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Proceedings Paper

Directed energy interstellar propulsion of wafersats
Author(s): Travis Brashears; Philip Lubin; Gary B. Hughes; Kyle McDonough; Sebastian Arias; Alex Lang; Caio Motta; Peter Meinhold; Payton Batliner; Janelle Griswold; Qicheng Zhang; Yusuf Alnawakhtha; Kenyon Prater; Jonathan Madajian; Olivia Sturman; Jana Gergieva; Aidan Gilkes; Bret Silverstein
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Paper Abstract

In the nearly 60 years of spaceflight we have accomplished wonderful feats of exploration and shown the incredible spirit of the human drive to explore and understand our universe. Yet in those 60 years we have barely left our solar system with the Voyager 1 spacecraft launched in 1977 finally leaving the solar system after 37 years of flight at a speed of 17 km/s or less than 0.006% the speed of light. As remarkable as this is, we will never reach even the nearest stars with our current propulsion technology in even 10 millennium. We have to radically rethink our strategy or give up our dreams of reaching the stars, or wait for technology that does not exist. While we all dream of human spaceflight to the stars in a way romanticized in books and movies, it is not within our power to do so, nor it is clear that this is the path we should choose. We posit a technological path forward, that while not simple; it is within our technological reach. We propose a roadmap to a program that will lead to sending relativistic probes to the nearest stars and will open up a vast array of possibilities of flight both within our solar system and far beyond. Spacecraft from gram level complete spacecraft on a wafer (“wafer sats”) that reach more than ¼ c and reach the nearest star in 15 years to spacecraft with masses more than 105 kg (100 tons) that can reach speeds of near 1000 km/s such systems can be propelled to speeds currently unimaginable with our existing propulsion technologies. To do so requires a fundamental change in our thinking of both propulsion and in many cases what a spacecraft is. In addition to larger spacecraft, some capable of transporting humans, we consider functional spacecraft on a wafer, including integrated optical communications, optical systems and sensors combined with directed energy propulsion. Since “at home” the costs can be amortized over a very large number of missions. The human factor of exploring the nearest stars and exo-planets would be a profound voyage for humanity, one whose non-scientific implications would be enormous. It is time to begin this inevitable journey beyond our home.

Paper Details

Date Published: 1 September 2015
PDF: 25 pages
Proc. SPIE 9616, Nanophotonics and Macrophotonics for Space Environments IX, 961609 (1 September 2015); doi: 10.1117/12.2189005
Show Author Affiliations
Travis Brashears, Univ. of California, Santa Barbara (United States)
Philip Lubin, Univ. of California, Santa Barbara (United States)
Gary B. Hughes, California Polytechnic State Univ., San Luis Obispo (United States)
Kyle McDonough, Univ. of California, Santa Barbara (United States)
Sebastian Arias, Univ. of California, Santa Barbara (United States)
Alex Lang, Univ. of California, Santa Barbara (United States)
Caio Motta, Univ. of California, Santa Barbara (United States)
Peter Meinhold, Univ. of California, Santa Barbara (United States)
Payton Batliner, Univ. of California, Santa Barbara (United States)
Janelle Griswold, Univ. of California, Santa Barbara (United States)
Qicheng Zhang, Univ. of California, Santa Barbara (United States)
Yusuf Alnawakhtha, Univ. of California, Santa Barbara (United States)
Kenyon Prater, Univ. of California, Santa Barbara (United States)
Jonathan Madajian, Univ. of California, Santa Barbara (United States)
Olivia Sturman, Univ. of California, Santa Barbara (United States)
Jana Gergieva, Univ. of California, Santa Barbara (United States)
Aidan Gilkes, Univ. of California, Santa Barbara (United States)
Bret Silverstein, Univ. of California, Santa Barbara (United States)


Published in SPIE Proceedings Vol. 9616:
Nanophotonics and Macrophotonics for Space Environments IX
Edward W. Taylor; David A. Cardimona, Editor(s)

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