A tokamak with inclined toroidal field coils

Abstract

Summary form only given, as follows. Physics and engineering principles of a tokamak with vertically inclined toroidal field (TF) coils are considered. This device can be viewed as a hybrid between the tokamak and stellarator configurations. The stellarator-like properties include the existence of vacuum flux surfaces with finite rotational transform. The present report extends the previous more general studies towards recommendations for a specific device of this type with parameters close to that of the Phaedrus-T tokamak. Our analysis includes both the physics and engineering aspects. In the physics part, we analyze various types of TF coils for their effectiveness to generate the stellarator-like properties. The optimization of the configuration with respect to the angle of inclination and number of TF coils, and various poloidal field coil systems is given. The physics part is based on the UBFIELD and other codes. The engineering part includes the analysis of the magnetic forces on various parts of the coils and the possible engineering implementation of the above device. The numerical code EFFI is used for the engineering analysis. The physics and engineering optimization of the configuration is studied to ensure its feasibility for construction.