Computation of zero. beta. three-dimensional equilibria with magnetic islands

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Description

A Picard iteration scheme has been implemented for the computation of toroidal, fully three-dimensional, zero ..beta.. equilibria with islands and stochastic regions. Representation of the variables in appropriate coordinate systems has been found to be a key to making the scheme work well. In particular, different coordinate systems are used for solving magnetic differential equations and Ampere's law. The current profile is adjusted when islands and stochastic regions appear. An underrelaxation of the current profile modifications is generally needed for stable iteration of the algorithm. Some examples of equilibrium calculations are presented. 16 refs., 6 figs., 1 tab.

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Pages: 27

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Reiman, A.H. & Greenside, H.S. January 1, 1989.

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Description

A Picard iteration scheme has been implemented for the computation of toroidal, fully three-dimensional, zero ..beta.. equilibria with islands and stochastic regions. Representation of the variables in appropriate coordinate systems has been found to be a key to making the scheme work well. In particular, different coordinate systems are used for solving magnetic differential equations and Ampere's law. The current profile is adjusted when islands and stochastic regions appear. An underrelaxation of the current profile modifications is generally needed for stable iteration of the algorithm. Some examples of equilibrium calculations are presented. 16 refs., 6 figs., 1 tab.

Physical Description

Pages: 27

Notes

NTIS, PC A03/MF A01 - OSTI; 1.

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  • Other Information: Portions of this document are illegible in microfiche products

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  • Other: DE89006881
  • Report No.: PPPL-2579
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/6432932 | External Link
  • Office of Scientific & Technical Information Report Number: 6432932
  • Archival Resource Key: ark:/67531/metadc1203760

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  • January 1, 1989

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

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  • Oct. 19, 2018, 9:29 p.m.

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Reiman, A.H. & Greenside, H.S. Computation of zero. beta. three-dimensional equilibria with magnetic islands, report, January 1, 1989; United States. (digital.library.unt.edu/ark:/67531/metadc1203760/: accessed December 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.