Magnetic confinement. A tokamak uses a strong toroidal magnetic field, poloidal field controls and a central solenoid. Helical magnetic field-line geometry helps keep hot, ionized plasma from direct contact with the vacuum-vessel wall.
Textbook large-aspect-ratio approximation: Bφ(R) ≈ μ₀NI / (2πR)
B = μ₀NI / 2πR
Electron cyclotron frequency: fce = eB / (2πmₑ)
Idealized plasma pressure: p = n kB(Te + Ti) = 2n Te(eV)e; β = 2μ₀p/B²; magnetic pressure pB = B²/(2μ₀).
Independent numerical cross-check: an illustrative 1 keV electron's speed v = √(2E/mₑ), gyro-radius rL = mₑv/(eB), and f = v/(2πrL).
Engine—Independent—Difference—
Genuine science: toroidal and poloidal magnetic fields, plasma beta, cyclotron frequency, wall-facing components and divertors. Engineering-inspired: the fictional winding packs, cryostat shape, rack layouts and port placement. Simplified: ideal axisymmetric magnetostatics, uniform temperature/density and visualized trajectories. Speculative: some access modules and service fixtures.
Not a plasma-equilibrium, MHD, radiation-transport, heat-transfer or safety analysis. Animated paths convey qualitative behavior only.
Illustrative design, not affiliated with any real institution or manufacturer.