Numerical Simulation, Modeling, and Diagnostics in Plasma Physics.

Plasma, an elusive yet highly energetic medium, presents significant challenges in measurement and analysis. Meticulous modeling is imperative for practical understanding and application due to its inherent complexities. This thesis investigates the dynamics of plasma generation and measurement within an experimental setup featuring electromagnetic cavities. The elusive nature of plasma necessitates accurate modeling for practical insights. This research bridges the gap between theoretical understanding and experimental exploration, aiming to unravel the intricate dynamics of plasma behavior within an electromagnetic cavity setup. Understanding plasma behavior in an AC (alternating current) field is the primary goal of this study, which also highlights the difficulties in preserving plasma stability in the face of power variations and frequency disruptions. The goal is to explore how plasma dynamics are related to the resonance in the cavity. The methodology combines practical experimentation with theoretical modeling. It involves using an antenna to evaluate plasma density while injecting frequencies, as well as employing electrode grids connected to a generator for plasma creation. Investigating different plasma densities and comprehending their relation to input parameters, such as injection time and gas pressure, is feasible through adjustments in experimental inputs. Experimental results, depicting shifts in Gaussian peaks amidst noise, indicate variations in the effect of plasma density on cavity resonance. Different power levels and frequency modifications within the AC field correlate with varying plasma densities, emphasizing the dynamic nature of plasma dynamics. The experimental results are validated by simulations conducted with the Loki program, providing insights into the interaction between plasma density, pressure, and power inside the system. This comprehensive analysis contributes to a deeper understanding of plasma dynamics within electromagnetic cavities, emphasizing the significance of accurate modeling and experimental insights in unraveling the complexities of this energetic medium. It paves the way for advancements in plasma physics research.