Physics Basis for a Spherical Torus Power Plant

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The spherical torus, or low-aspect-ratio tokamak, is considered as the basis for a fusion power plant. A special class of wall-stabilized high-beta high-bootstrap fraction low-aspect-ratio tokamak equilibrium are analyzed with respect to MHD stability, bootstrap current and external current drive, poloidal field system requirements, power and particle exhaust and plasma operating regime. Overall systems optimization leads to a choice of aspect ratio A = 1:6, plasma elongation kappa = 3:4, and triangularity delta = 0:64. The design value for the plasma toroidal beta is 50%, corresponding to beta N = 7:4, which is 10% below the ideal stability limit. The ... continued below

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1.4 Megabytes pages

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Kessel, C.E.; Menard, J.; Jardin, S.C.; Mau, T.K. & al, et November 1, 1999.

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Description

The spherical torus, or low-aspect-ratio tokamak, is considered as the basis for a fusion power plant. A special class of wall-stabilized high-beta high-bootstrap fraction low-aspect-ratio tokamak equilibrium are analyzed with respect to MHD stability, bootstrap current and external current drive, poloidal field system requirements, power and particle exhaust and plasma operating regime. Overall systems optimization leads to a choice of aspect ratio A = 1:6, plasma elongation kappa = 3:4, and triangularity delta = 0:64. The design value for the plasma toroidal beta is 50%, corresponding to beta N = 7:4, which is 10% below the ideal stability limit. The bootstrap fraction of 99% greatly alleviates the current drive requirements, which are met by tangential neutral beam injection. The design is such that 45% of the thermal power is radiated in the plasma by Bremsstrahlung and trace Krypton, with Neon in the scrapeoff layer radiating the remainder.

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1.4 Megabytes pages

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INIS; OSTI as DE00014763

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  • Other Information: PBD: 1 Nov 1999

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  • Report No.: PPPL-3392
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/14763 | External Link
  • Office of Scientific & Technical Information Report Number: 14763
  • Archival Resource Key: ark:/67531/metadc625889

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  • November 1, 1999

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  • June 16, 2015, 7:43 a.m.

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  • April 18, 2016, 1:03 p.m.

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Kessel, C.E.; Menard, J.; Jardin, S.C.; Mau, T.K. & al, et. Physics Basis for a Spherical Torus Power Plant, report, November 1, 1999; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc625889/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.