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- W76012615 abstract "The authors examined the poloidal field (PF) system, including plasma magnetics, magnet design, and electrical energy conversion systems. An overall PF system tradeoff study was carried out taking into account the reactor design constraints and the plasma requirements. The plasma requirements on PF coil currents and configurations are estimated by MHD equilibrium calculations over the ranges of beta ({bar {beta}}) current and shape of interest, e.g., {bar {beta}} < 10%, Ip {le} 4-5 MA, and D-shape with elongation up to 1.6. These ranges are consistent with the latest results in MHD stability and 1-D transport calculations. Critical physics variations in the study include whether electron preheating is successful and whether the plasma current buildup time can be increased from 1 second to 6 seconds. Important engineering options occur in PF coil configurations, coil conductors, coil-supply connection schemes, and power supply configurations. Important engineering concerns include device assembly/disassembly, machine access, remote maintenance requirements, systems integration and the ability to minimize the effect of major plasma disruptions. More than 60 PF system cases are examined with the help of PF system computer design codes. The resulting cost and technology requirements are compared. The findings include: (1) discovery of ways to preheat themore » plasma electrons so that the plasma permits a buildup time above 6 seconds, substantially reduces cost and technology requirements; (2) a hybrid PF coil system with major, slow, exterior superconducting coils and minor, fast, interior copper coils represents the best compromise between engineering and physics requirements; and (3) Motor-Generator-Flywheel (MGF) sets with 12 pulse thyristor bridges are found to be more economic and technically feasible than homopolar generators, superconducting energy storage coils and DC generators, for all startup cases (1-6 seconds).« less" @default.
- W76012615 created "2016-06-24" @default.
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- W76012615 date "1979-01-01" @default.
- W76012615 modified "2023-09-23" @default.
- W76012615 title "Tokamak reactor poloidal field system study" @default.
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