CD Tesis
Simulasi Ionisasi Plasma Argon Dalam Kesetimbangan Termodinamika Dengan Persamaan Kontinuitas
SUMMARY
ANSHORI KASRI, NIM. 2110247694, Simulation of Argon Plasma Ionization in Thermodynamic Equilibrium with Continuity Equation, supervised and proctoring by Saktioto and Rakhmawati Farma
The use of plasma in the industrial world is spread across various implementations. The processes that occur in plasma have been observed experimentally in various studies. Local thermodynamic equilibrium is a foundational concept in plasma physics and heat transfer, describing a state where each small region of a system can be treated as if it is in thermodynamic equilibrium, even if the whole system is not. However, achieving accurately perfect thermodynamic equilibrium conditions in real-experiments is often challenging. It often struggles for understanding phenomena like excited states or specific Arrhenius-driven reactions. As a result, the advantages of plasma modeling with simplifications can sometimes overshadow the disadvantages of experiments.
This study simulated the ionization process of Argon plasma using the 4th Order Runge-Kutta numerical method. Argon plasma simulation research by creating four different types of files as a place to store physics units, Argon reactions, Arrhenius reaction rate constant data, and numerical logic available from the MATLAB system.
The simulation, initiated with initial densities before the simulation is run, each of them is electrons 2.6 · 1018 m-3, neutral Argon (Ar) 2.6 · 1018 m-3, positive Argon ions (Ar+) 2.6 · 1018 m-3, and positive diatomic Argon ions (Ar2+) 2.6 · 1018 m-3, successfully obtained reaction rate equilibrium data at the time was 6.18 · 10-4 s (625th of iteration).
The final densities observed were 2.46⋅1018 m-3 for electrons, 2.27⋅1018 m-3 for neutral Argon, 6.4⋅1015 m-3 for Ar+, and 4.34⋅1017 m-3 for Ar2+. These results show the equilibrium reaction rate in Argon plasma which provides information that density of electron and Ar+ species show a decreasing trend while density of Ar and Ar2+ species shows an increasing trend which are the result of ionization and recombination processes in the entire plasma system.
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