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Exponential Toroidal Wavenumber Spectrum in C-2W SOL; Reduced Low-k Fluctuations in the FRC Core
ñ/n ~ exp (-a kqrs) (SOL) a ~ 0.17-0.2
“Flatter” spectra than in tokamak (due to FLR effect)*
10-2
SOL (r-Rs ~ 5 cm)
r = Rs
Core (r-Rs ~ - 8 cm)
”Inverted” wavenumber spectrum 10-3 in FRC core: due to FLR effect
and short connection length*
Electron modes dominate the FRC core: Dynamics
is different from tokamak
10-4
10-50 20
HTPD Conference 2020 Presenter: Lothar Schmitz
40 60 kθ ρs
80
*C.K. Lau et al., Nucl. Fusion 59, 066018 (2019)
18
ñ/n (arb. units)