Design of a Fast Single-turn Extraction for the ESSnuSB Accumulator

In the European Spallation Source (ESS) neutrino Super Beam (ESSnuSB), a very intense neutrino beam will be produced in order to measure with a high precision the CP violating angle at the 2nd oscillation maximum. An accumulator ring is included in the ESSnuSB design that allows converting a series of linac pulses to single intense pulses that subsequently will bombard the neutrino production targets. This report presents the optics system for a one-turn fast extraction ejecting the proton beam from the ESSnuSB accumulator ring into the extraction septum gap and further deflecting it into the ring-to-target beam transport line.