Micro Scalable Thrusters for Adaptive Mission Profiles in Space
Published:8/23/2021Description:
The Problem:
State-of-the-art electrospray-based micro-propulsion thrusters for Cubesats are designed around arrays of sharp micro-emitters protruding directly into space. These emitters are responsible for generating the intense electric fields needed to electrospray a propellant and generate thrust. Sharper emitters require lower voltages to operate, which in turn results in less electromagnetic interference induced in nearby mission-critical equipment that can cause data errors, temporary resets, or even failure. But conventional micro-emitters with extremely sharp profiles and low operating voltages are exceedingly hard to fabricate consistently and are extremely fragile, making them especially susceptible to degradation during operation.
The Solution:
Researchers at the University of Tennessee have developed thrusters with micro-emitters embedded within a material. Their electrospray-based micro-propulsion solution for Cubesats completely bypasses the trade-offs between emitter shape, fabrication limits, structural robustness, operating voltage, and service life encountered in other systems. In addition, the emitters stay protected from the harsh conditions of space. These thrusters are micro-scalable and still perform as well as the electrospray thrusters currently proposed for use in Cubesats.
Main characteristics:
- Unique, revolutionary design
- Robust, optimized structures
- Simple, precise fabrication
- Ultrasharp, consistent geometries
Benefits:
- Extension of Cubesat lifespan
- Makes feasible the use of arrays of Cubesats to replace traditional satellites
- The use of Cubesats protects investors from economic disaster in the case of losing a single, large satellite
Inventors:
Dr. Lino Costa received his PhD from The University of Lisbon. His research interests include propulsion, laser materials processing, nanomaterials, and energy storage.
Dr. Trevor Moeller received his PhD from The University of Tennessee in 1998. His research interests include rocket propulsion, electric propulsion devices, high-temperature gases, and electromagnetic acceleration.