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Optimization of modular coils for stellarator fields

Description: Introduction of a non-sinusoidal deformation can enhance the efficacy of modular coils for generating magnetic fields with a built-in rotational transform. Techniques are developed that provide an understanding of how specific deformations affect the harmonic content of the magnetic field and thus the properties of the vacuum configuration. This provides an optimization procedure for coil design.
Date: February 1, 1982
Creator: Chu, T. K.; Furth, H. P.; Johnson, J. L.; Ludescher, C. & Weimer, K. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Use of the stellarator expansion to investigate plasma equilibrium in modular stellarators

Description: A numerical code utilizing a large-aspect ratio, small-helical-distortion expansion is developed and used to investigate the effect of plasma currents on stellarator equilibrium. Application to modular stellarator configurations shows that a large rotational transform, and hence large coil deformation, is needed to achieve high-beta equilibria.
Date: November 1, 1982
Creator: Anania, G.; Johnson, J. L. & Weimer, K. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modular coils: a promising toroidal-reactor-coil system

Description: The concept of modular coils originated from a need to find reactor-relevant stellarator windings, but its usefulness can be extended to provide an externally applied, additional rotational transform in tokamaks. Considerations of (1) basic principles of modular coils, (2) types of coils, (3) types of configurations (general, helically symmetric, helically asymmetric, with magnetic well, with magnetic hill), (4) types of rotational transform profile, and (5) structure and origin of ripples are … more
Date: April 1, 1981
Creator: Chu, T. K.; Furth, H. P.; Johnson, J. L.; Ludescher, C. & Weimer, K. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Computational study of axisymmetric modes in noncircular cross section tokamaks

Description: A major computational program to investigate the MHD equilibrium, stability, and nonlinear evolution properties of realistic tokamak configurations is proceeding. Preliminary application is made to the Princeton PDX device. Both axisymmetric (n = 0) modes and kink (n = 1) modes are found; the growth rates depend sensitively on the configuration. A study of the nonlinear evolution of axisymmetric modes in such a device shows that flux conservation in the vacuum region can limit their growth.
Date: September 1, 1976
Creator: Johnson, J. L.; Chance, M. S.; Greene, J. M.; Grimm, R. C.; Jardin, S. C.; Kerner, W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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