Microwave Electro-Thermal Thruster for Multi-Mode Propulsion System

Physical Sciences Inc., in collaboration with our subsidiary Research Support Instruments, proposes to develop a Microwave Electro-Thermal (MET) propulsion system that can be operated using a variety of working fluids, in particular, fluids that are compatible with a chemical propulsion system and an attitude control system (ACS). Our approach is to develop a high specific-impulse microwave system, a high-thrust chemical system, and a high impulse monopropellant ACS such that when integrated together they form a high performance multi-mode propulsion (MMP) system from which individual propulsion modes can be selected on orbit depending upon mission needs. Thus, our three-mode propulsion system will uniquely provide the flexibility needed to Operationally Responsive Space (ORS) missions envisioned by the Air Force. The candidate working fluids for the MET will be energetic propellants that are also long-term storable and easy to handle. In Phase I we will demonstrate feasibility of the MET with a baseline working fluid as well as two other propellants. In Phase II, we will develop a prototype system that will be tested for propulsive performance and space environmental compatibility.