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Performance of trim coils made by a novel method

Description: A precision, automated method of manufacturing trim coils based on printed circuit technology has been developed. Excellent quench performance and increased radiation resistance have been achieved in recently-tested models of sextupole trim coils developed for operation inside 40 mm-aperture SSC Main Collider dipoles. 6 refs., 2 figs.
Date: January 1, 1991
Creator: Wanderer, P.; Anerella, M.; Cottingham, J.; Ganetis, G.; Garber, M.; Ghosh, A. et al.
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Partner: UNT Libraries Government Documents Department
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Liquid helium dump concept for a large scale superconducting magnetic energy storage plant

Description: Superconducting Magnetic Energy Storage (SMES) is a potentially cost effective technology for electric utility load leveling. Design concepts and cost estimates of SMES plants capable of delivering 5000 MWh daily have been previously identified. An important feature of a large commercial plant is a system that will reliably shut down the magnet by thermally dissipating the stored energy in the event of an imminent or actual loss of superconductivity. To prevent damage to the coil during such a … more
Date: January 1, 1985
Creator: Schoenung, S. M.; Loyd, R. J.; Nakamura, T.; Rogers, J. D. & Purcell, J. R.
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Partner: UNT Libraries Government Documents Department
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Superconductor development program at Lawrence Livermore Laboratory

Description: Winding of a Nb--Ti test coil at the Lawrence Livermore Laboratory is nearly complete. The conductor in this coil operates in a maximum field of 7.5 T and provides the 2-T field required by the Mirror Fusion Test Facility. Nb/sub 3/Sn multifilamentary conductors, made using the ''bronze'' technique, appear capable of providing the higher fields needed by commercial reactors.
Date: January 19, 1978
Creator: Cornish, D.N.
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Partner: UNT Libraries Government Documents Department
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Selection of a cryostabilized Nb/sub 3/Sn conductor cooling system for the large coil program

Description: The Large Coil Project (LCP) is a program to design, fabricate and test relatively large superconducting toroidal field coils for tokamak fusion reactor applications. Some basic requirements that affect the conductor design are cryostabilization, 8 tesla peak magnetic field, and a specified maximum refrigeration load. The engineering considerations that led to the selection of a forced flow supercritical helium-cooled cable conductor are described. Comparisons of forced flow supercritical heliu… more
Date: January 1, 1977
Creator: Chi, J. W. H.; Murphy, J. H. & Jones, C. K.
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Partner: UNT Libraries Government Documents Department
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Potential minimum cost of electricity of superconducting coil tokamak power reactors

Description: The potential minimum cost of electricity (COE) for superconducting tokamak power reactors is estimated by increasing the physics (confinement, beta limit, bootstrap current fraction) and technology (neutral beam energy, toroidal field (TF) coil allowable stresses, divertor heat flux, superconducting coil critical field, critical temperature, and quench temperature rise) constraints far beyond those assumed for ITER until the point of diminishing returns is reached. A version of the TETRA syste… more
Date: January 1, 1989
Creator: Reid, R.L. & Peng, Y-K. M.
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Partner: UNT Libraries Government Documents Department
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Superconducting coil fabrication development at Oak Ridge National Laboratory

Description: A large coil winding facility (>2 m OD) is devoted to developing equipment for winding steady-state toroidal field coils having ''D'' or ''oval'' shapes. Some activities for this facility are discussed. Novel techniques have been developed for winding spliceless pancakes that may have immediate applications for pulsed poloidal field coils. The concept is also applicable for many other coils, including room temperature coils and coils with odd shapes. Also, a unique method of winding small toroi… more
Date: January 1, 1977
Creator: Brown, R.L.
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Partner: UNT Libraries Government Documents Department
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Large coil program support structure conceptual design

Description: The purpose of the Large Coil Program (LCP) is to perform tests on both pool boiling and force cooled superconducting toroidal field coils. The tests will attempt to approximate conditions anticipated in an ignition tokamak. The test requirements resulted in a coil support design which accommodates up to six (6) test coils and is mounted to a structure capable of resisting coil interactions. The steps leading to the present LCP coil support structure design, details on selected structural compo… more
Date: January 1, 1977
Creator: Litherland, P.S.
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Partner: UNT Libraries Government Documents Department
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Superconductor design and loss analysis for a 20 MJ induction heating coil

Description: The design of a 50 k Ampere conductor for use in a 20 MJ Induction Heating Coil is described. The conductor is a wide flat cable of 36 subcables, each of which contains six NbTi strands around a stainless steel core strand. The 2.04 mm (0.080'') diameter monolithic strands allow bubble clearing for cryostable operation at a pool boiling heat transfer from the unoccluded strand surface of 0.26 Watts/cm/sup 2/. A thin, tough polyester amide-imide (Westinghouse Omega) insulation provides a rugged … more
Date: January 1, 1980
Creator: Walker, M. S.; Declercq, J. G. & Zeitlin, B. A.
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Partner: UNT Libraries Government Documents Department
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Structural analysis of the large coil segment test

