The ESS-CONCERT funnel line

The CONCERT concept aims to deliver high power pulsed beams to a various number of applications : matter studies with spallation neutrons, waste transmutation, exotic beam production, irradiation tools... It is one of the extension of the European Spallation Source project (ESS) dedicated to spallation neutrons production for mater studies. Both protons and H- have to be accelerated and guided to each target. Two 50 mA H^- branches are funnelled with one 100 mA H ⁺ branch at around 25 MeV. A low energy H^branch is constituted of one RFQ from around 50 keV to 2 MeV, a chopper line (for ring injection at high energy), an other RFQ to 5 MeV, and a DTL to the funnel line. The low energy H+ is constituted of one RFQ from around 95 keV to 5 MeV and a DTL to the funnel line. The beams are then accelerated through a SDTL, a CCL and a Superconducting cavity Linac (SCL). The goal of this paper is to present the detailed design of the funnel line, including the funnel cavity design and the beam dynamics through the line