1. IntroductionOver the past of space exploration, chemical spacecraft propulsion systems have proven to be reliable and satisfactory. However, as our ambitions and curiosity in space reach farther, better performance from these chemical fuels continues to be mandated. Multiple rocket staging, costly and large propellant-to-payload mass ratios, and more complicated orbital dynamics for simple missions are all techniques adopted to achieve that. This was still not enough for many missions of inte...