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Environmental monitoring report for calendar year 1984

Description: The results of the environmental monitoring program for CY84 for the Princeton Plasma Physics Laboratory (PPPL) are presented and discussed. The Princeton Large Torus (PLT), Princeton Beta Experiment (PBX), and PPPL's largest tokamak, the Tokamak Fusion Test Reactor (TFTR) had a complete year of run time. In addition, the S-1 Spheromak was in operation and the RF Test Facility came on-line. The phased approach of TFTR environmental monitoring continued with the addition of neutron monitors. Dur… more
Date: May 1, 1985
Creator: Stencel, J.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Characteristics of solid-target charge-exchange analyzers for energetic ion diagnostics on tokamaks

Description: Compact electrostatic charge-exchange analyzers have been constructed for installation in areas of high magnetic fields and restricted access near tokamak fusion devices. The analyzers employed carbon stripping foils, and have been calibrated for proton energies between 1 and 70 keV. They have been successfully used to study charge-exchange losses in auxiliary-heated tokamak plasmas.
Date: May 1, 1987
Creator: Beiersdorfer, P.; Roquemore, A.L. & Kaita, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A method for determining poloidal coil configurations for tokamak devices

Description: This paper presents a method for obtaining the locations and currents of the poloidal coil systems for a tokamak, given an desirable magnetohydrodynamic equilibrium for the device. The method involves a simultaneous minimization of the match to the desired poloidal field and the stored energy in the coils, subject to the constraints necessary to achieve decoupling of the equilibrium and inductive-current-drive (ohmic-heating) systems and to achieve a given coupling of the current-drive system w… more
Date: December 1, 1990
Creator: Evans, K., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Particle control studies on Tore Supra

Description: The report consists of viewgraphs. The goal of the particle control program at Tore Supra is to study plasma performance with strong pellet fueling and corresponding particle exhaust in a limiter tokamak. (WRF)
Date: January 1, 1987
Creator: Mioduszewski, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Remote maintenance of Compact Ignition Tokamak ex-vessel systems

Description: The use of deuterium-tritium (D-T) fuel in the Compact Ignition Tokamak (CIT) will require applying remote handling technology for ex-vessel maintenance and replacement of machine components. Highly activated and contaminated components of the fusion device's auxiliary systems, such as diagnostics and RF heating, must be replaced using remotely operated maintenance equipment in the test cell. Throughout the CIT remote maintenance (RM) studies conducted to date, computer modeling has been used e… more
Date: January 1, 1989
Creator: DePew, R.E. & Macdonald, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Superconducting magnetic energy storage

Description: Fusion power production requires energy storage and transfer on short time scales to create confining magnetic fields and for heating plasmas. The theta-pinch Scyllac Fusion Test Reactor (SFTR) requires 480 MJ of energy to drive the 5-T compression field with a 0.7-ms rise time. Tokamak Experimental Power Reactors (EPR) require 1 to 2 GJ of energy with a 1 to 2-s rise time for plasma ohmic heating. The design, development, and testing of four 300-kJ energy storage coils to satisfy the SFTR need… more
Date: January 1, 1976
Creator: Rogers, J. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Helicity content and tokamak applications of helicity

Description: Magnetic helicity is approximately conserved by the turbulence associated with resistive instabilities of plasmas. To generalize the application of the concept of helicity, the helicity content of an arbitrary bounded region of space will be defined. The definition has the virtues that both the helicity content and its time derivative have simple expressions in terms of the poloidal and toroidal magnetic fluxes, the average toroidal loop voltage and the electric potential on the bounding surfac… more
Date: May 1, 1986
Creator: Boozer, A. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Submillimeter wave propagation in tokamak plasmas

