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A neutrino super beam from the ESS linac for precision measurements of CP violation in the lepton sector has been designed. The unprecedented power capability of the ESS linac, combined with a dedicated accumulator ring, and a 5 MW target will be used to produce a very intense neutrino beam. The high beam intensity will make measurement of neutrino oscillations at the second maximum possible, thereby reducing the sensitivity of the measurements to systematic errors and matter effects as compared to measurements made at the first oscillation maximum.
ESSnuSB is a collaboration of 15 institutes having received funding from the EC for the last four years. ESSnuSB has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 777419.
This talk will focus on the results of the study on the upgrade feasibility of the ESS linac, the challenges of raising the linac beam power from 5 MW to 10 MW by increasing the duty cycle from 4% to 8%, of the acceleration of proton and H- ions in the same linac, of the effect of the H- losses and how to mitigate them and will also touch on the accumulator and target design.