Speaker
Description
A Fixed Field Alternating gradient (FFA) accelerator is an option as a proton driver for the next generation spallation neutron source (ISIS-II) in the UK. To demonstrate FFA suitability for high intensity operation, a prototype 3-12 MeV proton ring is proposed at RAL using as injector the ISIS Front End Test Stand (FETS). The lattice of this ring, called FETS-FFA, is more similar to a synchrotron than a cyclotron since it uses FD spiral focusing unit and has a super-period structure to accommodate long straight sections for injection and extraction. Beam stacking is a key technique to increase the peak intensity in an FFA. The design and experimental validation will be shown. The main lattice magnet is the crucial component of an FFA, with necessary operational flexibility of the working point as a function of beam intensity. A wide range of diagnostics were investigated to measure the beam parameters. This talk will review key results of the 2025 Conceptual Design Report (CDR), as well as other aspects of the FETS-FFA project.
