Directed energy missions for planetary defense

Abstract Directed energy for planetary defense is now a viable option and is superior in many ways to other proposed technologies, being able to defend the Earth against all known threats. This paper presents basic ideas behind a directed energy planetary defense system that utilizes laser ablation of an asteroid to impart a deflecting force on the target. A conceptual philosophy called DE-STAR, which stands for Directed Energy System for Targeting of Asteroids and exploration, is an orbiting stand-off system, which has been described in other papers. This paper describes a smaller, stand-on system known as DE-STARLITE as a reduced-scale version of DE-STAR. Both share the same basic heritage of a directed energy array that heats the surface of the target to the point of high surface vapor pressure that causes significant mass ejection thus forming an ejection plume of material from the target that acts as a rocket to deflect the object. This is generally classified as laser ablation. DE-STARLITE uses conventional propellant for launch to LEO and then ion engines to propel the spacecraft from LEO to the near-Earth asteroid (NEA). During laser ablation, the asteroid itself provides the propellant source material; thus a very modest spacecraft can deflect an asteroid much larger than would be possible with a system of similar mission mass using ion beam deflection (IBD) or a gravity tractor. DE-STARLITE is capable of deflecting an Apophis-class (325 m diameter) asteroid with a 1- to 15-year targeting time (laser on time) depending on the system design. The mission fits within the rough mission parameters of the Asteroid Redirect Mission (ARM) program in terms of mass and size. DE-STARLITE also has much greater capability for planetary defense than current proposals and is readily scalable to match the threat. It can deflect all known threats with sufficient warning.

[1]  Massimiliano Vasile,et al.  On the deflection of asteroids with mirrors , 2010 .

[2]  Claudio Bombardelli,et al.  Mission analysis for the ion beam deflection of fictitious asteroid 2015 PDC , 2016 .

[3]  Bruce A. Conway Mitigation of Hazardous Comets and Asteroids: Optimal interception and deflection of Earth-approaching asteroids using low-thrust electric propulsion , 2004 .

[4]  Stanley G. Love,et al.  Gravitational tractor for towing asteroids , 2005, Nature.

[5]  Gary B. Hughes,et al.  Simulations of directed energy thrust on rotating asteroids , 2015, SPIE Optical Engineering + Applications.

[6]  M. Vasile,et al.  Experimental analysis of laser ablated plumes for asteroid deflection and exploitation , 2013 .

[7]  D. C. Hyland,et al.  A permanently-acting NEA damage mitigation technique via the Yarkovsky effect , 2010 .

[8]  Gary B. Hughes,et al.  Directed energy planetary defense , 2015 .

[9]  D. Morrison,et al.  Dealing with the Impact Hazard , 2002 .

[10]  Massimiliano Vasile,et al.  Optimal impact strategies for asteroid deflection , 2008, ArXiv.

[11]  Bruce A. Conway,et al.  Near-Optimal Deflection of Earth-Approaching Asteroids , 2001 .

[12]  A. Cornfeld,et al.  Initial results of the monolithically grown six-junction inverted metamorphic multi-junction solar cell , 2013, 2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2.

[13]  Massimiliano Vasile,et al.  A Multi‐criteria Assessment of Deflection Methods for Dangerous NEOs , 2007 .

[14]  Ekkehard Kührt,et al.  Optimal deflection of NEOs en route of collision with the Earth , 2006 .

[15]  M. Merino,et al.  THE ION BEAM SHEPHERD: A NEW CONCEPT FOR ASTEROID DEFLECTION , 2013 .

[16]  Gary B. Hughes,et al.  Orbital simulations on the deflection of Near Earth Objects by directed energy , 2015, SPIE Optical Engineering + Applications.

[17]  Gary B. Hughes,et al.  Orbital Simulations on Deflecting Near-Earth Objects by Directed Energy , 2016, 1601.03690.

[18]  C. R. Phipps,et al.  NEO-LISP: Deflecting near-earth objects using high average power, repetitively pulsed lasers , 1994 .

[19]  H. Melosh,et al.  ASTEROIDS : SHATTERED BUT NOT DISPERSED , 1997 .

[20]  J. C. Lin,et al.  Space solar-power stations, wireless power transmissions, and biological implications , 2002 .

[21]  Colin R. McInnes,et al.  Near Earth Object Orbit Modification Using Gravitational Coupling , 2007 .

[22]  Massimiliano Vasile,et al.  Concepts for near-Earth asteroid deflection using spacecraft with advanced nuclear and solar electric propulsion systems , 2005 .

[23]  Marco Tantardini,et al.  Enhanced Gravity Tractor Technique for Planetary Defense , 2015 .

[24]  Andrea Boattini,et al.  Deflecting NEOs in Route of Collision with the Earth , 2002 .

[25]  Gary B. Hughes,et al.  Directed energy planetary defense , 2013, 2015 IEEE Aerospace Conference.

[26]  S. Chesley,et al.  Asteroid Close Approaches: Analysis and Potential Impact Detection , 2002 .

