Preparation of exploitation of medium-size tokamaks under European roadmap for the realization of fusion energy

To implement the European fusion research programme, outlined in the "Roadmap to the realisation of fusion energy" and pub lished in 2012 [1], a coordinated programme of upgrades to the European Medium - Size Tokamaks (MST) (AUG, MAST - U, TCV) has been identified. A focus is to enable the integrated exploitation of the MST and JET devices, both through the selection of diagnostic s and the staging of the upgrades in time. This paper discussed the scientific case made to identify the upgrades and their implementation on the three MST devices.