EMMA (Electron Machine of Many Applications) is the world's first non-scaling FFAG (Fixed Field, Alternating Gradient) accelerator and is currently under commissioning at Daresbury Laboratory.
EMMA takes electron bunches from ALICE at 10 MeV and passes them around a ring with a circumference of just 16.6 m consisting of 84 quadrupole magnets that both focus and bend the beam and 19 RF cavities to accelerate the beam to 20 MeV before extraction. This prototype machine is intended as a proof-of-concept for future accelerators which can be used for cancer therapy, as a driver for sub-critical nuclear reactors and to accelerate muons for a neutrino factory. The ASTeC accelerator physics group have been a large contributor to the BASROC / CONFORM consortium in the design of EMMA and to the commissioning of the machine.
The EMMA injection line was commissioned with beam in March 2010, the first beam injected into the EMMA ring and transported to the end of four sectors in June 2010. In August 2010 the complete EMMA ring installation was complete and electrons were transported through multiple turns of the ring - the first for a non-scaling FFAG lattice. By the end of 2011, acceleration was achieved in the "serpentine channel" - thus proving the principle behind this novel type of accelerator.