• Coordinator: Piotr Cupial (AGH, Poland)
• Co-coordinator: Eric Baussan (CNRS/IPHC, France)
• Team members:
  • Elian Bouquerel (CNRS, France)
  • Marcos Dracos (CNRS, France)
  • Ilias Efthymiopoulos (CERN, Suisse)
  • Koziol Mateusz (AGH, Poland)
  • Pascal Poussot (CNRS, France)
  • Cedric Schwab (CNRS, France)
  • Nikos Vassilopoulos (IHEP, CN)
  • Jacques Wurtz (CNRS, France)
  • Valeria Zeter (CNRS, France)

The main objective of this WP is the preparation of the CDR chapter for the production of the ESS neutrino Super Beam from the proton beam. As for other work packages, it includes cost and safety issues and will incorporate existing information into the CDR and focus only on the new work that needs to be done. In particular, there is already a high-power neutrino target design in the CDR written by EUROν and currently there is experimental work continuing to demonstrate the feasibility of the required target. The WP will design and demonstrate with simulation studies the feasibility of a magnetic horn for pion collection in a 1.25 MW proton beam and the integration of a target of the preferred technology into the horn. It will also investigate possibilities for the design of an alternative collection device based on a permanent-current superconducting solenoid, which thereby benefits from an absence of electrical current limitations. This would allow direct use of the ESS proton beam, thereby suppressing the need for H^– acceleration and for the accumulator ring. Such a breakthrough would significantly lower the capital cost and minimise the challenge of modifying the ESS linac design. The study will have, as an early priority task, to propose a layout of the underground target station, including the pion decay tunnel, on the ESS site and identify minor modifications that can be made in the civil engineering build-up phase of the ESS site that would minimise the disturbance and cost of the later installation of the target station. In view of the use to be made of the very high flux muons concurrently produced with the neutrinos (as previously mentioned), the possibility to make the design of the target station and of the decay tunnel compatible with this future application should be included in the study. It mainly consists to foresee a removable beam dump at the end of the decay tunnel.