Status of the engineering design of the IFMIF-DONES high energy beam transport line and beam dump system

Abstract

IFMIF-DONES plant [1] (International Fusion Materials Irradiation Facility – DEMO

Oriented Neutron Source) is currently being developed under the framework of a work package

of the EUROfusion Consortium. It will be a facility located at the south of Spain in Granada. Its

objective and main goal is the testing and qualification of fusion materials by the generation of

a neutron flux with a broad energy distribution covering the typical neutron spectrum of a (D-T)

fusion reactor. This is achieved by the Li (d,xn) nuclear reactions occurring in a liquid lithium

target where a 40 MeV at 125 mA deuteron beam with a variable beam footprint between 200

mm x 50 mm and 100 mm x 50mm collides. The Accelerator Systems is in charge of providing

such high energy deuterons to produce the required neutron flux. The High Energy Beam

Transport line (HEBT) is the last subsystem of the IFMIF-DONES accelerator, and its main

functions are to guide the deuteron beam towards the liquid lithium target and to shape it with

the required rectangular reference beam footprints. The HEBT system includes a Beam Dump

devoted to stop the beam during commissioning and start-up phases. The present work details

the present status of the HEBT engineering design, including beam dynamics, vacuum

configuration, radioprotection, beam diagnostics devices and remote handling analyses

performed detailing the layout and integration of required components through-out the beamline.