Description: In the analysis of the LCS, it has been demonstrated that it is possible to design complex structures utilizing existing hardware in a highly reliable and efficient manner. It has also been shown that GIFTS is very useful for aiding in the design and analysis of these complex structures. GIFTS' element generation and graphics display capabilities allow for on-line structural analysis to be performed and permit the incorporation and analysis of major design changes in short periods of time. This… more
Date: January 1, 1977
Creator: Cain, W. D.; Gray, W. H.; Hendrich, W. R.; Nelson, B. E. & Stoddart, W. C. T.
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Partner: UNT Libraries Government Documents Department
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One-Phase Dual Converter for Two Quadrant Power Control of Superconducting Magnets

Description: This paper presents the results of theoretical and experimental development of a new dc-ac-dc converter for superconducting magnet power supplies. The basic operating principles of the circuit are described followed by a theoretical treatment of the dynamics and control of the system. The successful results of the first experimental operation and control of such a circuit are presented and discussed.
Date: January 1, 1985
Creator: Ehsani, M.; Kustom, R.I. & Boom, R.W.
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Partner: UNT Libraries Government Documents Department
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Magnetic energy storage

Description: The fusion program embraces low loss superconductor strand development with integration into cables capable of carrying 50 kA in pulsed mode at high fields. This evolvement has been paralleled with pulsed energy storage coil development and testing from tens of kJ at low fields to a 20 MJ prototype tokamak induction coil at 7.5 T. Energy transfer times have ranged from 0.7 ms to several seconds. Electric utility magnetic storage for prospective application is for diurnal load leveling with mass… more
Date: January 1, 1980
Creator: Rogers, J. D.
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Partner: UNT Libraries Government Documents Department
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a-c losses of 19-strand subcables for the ANL 3. 3-MJ coil

Description: From the time constant and the hysteresis loss measurements of the subcables, it is estimated that approximately 60% of the ac losses of the ANL 3.3 MJ coil at 6 T/s of the central field are due to the losses within the 19-strand subcable itself. The remaining 40% of the losses seem to come mainly from the coupling among the weakly insulated 19-strand subcables in the final cable. The outer sheath copper wires of the subcable improve the stability of the subcable, especially when it is soldered… more
Date: January 1, 1983
Creator: Kim, S. H.; Dawson, J. W.; McGhee, D. G. & Shen, S. S.
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Partner: UNT Libraries Government Documents Department
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Manufacturing aspects of toroidal field magnets for tokamak power reactors

Description: The manufacturing aspects of two different toroidal field (TF) coils are discussed briefly. The first of these is the Tokamak Fusion Test Reactor (TFTR) TF coil, which is presently in the design phase at the Princeton Plasma Physics Laboratory. The second coil configuration reflects a reference design for a large experimental power reactor (EPR) which originated at the Oak Ridge National Laboratory. This configuration was used by the Grumman Aerospace Corporation of Bethpage, N.Y. as the basis … more
Date: January 1, 1977
Creator: Smith, G.E.
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Partner: UNT Libraries Government Documents Department
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Experimental results on a low-temperature magnetic refrigerator

Description: A Carnot-cycle magnetic refrigerator has been designed, built, and tested in the temperature range of approx.4 K to approx.15 K. Gadolinium gallium garnet in the rim of a wheel is the refrigerant. The wheel rim rotates through a gap between two superconducting Helmholtz coils that produce a magnetic field of up to 6 T. Helium gas is used as the heat-transfer fluid in the hot and cold regions of the wheel. The refrigerator performance has been measured in an open-cycle flow system because no sui… more
Date: January 1, 1985
Creator: Barclay, J. A.; Stewart, W. F.; Overton, W. C.; Candler, R. J. & Harkleroad, O. D.
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Partner: UNT Libraries Government Documents Department
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Development of large superconducting magnets for fusion reactors

Description: Superconducting magnets for fusion power reactors are discussed. The Large Coil Program for developing superconducting toroidal field coils for tokamak reactor is described briefly. The Large Coil Test Facility at Oak Ridge is mentioned. (MHR)
Date: January 1, 1977
Creator: Luton, J.N.; Haubenreich, P.N. & Lubell, M.S.
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Partner: UNT Libraries Government Documents Department
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Limits on the field of ohmic heating solenoids, applied to a tokamak TNS. [NbTi]

