Date of Award
Master of Science
Department of Engineering Physics
William F. Bailey, PhD
Mitigation approaches for single surface multipactor at dielectric windows are investigated using Particle-In-Cell (PIC) simulations. Initially baseline susceptibility diagrams are constructed analytically and compared with self-consistent, dynamic system trajectories. The power deposited on the surface of a dielectric window in an HPM system is considered using three different methods and the results of PIC simulations. Geometric mitigation is then considered by varying the window orientation with respect to the HPM electric held. Small angular deviations, less than 20 degrees, from the nominal case of normal incidence show dramatic changes in the susceptibility diagram. A materials approach to mitigation is then considered. Titanium Nitride, TiN, coatings applied to the dielectric surface can substantially reduce the secondary emission yield. Representative modifications of the secondary emission yield are simulated and the resulting susceptibility diagrams are discussed.
DTIC Accession Number
Rogers, Neil G., "Electron Multipactor: Theory Review, Comparison and Modeling of Mitigation Techniques in ICEPIC" (2009). Theses and Dissertations. 2445.