Page 10 - Schmitz-APS-DPP-2020-talk_5

Density Fluctuations are Reduced Substantially inside Rs
Results are in agreement with gyrokinetic simulations*: ion-scale core modes are stable due to:
- FLR effects (large ion orbits)
- short connection length/favorable grad-B
Shown here are “low-kq” and “high-kq fluctuation levels:
kqrs ~2-4 andkqrs ~20-40
Electron-scale modes (high-kq) peak in the core
kqrs~2-4 kqrs~20-40
APS-DPP 2020 Presenter: Lothar Schmitz
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Typical DBS probing radii