Principal mechanism: a strong toroidal field together with controlled poloidal fields is used to confine charged particles on helical magnetic trajectories. An induced plasma current and external shaping fields are essential parts of the tokamak concept.
Textbook magnetic-field estimate: B(R) = B₀R₀/R. The result is evaluated at R = R₀ + a/2. It describes an ideal axisymmetric toroidal field, not a measured field map.
Textbook gyroradius: rL = √(2mDE)/(eB), with E in joules, a singly charged deuteron and a perpendicular kinetic energy assumption.
Textbook magnetic energy density: uB = B²/(2μ₀). Illustrative volume: V ≈ 2π²R₀a²κ, with fixed assumed elongation κ = 1.6.
Independent check: Ieq = 2πR₀B₀/μ₀ and Bcheck = μ₀Ieq/(2πR), evaluated separately from the engine field expression.
Genuine features: vacuum vessel, toroidal and poloidal magnetic coils, central solenoid, plasma-facing components, ports and external infrastructure are meaningful tokamak subsystem types.
Engineering-inspired reconstruction: coil envelopes, field-joint geometry, cryogenic piping, blanket cassettes and service gantries are fictional and are not a buildable engineering design.
Simplified educational representation: the plasma surface and field-line animation illustrate concepts, not validated MHD equilibrium, neutron transport, fusion gain, thermal loads or plasma stability.
Speculative details: decorative reference fiducials, rack displays and some mechanical housing shapes are original exhibit-design inventions.
Number convention: all scene lengths are scaled; adjustable quantities and readings are illustrative textbook inputs/results, not facility specifications.
Illustrative design, not affiliated with any real institution or manufacturer.