The particles are steered round the accelerator with magnetic fields from superconducting magnets.
Higher speeds (and thus energies) can be achieved by increasing the circular circuit radius by limiting the force that has to be applied and the energy loss in the acceleration (change of direction around the circle).
Higher speeds (and thus energies) can be achieved by increasing the circular circuit radius by limiting the force that has to be applied and the energy loss in the acceleration (change of direction around the circle).