Mixed-type stellarator coil sets for decreased complexity

Stellarator coil sets are presented which use combinations of different coil types, such as helical and window pane coils, to support the HSX magnetic field. Coil sets of mixed type offer many benefits, from decreased coil complexity to improved access properties of the stellarator. A particular example of helical coils with magnetic dipole coil loops is presented which has great outboard side access properties. To achieve this design, novel improvements of the current potential method were utilized as well as the SIMSOPT suite of codes for space-curve optimization.