerations. These properties are then injected in a 3D axisymetrical thermal model developed in Matlab. A temperature-dependent conduction flux is imposed on the exterior boundary condition that takes into account the balance between the incident power and the power losses due to the vaporization process across the Knudsen layer and the radiations respectively. A non-linear solver is finally used and the solution integrated over the ablation front to reconstruct the net thrust and the global mass flow. Compared to an initial 1D model, this new approach shows the importance of the parietal radiation losses in the case of a CW laser. Despite the low energy conversion efficiency, this new model still demonstrates the theoretical benefit of using lasers over more conventional low-thrust strategies.",
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Thiry, N & Vasile, M 2014, Recent advances in laser ablation modelling for asteroid deflection methods. in EW Taylor & DA Cardimona (eds), Proceedings of SPIE - The International Society for Optical Engineering: Nanophotonics, Macrophotonics for Space Environments VIII. vol. 9226, 922608, San Diego, California, 8th Nanophotonics and Macrophotonics for Space Environment Conference, NMSE 2014, San Diego, United Kingdom, 18/08/14. https://doi.org/10.1117/12.2060810

Recent advances in laser ablation modelling for asteroid deflection methods. / Thiry, Nicolas; Vasile, Massimiliano.

Proceedings of SPIE - The International Society for Optical Engineering: Nanophotonics, Macrophotonics for Space Environments VIII. ed. / Edward W. Taylor; David A. Cardimona. Vol. 9226 San Diego, California, 2014. 922608.

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

TY - CHAP

T1 - Recent advances in laser ablation modelling for asteroid deflection methods

AU - Thiry, Nicolas

AU - Vasile, Massimiliano

PY - 2014/9/17

Y1 - 2014/9/17

N2 - Over the past few years, a series of studies have demonstrated the theoretical benefits of using laser ablation in order to mitigate the threat of a potential asteroid on a collision course with earth. Compared to other slow-push mitigation strategies, laser ablation allows for a significant reduction in fuel consumption since the ablated material is used as propellant. A precise modelling of the ablation process is however difficult due to the high variability in the physical parameters encountered among the different asteroids as well as the scarcity of experimental studies available in the literature. In this paper, we derive a new thermal model to simulate the efficiency of a laser-based detector. The useful material properties are first derived from thermochemical tables and equilibrium thermodynamic considerations. These properties are then injected in a 3D axisymetrical thermal model developed in Matlab. A temperature-dependent conduction flux is imposed on the exterior boundary condition that takes into account the balance between the incident power and the power losses due to the vaporization process across the Knudsen layer and the radiations respectively. A non-linear solver is finally used and the solution integrated over the ablation front to reconstruct the net thrust and the global mass flow. Compared to an initial 1D model, this new approach shows the importance of the parietal radiation losses in the case of a CW laser. Despite the low energy conversion efficiency, this new model still demonstrates the theoretical benefit of using lasers over more conventional low-thrust strategies.

AB - Over the past few years, a series of studies have demonstrated the theoretical benefits of using laser ablation in order to mitigate the threat of a potential asteroid on a collision course with earth. Compared to other slow-push mitigation strategies, laser ablation allows for a significant reduction in fuel consumption since the ablated material is used as propellant. A precise modelling of the ablation process is however difficult due to the high variability in the physical parameters encountered among the different asteroids as well as the scarcity of experimental studies available in the literature. In this paper, we derive a new thermal model to simulate the efficiency of a laser-based detector. The useful material properties are first derived from thermochemical tables and equilibrium thermodynamic considerations. These properties are then injected in a 3D axisymetrical thermal model developed in Matlab. A temperature-dependent conduction flux is imposed on the exterior boundary condition that takes into account the balance between the incident power and the power losses due to the vaporization process across the Knudsen layer and the radiations respectively. A non-linear solver is finally used and the solution integrated over the ablation front to reconstruct the net thrust and the global mass flow. Compared to an initial 1D model, this new approach shows the importance of the parietal radiation losses in the case of a CW laser. Despite the low energy conversion efficiency, this new model still demonstrates the theoretical benefit of using lasers over more conventional low-thrust strategies.

KW - laser ablation

KW - asteroid deflection

KW - thermal model

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DO - 10.1117/12.2060810

M3 - Chapter (peer-reviewed)

SN - 9781628412536

VL - 9226

BT - Proceedings of SPIE - The International Society for Optical Engineering

A2 - Taylor, Edward W.

A2 - Cardimona, David A.

CY - San Diego, California

ER -

Thiry N, Vasile M. Recent advances in laser ablation modelling for asteroid deflection methods. In Taylor EW, Cardimona DA, editors, Proceedings of SPIE - The International Society for Optical Engineering: Nanophotonics, Macrophotonics for Space Environments VIII. Vol. 9226. San Diego, California. 2014. 922608 https://doi.org/10.1117/12.2060810