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Nanoengineered thrusters for the next giant leap in space exploration

  • Engineered Nanomaterials in Aerospace
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Abstract

The physics underlying operation of cold (room-temperature) ionic-liquid emitter sources for use in propulsion shows that such thrusters are advantaged relative to all other “rockets” because of the direct scaling of power with emitter array density. Nanomaterials and their integration through nano- and microfabrication can propel these charged-particle sources to the forefront and open up new applications including mass-efficient in-orbit satellite propulsion and high-thrust-density deep-space exploration. Analyses of electrostatic, fluid-dynamic, and electrochemical limits all suggest that arrays of such ionic-liquid thrusters can reach thrust densities beyond most in-space propulsion concepts, with a limit on nanoporous thruster packing density of ∼1 μm due to ionic-liquid viscous flow and electrochemistry. Nanoengineered materials and manufacturing schemes are suggested for the implementation of microfabricated and nanostructured thruster arrays.

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Acknowledgments

B.L.W. acknowledges support from AFOSR under Grant FA9550-11-1-0192 and NSF under Grant CMMI-1130437. P.C.L. acknowledges support from NASA through contract No. NNL13AA12C and several DOD agencies.

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Authors and Affiliations

  1. Massachusetts Institute of Technology, USA

    Paulo C. Lozano & Brian L. Wardle

  2. Lockheed Martin Space Systems Company, USA

    Padraig Moloney & Suraj Rawal

Authors
  1. Paulo C. Lozano
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  2. Brian L. Wardle
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  3. Padraig Moloney
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  4. Suraj Rawal
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Lozano, P.C., Wardle, B.L., Moloney, P. et al. Nanoengineered thrusters for the next giant leap in space exploration. MRS Bulletin 40, 842–849 (2015). https://doi.org/10.1557/mrs.2015.226

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  • DOI: https://doi.org/10.1557/mrs.2015.226

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