Browsing by Subject "single turn coil"
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Item Compulsator--A High Power Compensated Pulsed Alternator(1978-12) Weldon, W.F.; Driga, M.D; Bird, W.L; Tolk, K.M; Woodson, H.H; Rylander, H.G.Item Electromechanical Analysis of a Prototype 20 Tesla, Single Turn Toroidal Field Coil for Ignitex(1989-10) Hsieh, K. T.; Driga, M. D; Weldon, W. F; Werst, M. D.The fusion ignition experiment (IGNITEX) device is a single turn coil tokamak designed to produce and control an ignited plasma using ohmic heating alone. The proposed high strength toroidal field (TF) magnet operates at a magnetic field onaxis of 20 T, using homopolar generators (HPGs). In this paper, the electromechanical analysis of a scaled down prototype (0.06 scale in linear dimensions) of the IGNITEX TF' magnet is presented. The objective of the Ignition Technology Demonstration (ITD) program is to design, build, and test the operation of a single turn, 20 T, TF coil, powered by an existing HPG power supply system. Unlike conventional TF coils that use multiple turns of the conductor, the single turn coil eliminates the need for tum-to-turn insulation; therefore, better utilizing the available area for stress and thermal management. Precooling of' the coil to liquid-nitrogen temperature permits the magnet to operate in a wider temperature regime without exceeding material properties. Scaling relationships presented in this paper show that temperatures and stresses of a scaled-down coil and their relative distribution will approximate predicted levels of the full-scale IGNITEX device. A finite element program (TEXCOR) which solves a set of coupled electrical circuit, magnetic diffusion, and thermal diffusion equations with temperature dependent properties was developed. TEXCOR provides temperatures and magnetic body force densities for stress analysis of the magnet structure. The effect of flatness tolerance stackups in the TF coil assembly is discussed and methods to characterize and minimize the negative effect of nonideal conditions are given. Generator fault scenarios are also addressed. The analysis results presented in this paper show the feasibility of a single turn, 20 T, TF magnet powered by HPGs. This work is sponsored by the Texas Advanced Technology Program and the Texas Atomic Energy Research Foundation.Item Fusion Ignition Experiment(1986-10) Carrera, R.; Montalvo, E; Weldon, W. F; Woodson, H. H; Gully, J. H; Walls, W. A; Driga, M. D; Wu, A. Y; Hsieh, K. T.Item Fusion Ignition Experiment (IGNITEX)(1987-04) Carrera, R.; Driga, M. D; Gully, J. H; Hsieh, K. T; Montalvo, E; Ordonez, C; Walls, W. A; Weldon, W. F; Woodson, H. H; Wu, A. Y; Rosenbluth, M. N.Item Fusion Ignition Experiment (IGNITEX)(1987-10) Carrera, R.; Driga, M. D; Gully, J. H; Hsieh, K. T; Montalvo, E; Ordonez, C; Rosenbluth, M. N; Walls, W. A; Weldon, W. F; Woodson, H. H.Item Fusion Testing Device(1988-04) Carrera, R.; Driga, M. D; Gully, J. H; Hsieh, K. T; Montalvo, E; Ordonez, C; Rosenbluth, M; Walls, W. A; Weldon, W. F; Woodson, H. H.A recently proposed fusion testing device called IGNITEX is described in this paper. The original idea was recently proposed by M.N. Rosenbluth, W.A. Weldon, and H.H. Woodson. The bases for the concept are B. Coppi's ideas for a compact thermonuclear experiment and technological progress in high-current pulsed-power systems. The concept utilizes a single-turn-coil tokamak to produce a 20 Tesla magnetic field and induce plasma currents in excess of 12 Megamperes which beat the plasma ohmically to thermonuclear temperatures. The IGNITEX experiment can produce a self-sustained fusion reaction and a stable ignited phase of the plasma discharge. Low-cost unconventional fusion technologies based on single-turn coils and homopolar generators will be employed. Low-voltage operation will minimize problems of insulation degradation and increase the strength of the magnet system. The neutron wall load during ignition will be high enough to be relevant to the design of future fusion systems. Machine activation problems will be addressed with a close shielding of the device. Diagnostic equipment will be located outside of the primary shielding, in a large experimental hall. A simple tritium system will provide the fuel to the device. Remote maintenance and repair of in-vessel components will be utilized. The compactness, the simplicity of design and the unconventional magnet and power supply technologies of IGNITEX make the basic cost or construction of the experiment relatively low.Item Monolithic Coil Tokamak(1985-04) Weldon, W.F.; Driga, M.D; Woodson, H.H.Item Monolithic Coil Tokamak(1984-10) Weldon, W.F.; Driga, M.D; Woodson, H.H.