| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Coating and Thin Film Materials for Energy, Aerospace, Environment and Biological Applications
|
| Presentation Title |
Advanced Coatings for Passive Mitigation of Spacecraft Charging |
| Author(s) |
Danny Liu, Joshua Boman, Matthew Lyle, Dan Wang, JR Dennison, Timothy Hall, Maria Inman |
| On-Site Speaker (Planned) |
Danny Liu |
| Abstract Scope |
Spacecraft charging has been recognized as an important consideration for spacecraft design and occurs due to charged particle interactions between space plasmas and the spacecraft. When parts of the spacecraft experience differential charging relative to one another, resulting in a potential which exceeds the breakdown potentials, discharge arcing may occur and irreversibly damage spacecraft components. One solution towards avoiding discharge arcing is to incorporate coatings to facilitate autonomous or passive electron emission. By enabling charge dissipation between the various components at modest potential differences, discharge arcing may be prevented. In this work, a graphene-based composite coating was developed and demonstrated high electron yields over a wide range of incident electron energies. Decoration of the coating with various metals (alkali, alkaline earth, transition) offered significant improvements in the electron yield (290% increase over the undecorated coating) and substantially extended the range (~9 times) of incident electron energies between crossover points. |