Astronautical Engineering Seminar

"Modeling Micro-Physics Effects on Macro-Systems:
Applications in Space Propulsion and Space Environments"Speaker:
Joseph Wang, University of Southern California, Astronautics and Space Technology DivisionRefreshments at 1:45Abstract:
Micro-scale plasma processes often directly determine the macroscopic behavior of space plasma environment and the outcome of spacecraft plasma interactions. Such processes also influence many aspects of electric propulsion system design and operation. Understanding and predicting the effects of micro-physics on macro-systems are often extremely challenging due to the complex nature of the physics and experimental limitations. This talk presents some recent advances in understanding and predicting the effects of micro-scale plasma processes using first-principle based simulation models. Three studies will be discussed. The first concerns ion thruster beam neutralization and propagation. The second concerns charging and charged dust particle interactions on the lunar surface. The third concerns radiation belt remediation using plasma turbulence induced by an artificial plasma cloud. A common theme in all these studies is the development of plasma particle simulation algorithms. Two new particle simulation algorithms, the immersed finite element PIC and the electromagnetic hybrid PIC with finite electron mass, will also be discussed briefly along with the application studies.

Location: Grace Ford Salvatori Hall Of Letters, Arts & Sciences (GFS) - 106

Audiences: Everyone Is Invited

Contact: Dan Erwin