Tokamak Bootstrap Current Fraction Calculator
Neoclassical transport & steady-state fusion: Compute the self-generated bootstrap current fraction ($f_{bs} = I_{bs} / I_p$), trapped electron banana fraction ($f_t$), and poloidal beta ($\beta_p$).
Tokamak Pressure & Geometry
Steady-state advanced scenario
Plasma pressure / poloidal B²
Pressure Profile Peaking
Hirshman-Sigmar neoclassical coefficient (typically 0.45–0.65)
Bootstrap Fraction & Non-Inductive Drive
Bootstrap Fraction f_bs:
--
% self-driven current
Bootstrap Current I_bs:
--
MegaAmperes (MA)
External CD Req:
--
MA (NBI / ECCD)
Trapped Fraction f_t:
--
banana orbit ions
Inverse Aspect ε:
--
a / R₀
Steady-State Fusion Power Plant Viability
Operation Mode:
--
Recirculating Power Penalty:
--
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