The Hasegawa-Mima equation is a well-studied equation in Plasma Physics. Due to its simplicity, drift wave dynamics can be studied in an isolated environment. In this talk, some assumptions of the (standard) Hasegawa-Mima equation are loosened, and two modified versions are derived. The first approach does not split quantities like the density into a background and fluctuating term (full-F vs. delta-F), making it much more complicated but also better applicable in the plasma edge region. The second approach introduces finite Larmor (FLR) effects. Those effects are compared with the standard Hasegawa-Mima equation.
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