🧲 Accelerator Dipole Magnet: Beam Rigidity, Bend Radius, Sagitta and Field Energy (2D top view)

Top view of a particle beam crossing a superconducting accelerator dipole, with the ring arc made of identical magnets. Set field, beam momentum, magnet length and magnet count, and watch bend radius, angle, sagitta, field energy and whether the ring closes. Relations follow the 3D page, with four in-page numerical checks including a Lorentz-force integration.