Evolution of IFMIF-DONES' heart: System overview of the Test Cell

The IFMIF-DONES Facility is built with the purpose of irradiating materials under DEMO Tokamak-like
conditions and is a first-of-a-kind project that is foreseen to be built in Granada, Spain. A systematic top-down
approach is used to design its Systems and to aid the harmonization and interaction between them. One of these
main systems is the Test Systems which serves as the meeting point for other major systems such as the Lithium
System (LS) and Accelerator Systems (AS), while also providing a connection to the Facilities for Complementary
Experiments (FCE) for additional irradiation campaigns to take place. The Test Cell is a confined space for the
experiments to take place, with critical functions for operation and safety. The TC is a subsystem serving as a
convergent space for other systems, therefore the design of the TC has to fulfil the needs and requirements of the
connecting systems also. In this paper, the design evolution of the Test Cell is discussed in detail from the early
concept to the last more mature design, while also describing the connecting systems and the challenges these
provide