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Density Fluctuations are Reduced Substantially inside Rs
Weak ion-scale core modes are observed in the FRC core: Gyrokinetic Simulations find ion-scale stability* (but weak turbulence spreading from the SOL)**
- 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 modes (high-kq) peak in the core
HTPD Conference 2020 Presenter: Lothar Schmitz
kqrs ~ 2-4 kqrs ~ 20-40
Typical DBS probing radii
*C.K. Lau et al., Phys. Plasmas 24, 082512 (2017)
**C.K. Lau et al., Nucl. Fusion 59, 066018 (2019)
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