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Nuclear performance calculations for the ELMO Bumpy Torus Reactor (EBTR) reference design

Description: The nuclear performance of the ELMO Bumpy Torus Reactor reference design has been calculated using the one-dimensional discrete ordinates code ANISN and the latest available ENDF/B-IV transport cross-section data and nuclear response functions. The calculated results include estimates of the spatial and integral heating rate with emphasis on the recovery of fusion neutron energy in the blanket assembly and minimization of the energy deposition rates in the cryogenic magnet coil assemblies. The … more
Date: December 1, 1977
Creator: Santoro, R. T. & Barnes, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Practical blanket design for a toroidal fusion reactor

Description: This blanket concept will be examined for use in a tokamak, but the blanket described here is for an Elmo Bumpy Torus Reactor. In this reactor, the plasma region has a diameter of 2.4 meters under the coils, and a diameter of 3.4 meters in the ''bumps'' between coils. For either diameter the segments are divided into twelve buckets in the poloidal plane. There are nine toroidal segments between the center lines of two coils. The blanket is of uniform thickness for all segments, and this dimensi… more
Date: January 1, 1977
Creator: Bettis, E. S.; Barnes, J. M.; Huxford, T. J.; Liu, K. C.; Santoro, R. T. & Watts, H. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Effects of global field errors on ELMO Bumpy Torus

Description: The plasma sensitivity to magnetic field error effects has been tested experimentally using externally introduced global field errors in the ELMO Bumpy Torus (EBT). A critical field (delta B/sub r//B)/sub cr/ approximately 0.6-1 x 10/sup -3/ was observed, below which the plasma is essentially free from convective cells, toroidal currents, and instabilities. The observed critical value is comparable to a neoclassical critical field error (delta B/sub r//B)/sub cr/ approximately equal to rho/R, t… more
Date: October 1, 1977
Creator: Quon, B. H.; Dandl, R. A.; Colestock, P. L. & Ikegami, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design features of the ELMO Bumpy Torus Reactor (EBTR)

Description: The essential features of the EBTR described are: plasma engineering and physics, magnetics, mechanical design and neutronics. A time-dependent D-T plasma model was formulated to simulate the dynamic behavior of the system and to provide a framework for testing physics assumptions and models. The main goal in the magnetics areas was to satisfy the plasma constraints with a coil design which could be built with existing technology. Conceptual design of EBT reactors based on the modular concept (… more
Date: January 1, 1977
Creator: Uckan, N. A.; Bettis, E. S.; Hedrick, C. L.; Santoro, R. T.; Yeh, H. T.; Watts, H. L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ELMO Bumpy Torus (EBT) reactor

Description: The ELMO Bumpy Torus (EBT) concept has many encouraging and attractive features as a fusion reactor system. These include a high beta, magnetohydrodynamically stable equilibrium; absence of parallel currents; a large aspect ratio; the modular nature of individual sectors; no interlinking coils; ease of maintenance; steady-state operation; and economic potential. The first EBT reactor study was initiated in 1976 and provided the required starting point for continued assessment of the validity of… more
Date: January 1, 1977
Creator: Uckan, N. A.; Dandl, R. A.; Hedrick, C. L.; Bettis, E. S.; Lidsky, L. M.; McAlees, D. G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ELMO Bumpy Torus

Description: The present understanding of equilibrium, stability, and transport in EBT suggests a sequence of research and development activities aimed at a full-scale reactor. The EBT program includes an aggressive development effort for high-power millimeter CW microwave sources based on the Cyclotron Resonant Maser principle. The existing physics evidence suggests that the EBT approach can be extended to confine steady-state, high-beta (toroidal) plasmas. If this extension is demonstrated, then EBT offer… more
Date: January 1, 1977
Creator: Dandl, R.A.; Dory, R.A. & Uckan, N.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Economic analysis of EBT reactor

Description: In order to establish the economic potential of the Elmo Bumpy Torus (EBT) reactor, two independent system-costing models have been developed. Both models predict capital costs of approximately $400/kW(th). These relatively low costs reflect the simplicity of the EBTR design. In particular, the modular nature of the individual blanket-shield segments, the low costs ''accelerator style'' containment building, high beta, and steady-state operation lead to relatively low reactor costs. A detailed … more
Date: January 1, 1977
Creator: Woo, J. T.; Uckan, N. A. & Lidsky, L. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Physics and engineering aspects of the EBT reactor

