Minimum Size Q=1 and Ignited Spherical Tokamak Devices
Fusion Science and Technology / Volume 26 / Number 3P2 / November 1994 / Pages 1196-1202
Fusion Power Reactor, Economic, and Alternate Concept / Proceedings of the Eleventh Topical Meeting on the Technology of Fusion Energy New Orleans, Louisiana June 19-23, 1994 / dx.doi.org/10.13182/FST94-A40314
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We find minimum sized Spherical Tokamak (ST) configurations capable of Q∼1 (scientific break-even) and ignition. For Q∼1 cases, we normalize our models to the JET device. We find comparable plasma power balance performance in an ST configuration of major radius ∼ 0.7 m, using both global and 3/2 D plasma transport modeling. For ignited plasma, we first normalize the plasma modeling to the ITER device. We find similar ignited plasma performance capabilities in an ST configuration of major radius 1.2 m. These are much smaller size plasmas than the standard tokamak counterparts, indicating a potentially easier path towards commercial applications. Also, we find that the quantity IA is not a good figure-of-merit for comparing performance of widely different tokamak configurations.
