Design and feasibility of the TJ-II hard core

The TJ-II is a flexible heliac under construction, to be mounted at the Euratom/Ciemat Association Laboratory in Madrid, Spain. The machine can explore different magnetic configurations (mainly with different values of the rotational transform) by means of the adjustment of the currents in the coils. The hard core (HC) is one of the main components of the device and it constitutes what can be called the most critical part of the machine, since its close proximity to the plasma places on it the requirement of strict tolerances. The authors describe the engineering design features of the HC, the main characteristics, and the design details An overview of the manufacturing methods is also presented.<
>