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Relations between the major size and cost parameters of tokamaks

Description: A set of preliminary estimates of the effects of toras size on major design and cost parameters was made for a series of tokamak reactors with superconducting coils for the toroidal field. The three sets considered include essentially zero power scientific feasibtlity experiments, low-power reactor systems for plasma physics experiments, and full-scale power reactors. The prime concern is with the cost of the superconducting magnet coils, but allowances for the blanket and magnet shield systems are also included as well as the system for heating the plasma to the ignition temperature. The prime objective was to show trends for major parameters, not absolute values for costs. The results of the study indicate that the cost of a superconducting coil system for the toroidal field increases relatively little with torus diameter for a scientific feasibility experiment, is quite insensitive to torus size for a plasma physics test reactor, and actually falls off with increasing size for a full scale power reactor. These effects stem from the reduction in the magnetic field required associated with an increase in torus size together with the increase in the allowable current density in the superconductor material with a reduction in the design value for the magnetic field. The results indicate further that, for a modest increase in the cost of superconducting magnets for the toroidal field, it should be possible to build a feasibility experiment so that it can be converted readily into a plasma physics test reactor. (auth)
Date: January 1, 1974
Creator: Fraas, A. P.
Partner: UNT Libraries Government Documents Department

Toroidal simulation magnet tests

Description: A number of different schemes for testing superconducting coils in a simulated tokamak environment are analyzed for their merits relative to a set of test criteria. Two of the concepts are examined in more detail: the so-called cluster test scheme, which employs two large background field coils, one on either side of the test coil, and the compact torus, a low-aspect ratio toroidal array of a small number of coils in which all of the coils are essentially test coils. Simulation of the pulsed fields of the tokamak is discussed briefly. (auth)
Date: January 1, 1975
Creator: Walstrom, P.L. & Domm, T.C.
Partner: UNT Libraries Government Documents Department

Transient poloidal field effects in twisted multifilamentary superconductor for toroidal field windings of tokamaks

Description: A circuit model is presented for a twisted filamentary superconductor exposed to a pulsed parallel external field. Experimental results are also reported on the measurements of transient loss voltage and its change due to transport current. The measurements are in reasonable agreement with that predicted by the postulated model. (auth)
Date: January 1, 1975
Creator: Shen, S.S. & Miller, J.R.
Partner: UNT Libraries Government Documents Department

Superconducting OHMIC-heating coils for the Argonne TEPR design study

Description: A system of air-core superconducting ohmic-heating coils was studied for the Argonne TEPR design. The OH coil requirements, the basis for the choice, and a suitable conductor are described. A 3.6 m diameter, 13 m long solenoid plus ten other coils with diameters up to 23 m provide (together with the equilibrium coils) the needed 110 volt-sec flux change while producing little magnetic field at the plasma region or at the toroidal field coils. (auth)
Date: January 1, 1975
Creator: Turner, L.R.; Wang, S.T. & Purcell, J.R.
Partner: UNT Libraries Government Documents Department