Conceptual design of the feeders for the superconducting coils for the EU DEMO and DTT machines

Activity performed by Laura Savoldi, for the EU-DEMO in the framework of the EUROfusion Work Package "Magnets", in tight collaboration with the Swiss Plasma Center, and for the DTT in collaboration with ENEA.

Objective of the activity: Development a comprehensive pre-conceptual design for the feeders for the Central Solenoid Modules, Poloidal Field Coils and Toroidal Field Coils of the EU DEMO and DTT machines.

Framework of the activity:

We address the preliminary (pre-conceptual) design of the feeders, considering the main functions they should carry out, and namely:

to connect the magnets to their power supply.
to convey the cryogenic fluid to the magnet system.
to house the instrumentation channels needed to operate and monitor the functioning of the coil system.
to provide an adequate interface to the cryostat.
to provide an adequate interface to the cryoplant.
to provide an adequate interface to the power supply.
to provide an adequate interface to the vacuum.
to provide an adequate interface to the control system.
to provide grounding (through the feeder containment duct and the cryostat) to the magnet casing.

Figure 1. Proposed feeder functional diagram, with main interfaces. The function of providing grounding to the coil casing is not represented.