Experimental Study on Influence of Near-Earth Asteroid Material Characteristics on Laser Ablation Driving Efficiency

Abstract

Based on the issues closely related to the laser driving effect and the characteristics of asteroid materials, experimental research was conducted on the ablation driving efficiency of pulsed laser on near Earth asteroid materials. Different materials and porosity of asteroid like test samples were selected to measure the impulse coupling law. The experimental results show that under the action of pulsed laser ablation, C-type asteroids have higher impulse coupling efficiency than S-type asteroids; As the porosity of asteroids increases, the efficiency of impulse coupling decreases, and the efficiency of laser ablation driving decreases. In addition, experiments were conducted on the changes in mass of laser ablated asteroid like materials, and the results showed the existence of a laser power density that maximizes the efficiency of asteroid mass ablation. For threat asteroids that require long-term warning time, reducing their mass at the fastest rate while ablating and deflecting their orbits can further improve defense efficiency and achieve defense objectives.

Key words： laser driving; ablation; porosity of asteroids; warning time

References

[1] 龚自正，李明，陈川，等. 小行星监测预警、安全防御和资源利用的前沿科学问题及关键技术[J]. 科学通报，2020，65（5）：346-372.
GONG Z Z，LI M，CHEN C，et al. The frontier science and key technologies of asteroid monitoring and early warning，security defense and resource utilization[J]. Chinese Science Bulletin，2020，65（5）：346-372.
[2] 李毅，陈鸿，兰胜威，等. 一种提升近地小行星防御中拦截效率的方法[J]. 航天器环境工程，2017，34（6）：585-592
LI Y，CHEN H，LAN S W，et al. A method to improve interception efficiency in the defense against near-Earth asteroids[J]. Spacecraft Environment Engineering，2017，34（6）：585-592
[3] NASA. Center for Near Earth Object Studies of NASA，CNEOS Discovery Statistics of Near-Earth Asteroids[EB/OL]. （2021-7-26）[2023-7-6]. https：//cneos.jpl.nasa.gov/stats/.
[4] AHRENS T J，TAKATA T，O’KEEFE J D，et al. Impact of comet Shoemaker-Levy 9 on Jupiter[J]. Geophysical Research Letters，1994，21：1087-1090.
[5] POPOVA O P，JENNISKENS P，EMEL’YANENKO V，et al. Chelyabinsk airburst，damage assessment，meteorite recovery and characterization[J]. Science，2013，342（6162）：1069-1073.
[6] BARBEE B W，WIE B，STEINER M，et al. Conceptual design of a flight validation mission for a hypervelocity asteroid intercept vehicle[J]. Acta Astronautica，2015，106：139-159.
[7] LOMOV I，HERBOLD E B，ANTOUN T H，et al. Influence of mechanical properties relevant to standoff deflection of hazardous asteroids[J]. Procedia Engineering，2013，58：251-259.
[8] CHENG A F，ATCHISON J，KANTSIPER B，et al. Asteroid impact and deflection assessment mission[J]. Acta Astronautica，2015，115：262-269.
[9] WIE B，ZIMMERMAN B，LYZHOFT J，et al. Planetary defense mission concepts for disrupting/pulverizing hazardous asteroids with short warning time[J]. Astrodynamics，2017，1：3-21.
[10] MCINNES C R. Near Earth Object orbit modification using gravitational coupling[J]. Journal of Guidance Control Dynamics，2007，30：870-873.
[11] LU E T，LOVE S G. Gravitational tractor for towing asteroids[J]. Nature，2005，438：177-178.
[12] LUBIN P，HUGHES G B，BIBLE J，et al. Toward directed energy planetary defense[J]. Opt Engineering，2014，53：025103.
[13] Vasile M，Maddock C A. Design of a formation of solar pumped lasers for asteroid deflection[J]. Advances in Space Research，2012，50（7）：891-905.
[14] OLDS J，CHARANIA A C，SCHAFFER M G. Multiple mass drivers as an option for asteroid deflection missions[C]//Proceedings of 2007 Planetary Defense Conference. Washington DC：PDC，2007.
[15] BOMBARDELLI C，URRUTXUA H，MERINO M，et al. The ion beam shepherd：a new concept for asteroid deflection[J]. Acta Astronautica，2013，90：98-102.
[16] GIBBINGS A，VASILE M，WATSON I，et al. Experimental analysis of laser ablated plumes for asteroid deflection and exploitation[J]. Acta Astronautica，2013，90（1）：85-97.
[17] BRASHEARS T，LUBIN P，HUGHES B G，et al. Directed-energy deflection laboratory measurements of common space-based targets[J]. Proceedings of SPIE，2016，9981：1-8.
[18] SLOANE J B ，SEDWICK R J . Direct force measurement of pulsed laser ablation of asteroid simulants[J]. Journal of Propulsion and Power，2020，36（2）：1-9.
[19] 李修乾，陈谷仓. 烧蚀模式激光推进[M]. 北京：国防工业出版社，2012.
LI X Q，CHEN G C. Laser-ablation propulsion[M]. Beijing：National Defense Industrial Press，2012.
[20] 洪延姬，金星. 激光清除空间碎片方法[M]. 北京：国防工业出版社，2013.