Building Block Support Structure For Helias Stellarator Reactors

An engineering design study is being performed on an enhanced version of a "Helical Advanced Stellarator" ( HELlAS) reactor which is based on a fourfold up-scaled W7-X. The coil sizes, their maximal conductor field of 12.3 T, and their operation conditions are similar to those of the ITER TF coils which means that many of the ITER magnet technologies can be applied. The mechanical structure of the first design iteration step has been sub-divided into manageable building block panels for easier manufacture and assembly. The screwed panels between the coils are dismountable which opens up the possibility to separate the torus for maintenance as an alternative to the usually considered exchange of divertor and blanket components through the ports.