TFTR coil case design

The Tokamak fusion test reactor toroidal field coil cases are highly loaded structures designed within severe constraints. Foremost among these are basic machine geometry, material characteristics of both the case and the copper/epoxy matrix it supports, and overall cost. Scoping and parametric studies were performed continuously since conceptual design. The progression of design decisions including coil shape, support locations and their stiffnesses, material selection, and element sizing are described. The significant variables are identified for each of the studies. The current coil case design is presented along with aspects of the design still under consideration. Questions that remain involve the effects of limitations placed upon the coil materials (copper, epoxy) themselves. Resolution of these questions is to be accomplished by development tests of coil elements similar to those in the current design.