The electron machine with many applications or electron model for many applications (EMMA) is a linear non-scaling FFAG (fixed-field alternating-gradient) particle accelerator at Daresbury Laboratory in the UK that can accelerate electrons from 10 to 20 MeV. A FFAG is a type of accelerator in which the magnetic field in the bending magnets is constant during acceleration. This means the particle beam will move radially outwards as its momentum increases. Acceleration was successfully demonstrated in EMMA, paving the way for future non-scaling FFAGs to meet important applications in energy, security and medicine.