On testing laser ablation processes for asteroid deflection

Alison Gibbings, John-Mark Hopkins, David Burns, Massimiliano Vasile

Research output: Contribution to conferencePaper

Abstract

Laser surface ablation has been theoretically demonstrated to be an advantageous method in the potential mitigation and deflection of Near Earth Asteroids. However to fully verify this approach a series of experiments were performed that examined the development of the ejecta plume induced by each ablation event. This included the flow rate, velocity and dispersion as a function of the target material’s composition. The rate of degradation onto optical surfaces was also assessed. The results demonstrated the sensitivity of the ablation process to the specific laser characteristics and properties of the chosen target material. This is relative to the focal point of the laser, the volumetric removal of the ejected material, the material phase changes within the ablation volume and the dispersion of the ejecta plume.

Conference

ConferenceIAA Planetary Defense Conference, Protecting Earth from Asteroids: From threat to Action
CountryRomania
CityBucharest,
Period9/05/1112/05/11

Fingerprint

Asteroids
Laser Ablation
Ablation
Laser ablation
Deflection
Testing
Laser
Lasers
Phase Change Material
Target
Phase change materials
Flow Rate
Degradation
Earth (planet)
Flow rate
Verify
Series
Chemical analysis
Experiment
Experiments

Keywords

  • laser ablation
  • asteroid deflection

Cite this

Gibbings, A., Hopkins, J-M., Burns, D., & Vasile, M. (2011). On testing laser ablation processes for asteroid deflection. Paper presented at IAA Planetary Defense Conference, Protecting Earth from Asteroids: From threat to Action, Bucharest, , Romania.
Gibbings, Alison ; Hopkins, John-Mark ; Burns, David ; Vasile, Massimiliano. / On testing laser ablation processes for asteroid deflection. Paper presented at IAA Planetary Defense Conference, Protecting Earth from Asteroids: From threat to Action, Bucharest, , Romania.8 p.
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Gibbings, A, Hopkins, J-M, Burns, D & Vasile, M 2011, 'On testing laser ablation processes for asteroid deflection' Paper presented at IAA Planetary Defense Conference, Protecting Earth from Asteroids: From threat to Action, Bucharest, , Romania, 9/05/11 - 12/05/11, .

On testing laser ablation processes for asteroid deflection. / Gibbings, Alison; Hopkins, John-Mark; Burns, David; Vasile, Massimiliano.

2011. Paper presented at IAA Planetary Defense Conference, Protecting Earth from Asteroids: From threat to Action, Bucharest, , Romania.

Research output: Contribution to conferencePaper

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T1 - On testing laser ablation processes for asteroid deflection

AU - Gibbings, Alison

AU - Hopkins, John-Mark

AU - Burns, David

AU - Vasile, Massimiliano

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N2 - Laser surface ablation has been theoretically demonstrated to be an advantageous method in the potential mitigation and deflection of Near Earth Asteroids. However to fully verify this approach a series of experiments were performed that examined the development of the ejecta plume induced by each ablation event. This included the flow rate, velocity and dispersion as a function of the target material’s composition. The rate of degradation onto optical surfaces was also assessed. The results demonstrated the sensitivity of the ablation process to the specific laser characteristics and properties of the chosen target material. This is relative to the focal point of the laser, the volumetric removal of the ejected material, the material phase changes within the ablation volume and the dispersion of the ejecta plume.

AB - Laser surface ablation has been theoretically demonstrated to be an advantageous method in the potential mitigation and deflection of Near Earth Asteroids. However to fully verify this approach a series of experiments were performed that examined the development of the ejecta plume induced by each ablation event. This included the flow rate, velocity and dispersion as a function of the target material’s composition. The rate of degradation onto optical surfaces was also assessed. The results demonstrated the sensitivity of the ablation process to the specific laser characteristics and properties of the chosen target material. This is relative to the focal point of the laser, the volumetric removal of the ejected material, the material phase changes within the ablation volume and the dispersion of the ejecta plume.

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KW - asteroid deflection

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Gibbings A, Hopkins J-M, Burns D, Vasile M. On testing laser ablation processes for asteroid deflection. 2011. Paper presented at IAA Planetary Defense Conference, Protecting Earth from Asteroids: From threat to Action, Bucharest, , Romania.