Heavy-Ion Linear Induction Accelerators as Drivers for Inertial Fusion Power Plants

A linear induction accelerator that produces a beam of energetic heavy ions (T ∼ 10 GeV, A ∼ 200 amu) is a prime candidate as a driver for an inertial fusion power plant. Some early perceptions were that heavy-ion driven fusion would not be cost-competitive with other power sources because of the high cost of the accelerators. However, improved understanding of the physics of heavy-ion transport and acceleration (supported by experimental results), combined with advances in accelerator technology, have resulted in accelerator design costs ∼50% of previous estimates. As a result, heavy-ion driven fusion power plants are now projected to be cost-competitive with other conceptual fusion power plants. A brief formulation of transport and acceleration physics is presented here, along with a description of the induction Linac cost optimization code LIACEP. Cost trends are presented and discussed, along with specific cost estimates for several accelerator designs matched to specific inertial fusion target yields. Finally, a cost-effective strategy using heavy-ion induction Linacs in a development scenario for inertial fusion is presented.