A comparison of multimegawatt electric propulsion options for Mars missions

Computer Science – Performance

Scientific paper

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Comparison, Manned Mars Missions, Mars (Planet), Nuclear Electric Propulsion, Solar Electric Propulsion, Space Exploration, Aerobraking, Chemical Propulsion, Earth Orbits, Spacecraft Propulsion

Scientific paper

An evaluation of multimegawatt (MMW) nuclear electric propulsion (NEP) and solar electric propulsion (SEP) for a piloted Mars exploration scenario is summarized. The figures of merit used in this study were total initial mass in low Earth orbit (IMLEO) and the trip time. We compared the MMW NEP and SEP systems to an aerobraked chemical (O2/H2) propulsion system. A good performance compromise between a low IMLEO and short trip time can be obtained using MMW NEP systems; they can be both lighter and faster than the baseline chemical system. However, a MMW SEP system does not appear capable of providing as short a trip time as MMW NEP, in part due to the higher specific mass of the overall system and the non-constant power output of a SEP system.

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