2015 IEEE Aerospace Conference 2015
DOI: 10.1109/aero.2015.7119018
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Directed energy planetary defense

Abstract: Directed Energy (DE) systems offer the potential for true planetary defense from small to km class threats. Directed energy has evolved dramatically recently and is on an extremely rapid ascent technologically. It is now feasible to consider DE systems for threats from asteroids and comets. DE-STAR (Directed Energy System for Targeting of Asteroids and exploRation) is a phased-array laser directed energy system intended for illumination, deflection and compositional analysis of asteroids [1]. It can be configu… Show more

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Cited by 9 publications
(14 citation statements)
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“…Model results indicate a solid theoretical foundation supporting the proposed method. 3,10,21,22,23 The model suggests that vaporization commences within 1 second; the thermal profile stabilizes at a level consistent with the vaporization temperature of Silica in vacuum. Temperatures within the illuminated spot rise to the point of being mass ejection limited, which is ~2 250 K in the center of the spot.…”
Section: Composition Of Solar System Objectsmentioning
confidence: 75%
See 1 more Smart Citation
“…Model results indicate a solid theoretical foundation supporting the proposed method. 3,10,21,22,23 The model suggests that vaporization commences within 1 second; the thermal profile stabilizes at a level consistent with the vaporization temperature of Silica in vacuum. Temperatures within the illuminated spot rise to the point of being mass ejection limited, which is ~2 250 K in the center of the spot.…”
Section: Composition Of Solar System Objectsmentioning
confidence: 75%
“…Results from a multi-physics model of a spherical bolide of micro-crystalline Silica (SiO 2 ). 21,23 Model features include radiation, conduction and mass ejection. Left: Conceptual illustration of a directed energy beam impinging on an asteroid; surface material is ejected from the heated spot, creating a plume.…”
Section: Figurementioning
confidence: 99%
“…We will assume later that β =1 but it is important to keep this enhancement possibility in mind to be fair. The change of speed is thus: ΔV = β·mv/M = β·v (m/M) (8) The deflection distance at the Earth is approximately: Δx impactor = 3 ΔV·τ impact = 3· β·v·τ impact (m/M) (9) where the factor of 3 is the same approximation used from orbital dynamics but as we have shown in several of our papers it is not always a good approximation (Zhang et al, 2015-1, Zhang et al, 2015 We use it here for analytic purposes for simplicity and because it is often used in mission planetary defense planning exercises. We also note that for impactors there can be an additional effect do the mass ejection upon impact.…”
Section: Impactor Comparisonmentioning
confidence: 98%
“…Fluctuations in the Earth's atmosphere significantly hinder ground-based directed energy systems; thus, deploying a directed energy system above Earth's atmosphere eliminates such disturbances, as the interplanetary medium is not substantial enough to significantly affect the coherent beam. DE-STAR is discussed extensively in other papers Kosmo et al, 2015;Lubin et al, 2014). The broader DE-STAR system is not discussed in depth in this paper, which will focus on DE-STARLITE.…”
Section: De-star and De-starlitementioning
confidence: 99%
“…Smaller arrays would be useful for missions that deploy to an area near the asteroid, deemed DE-STARLITE. 3,4 An operational DE-STAR or DE-STARLITE would be capable of serving diverse scientific objectives, including spacecraft propulsion 5 , active illumination for asteroid search and orbit refinement 6 , stand-off composition analysis 7 , orbital debris removal and more; multiple uses of the DE-STAR system are depicted in Fig. 1.…”
Section: De-star System Conceptmentioning
confidence: 99%