Description: If the ohmic heating solenoid for the TNS or other large tokamak is an ungraded cryostable superconducting solenoid, with NbTi at 4.2 K as the superconductor, then the smallest outer diameter is not achieved at the highest attainable field. There is a lower optimum field which minimizes the outer diameter for a given volt-second requirement. At higher fields the mean diameter decreases; but the high fields require more superconductor, more copper stabilizer, more stainless steel for support, an… more
Date: January 1, 1977
Creator: Turner, L. R.
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Partner: UNT Libraries Government Documents Department
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Fusion core start-up, ignition and burn simulations of reversed-field pinch (RFP) reactors

Description: A transient reactor simulation model is developed to investigate and simulate the start-up, ignition and burn of a reversed-field pinch reactor. The simulation is based upon a spatially averaged plasma balance model with field profiles obtained from MHD quasi-equilibrium analysis. Alpha particle heating is estimated from Fokker-Planck calculations. The instantaneous plasma current is derived from a self-consistent circuit analysis for plasma/coil/eddy current interactions. The simulation code i… more
Date: January 1, 1988
Creator: Chu, Yuh-Yi
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Measurements of electromagnetic properties of LCT (Large Coil Task) coils in IFSMTF (International Fusion Superconducting Magnet Test Facility)

Description: Participants in the international Large Coil Task (LCT) have designed, built, and tested six different toroidal field coils. Each coil has a 2.5- by 3.5-m, D-shaped bore and a current between 10 and 18 kA and is designed to demonstrate stable operation at 8 T, with a superimposed averaged pulsed field of 0.14 T in 1.0 s and simulated nuclear heating. Testing of the full six-coil toroidal array began early in 1986 and was successfully completed on September 3, 1987, in the International Fusion S… more
Date: January 1, 1987
Creator: Shen, S. S.; Baylor, L. R.; Dresner, L.; Fehling, D. T.; Lubell, M. S.; Lue, J. W. et al.
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Partner: UNT Libraries Government Documents Department
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Superconducting magnetic energy storage scaled prototype for the Los Alamos utility

Description: A complete analysis of the combined Department of Energy (DOE) - Los Alamos National Laboratory, Los Alamos County electric utility was performed to determine the differential cost saving for diurnal load leveling by displacing one of several energy sources with energy stored from the Western Area Power Administration in a superconducting magnetic energy storage (SMES) unit. The base case for the model for comparison is the best concept considered to date - the planned DOE/County power pool com… more
Date: January 1, 1985
Creator: Rogers, J. D. & Kiburz, M. E.
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Partner: UNT Libraries Government Documents Department
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beta. -decay asymmetry of the free neutron

Description: The ..beta..-decay of polarized neutrons has been studied with the new superconducting spectrometer PERKEO at the ILL. The energy dependence of the ..beta..-decay asymmetry has been measured for the first time. From the measured ..beta..-asymmetry parameter we obtain a new value for the ratio of weak coupling constants g/sub A//g/sub V/. 11 references.
Date: January 1, 1983
Creator: Bopp, P.; Dubbers, D.; Klemt, E.; Last, J.; Schuetze, H.; Weibler, W. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of switching surges generated by current interruption in an energy-storage coil

Description: The paper presents an analysis of the transient voltages which are generated when the current in a large magnetic energy storage coil is interrupted by a dc vacuum circuit breaker. The effect of the various parameters in the circuit on the transient voltage is discussed. The self inductance of the dump resistor must be minimized to control the generated transient. Contrary to general belief, a capacitor across the coil is not an effective surge suppressor. In fact, the capacitor may excite osci… more
Date: January 1, 1981
Creator: Chowdhuri, P.
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Partner: UNT Libraries Government Documents Department
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Coil and iron design for SSC 50 mm magnet

Description: In this paper we present the design of the two dimensional coil and iron cross section, referred to as DSX201/W6733, for the 50 mm aperture dipole magnet being built at the Brookhaven National Laboratory for the Superconducting Super Collider (SSC). The computed values of the allowed field harmonics as a function of current, the quench performance predictions, the stored energy calculations, the effect of random errors on the coil placement and the Lorentz forces on the coil will be presented. … more
Date: January 1, 1990
Creator: Gupta, R. C.; Kahn, S. A. & Morgan, G. H.
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Partner: UNT Libraries Government Documents Department
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Conceptual design of a 20-MJ superconducting forced cooled ohmic-heating coil

Description: Conceptual design of a 20 MJ superconducting coil is described which was developed to demonstrate the feasibility of an ohmic-heating system. The superconductor material was Nb/sub 3/Sn for a 9 tesla maximum field. Cabled and braided conductors were investigated and the braided conductors were identified as the best alternates due to their high operating current densities and because of its porosity. The coil was designed to be cryostable for bipolar operation from +9 tesla to -9 tesla maximum … more
Date: January 1, 1978
Creator: Singh, S. K.; Murphy, J. H.; Janocko, M. A.; Haller, H. E.; Litz, D. C.; Eckels, P. W. et al.
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Partner: UNT Libraries Government Documents Department
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