[27]  A. Harris,et al.  On the shapes and spins of “rubble pile” asteroids , 2009 .

[28]  Massimiliano Vasile,et al.  Semi-Analytical Solution for the Optimal Low-Thrust Deflection of Near-Earth Objects , 2009 .

[29]  James R. Wertz,et al.  Space mission engineering : the new SMAD , 2011 .

[30]  Peter S. Gural,et al.  Chelyabinsk Airburst, Damage Assessment, Meteorite Recovery, and Characterization , 2013, Science.

[31]  Jonathan W. Campbell,et al.  Using Lasers in Space: Laser Orbital Debris Removal and Asteroid Deflection , 2012 .

[32]  Alberto Cellino,et al.  Albedo and size determination of potentially hazardous asteroids: (99942) Apophis , 2007 .

[33]  D. Campbell,et al.  Binary Asteroids in the Near-Earth Object Population , 2002, Science.

[34]  Alan W. Harris,et al.  A Thermal Model for Near-Earth Asteroids , 1998 .

[35]  D. Morrison,et al.  The mitigation, management, and survivability of asteroid/comet impact with Earth , 2000 .

[36]  Gary B. Hughes,et al.  Optical modeling for a laser phased-array directed energy system , 2014, Optics & Photonics - Optical Engineering + Applications.

[37]  Christie Alisa Maddock,et al.  Comparison of Single and Multi-Spacecraft Configurations for NEA Deflection by Solar Sublimation , 2007 .

[38]  Gary B. Hughes,et al.  The 13 th Hypervelocity Impact Symposium Orbital Simulations for Directed Energy Deflection of Near-Earth Asteroids , 2015 .

[39]  Gary B. Hughes,et al.  Directed energy deflection laboratory measurements , 2015, SPIE Optical Engineering + Applications.

[40]  P. Michel,et al.  Spin-up of rubble-pile asteroids: Disruption, satellite formation, and equilibrium shapes , 2012 .

[41]  Massimiliano Vasile,et al.  On testing laser ablation processes for asteroid deflection , 2011 .

[42]  Massimiliano Vasile,et al.  Evidence-based robust design of deflection actions for near Earth objects , 2012, ArXiv.

[43]  Claudio Bombardelli,et al.  Accurate analytical approximation of asteroid deflection with constant tangential thrust , 2012 .

[44]  John C. Mankins,et al.  A fresh look at space solar power: New architectures, concepts and technologies , 1997 .

[45]  Massimiliano Vasile,et al.  Improved laser ablation model for asteroid deflection , 2014 .

[46]  Gary B. Hughes,et al.  Directed energy active illumination for near-Earth object detection , 2014, Optics & Photonics - Optical Engineering + Applications.

[47]  Bong Wie,et al.  Dynamics and Control of Gravity Tractor Spacecraft for Asteroid Deflection , 2008 .

[48]  C. Bombardelli,et al.  Ion Beam Shepherd for Asteroid Deflection , 2011, 1102.1276.

[49]  Jesse D. Koenig,et al.  Impact Deflection of Potentially Hazardous Asteroids Using Current Launch Vehicles , 2007 .

[50]  Colin R. McInnes,et al.  Light-touch2: a laser-based solution for the deflection, manipulation and exploitation of small asteroids , 2013 .

[51]  Michael Mueller,et al.  Surface Properties of Asteroids from Mid-Infrared Observations and Thermophysical Modeling , 2007, 1208.3993.

[52]  Michael J. S. Belton,et al.  Mitigation of Hazardous Comets and Asteroids , 2011 .

[53]  Claude Phipps,et al.  Can Lasers Play a Rôle in Planetary Defense , 2010 .

[54]  Piet Hut,et al.  Threat Mitigation: The Gravity Tractor , 2006 .

[55]  Holger Busse,et al.  External Dacryocystorhinostomy: Indications, Method, Complications and Results , 1997 .

[56]  John R. Brophy,et al.  Near-Earth Asteroid Retrieval Mission (ARM) Study , 2013 .

[57]  Gary B. Hughes,et al.  Toward directed energy planetary defense , 2014 .

[58]  Colin R. McInnes,et al.  Deflection of near-Earth asteroids by kinetic energy impacts from retrograde orbits , 2004 .

[59]  Ralph Kahle,et al.  Mitigation Technologies and their Requirements , 2004 .

[60]  Daniel J. Scheeres,et al.  The Mechanics of Moving Asteroids , 2004 .

[61]  Massimiliano Vasile,et al.  Detumbling large space debris via laser ablation , 2015, 2015 IEEE Aerospace Conference.

[62]  Alan W. Harris,et al.  Size, albedo, and taxonomic type of potential spacecraft target Asteroid (10302) 1989 ML , 2007 .

[63]  Daniel D. Mazanek,et al.  Deflection of Earth-Crossing Asteroids/Comets Using Rendezvous Spacecraft and Laser Ablation , 2005 .