Description: The ELMO Bumpy Torus (EBT) reactor has the advantage of high-..beta.., steady-state operation. The first reactor study based on the EBT confinement concept was initiated in 1976. It provided the required starting point for continued assessment of the validity of the concept. A new design based on the present physics understanding, practical design approaches, and present and near-term technologies has been established. One of the important factors in an EBT reactor is the large aspect ratio (la… more
Date: January 1, 1977
Creator: Uckan, N. A.; Bettis, E. S.; Hedrick, C. L.; Santoro, R. T.; Watts, H. L. & Yeh, H. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Macroscopic stability and. beta. limits in the ELMO Bumpy Torus

Description: Magnetohydrodynamic stability limits are determined for the ELMO Bumpy Torus. The relativistic hot electron annuli are considered to be rigid, modifying the magnetic field but not interacting with the instability. A modified energy principle is used, and the stability problem is reduced to determination of the eigenvalues of an ordinary differential equation along each field line. A threshold hot electron current is required for stability; its value agrees with experimental measurements. The ca… more
Date: December 1, 1977
Creator: Nelson, D. B. & Hedrick, C. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Numerical model for radial transport in the ELMO Bumpy Torus

Description: Neutral and charged particle densities and temperatures are calculated as functions of radius for the toroidal plasma in the ELMO Bumpy Torus (EBT) experiment. Energy dependent ionization and charge-exchange rates, ambipolar diffusion, and self-consistent radial electric field profiles are included. Variation in magnetic field due to finite plasma pressure, effects of energetic electron rings, and transport due to drift waves and magnetic field errors are neglected. Diffusion is assumed to be n… more
Date: November 1, 1977
Creator: Jaeger, E. F. & Hedrick, C. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Observations of low charge state impurities in EBT

Description: Spatially resolved profiles of low charge state carbon and aluminum ion impurity radiation from EBT were obtained in the vacuum ultraviolet. The data shows EBT to be remarkably free from impurities. Loss times in the surface plasma are found to be approximately 300 ..mu..sec. Thus about one fourth of the input power supports the surface plasma. The measurement places an upper limit on the C V density in the core plasma which indicates that the core plasma is shielded from the impurities in the … more
Date: April 1, 1977
Creator: Warden, E. S.; Moos, H. W. & Lazar, N. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Toroidal magnet system conceptual design for the ELMO Bumpy Torus Reactor

Description: The ELMO Bumpy Torus Reactor (EBTR) is a fusion reactor device based on the concept of toroidally linked mirrors. To minimize engineering uncertainties, the EBTR superconducting magnet system is designed so that it could be built with existing or near-term technology. The design uses identical coils in standard modules, thus facilitating commercialization. The reference design uses 48 modules and produces 4000 MW(th).
Date: January 1, 1977
Creator: Luton, J. N. Jr. & Yeh, H. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Plasma simulation and modeling for ELMO bumpy torus reactor

Description: A simple model (time-dependent deuterium-tritium point model) has been formulated to assess the energy balance in an ELMO Bumpy Torus Reactor (EBTR) plasma. The effects of the different scaling assumptions on EBTR performance and operating point have been analyzed. Although in the present EBT device (EBT-I) plasma transport seems to be governed largely by neoclassical processes, hypothesized anomalous transport losses are included in the plasma simulation model in addition to neoclassical and f… more
Date: October 1, 1977
Creator: Uckan, N. A. & Hedrick, C. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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EBT time-dependent point model code: description and user's guide

Description: A D-T time-dependent point model has been developed to assess the energy balance in an EBT reactor plasma. Flexibility is retained in the model to permit more recent data to be incorporated as they become available from the theoretical and experimental studies. This report includes the physics models involved, the program logic, and a description of the variables and routines used. All the files necessary for execution are listed, and the code, including a post-execution plotting routine, is di… more
Date: July 1, 1977
Creator: Roberts, J. F. & Uckan, N. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Simple neoclassical point model for transport and scaling in EBT

Description: A simple neoclassical point model is presented for the ELMO Bumpy Torus experiment. Solutions for steady state are derived. Comparison with experimental observations is made and reasonable agreement is obtained.
Date: April 1, 1977
Creator: Hedrick, C. L.; Jaeger, E. F.; Spong, D. A.; Guest, G. E.; Krall, N. A.; McBride, J. B. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Extreme ultraviolet and soft x-ray diagnostics of high-temperature plasmas. Annual progress report, June 1, 1976--May 31, 1977

Description: The results of the research program at this laboratory from mid February 1976 until January 31, 1977, are described. The four major research areas of the program: diagnostic studies of magnetically confined high temperature plasmas, supporting laboratory studies, theoretical studies of highly ionized atoms, and instrument development are discussed. Spatially resolved ultraviolet measurements on Elmo Bumpy Torus have determined impurity confinement times. The measured oxygen densities and fluxes… more
Date: January 1, 1977
Creator: Moos, H. W.; Armstrong, L. Jr. & Fastie, W. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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