Abstract
Physics and systems design analyses are carried out
to estimate the desired fusion core parameters for an ST based
Volume Neutron Source (ST-VNS) that utilizes a single-turn
toroidal field coil (TFC). A design with a major radius R, = 1.07
m is estimated to have large margins in physics, technology, and
engineering for the initial operation at moderate performance
(neutron wall load, W, = 0.5-2.0 MW/mZ). The VNS therefore
begins with technologies already assumed in the ITER EDA, and
the relatively conservative physics to be tested initially by the ST
proof-of-principle experiments presently being built. Given
continued advances in technology via the VNS and in physics via
the ST experiments, the design should permit upgrades to test
components and operation at the level of future Pilot Plant and
Power Plants (W, = 5 MW/mZ). This approach to VNS places
premium on modular components and remote maintenance,
encourages continued innovation and optimization in ST fusion
and plasma science, and enhances the practicality of the ST
pathway to fusion power.