Description: The propagation of submillimeter-waves (smm) in tokamak plasmas has been investigated both theoretically and experimentally to ensure successful measurements of electron density and plasma current distributions in tokamak devices. Theoretical analyses have been carried out to study the polarization of the smm waves in TFTR and ISX-B tokamaks. A multichord smm wave interferometer/polarimeter system has been employed to simultaneously measure the line electron density and poloidal field-induced F… more
Date: January 1, 1985
Creator: Ma, C. H.; Hutchinson, D. P.; Staats, P. A.; Vander Sluis, K. L.; Mansfield, D. K.; Park, H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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One- and two-dimensional radiation analysis of the Compact Ignition Tokamak

Description: The Compact Ignition Tokamak (CIT) is being proposed as the next major fusion experiment to follow the operations of the Tokamak Fusion Test Reactor (TFTR). CIT is a compact deuterium-tritium-burning tokamak device that is designed to achieve ignition. The high neutron wall loadings, 7 to 9 MW/m/sup 2/, associated with the operation of this device require that neutronics-related issues be considered in the overall system design. Radiation shielding is required for the protection of both device … more
Date: January 1, 1987
Creator: Selcow, E.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ICRF heating and wave generation in the ATC tokamak. Part 1: wave generation, propagation and absorption

Description: Experimental results and their theoretical interpretations of rf heating experiments in the ion cyclotron range of frequencies are presented. The presentation is in two parts, with this part describing the experimental facilities and characteristics of fast compressional Alfven waves in the tokamak, and a subsequent paper which will deal with the pricipal heating results. It is shown that a simple coupling structure which consists essentially of a semi-circular metal strip and a pair of bumper … more
Date: April 1, 1979
Creator: Takahashi, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ceramics in controlled thermonuclear devices

Description: The possible use of ceramic materials in theta pinch, magnetic mirror, and tokamak devices is outlined. The applications include use as a first wall liner, blanket insulators, and various other electrical insulators. Some problem areas connected with these materials are discussed. (MOW)
Date: January 1, 1976
Creator: Clinard, F. W. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Accelerator technology in tokamaks

Description: This article presents the similarities in the technology required for high energy accelerators and tokamak fusion devices. The tokamak devices and R and D programs described in the text represent only a fraction of the total fusion program. The technological barriers to producing successful, economical tokamak fusion power plants are as many as the plasma physics problems to be overcome. With the present emphasis on energy problems in this country and elsewhere, it is very likely that fusion te… more
Date: January 1, 1977
Creator: Kustom, R. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A bounce-averaged Monte Carlo collision operator and ripple transport in a tokamak

Description: A bounce-averaged Monte Carlo operator is presented that simulates bounce-averaged perturbative Lorentz pitch angle scattering of particles in toroidal plasmas, in particular a tokamak. In conjunction with bounce-averaged expressions for the deterministic motion, this operator allows a quick and inexpensive simulation on time scales long compared to a bounce time. An analytically tractable model of transport due to toroidal magnetic field ripple is described.
Date: September 1, 1986
Creator: Albert, Jay M. & Boozer, Allen H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electromagnetic loads and structural response of the CIT (Compact Ignition Tokamak) vacuum vessel to plasma disruptions

Description: Studies of the electromagnetic loads produced by a variety of plasma disruptions, and the resulting structural effects on the compact Ignition Tokamak (CIT) vacuum vessel (VV), have been performed to help optimize the VV design. A series of stationary and moving plasmas, with disruption rates from 0.7--10.0 MA/ms, have been analyzed using the EMPRES code to compute eddy currents and electromagnetic pressures, and the NASTRAN code to evaluate the structural response of the vacuum vessel. Key fac… more
Date: January 1, 1987
Creator: Salem, S.L.; Listvinsky, G.; Lee, M.Y. & Bailey, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Accelerator-based plasma-wall interaction studies on the TEXTOR tokamak

Description: Deposition probes are commonly used to determine plasma edge characteristics in tokamaks. Such probes are frequently analyzed using accelerator-based techniques and can yield information on impurity fluxes, hydrogen fluxes and energies, and surface erosion rates in the plasma edge. Several types of deposition probes have been employed to investigate the plasma edge region of the TEXTOR tokamak in Juelich, FRG. TEXTOR is a moderate size tokamak (major radius = 1.75 m) that is capable of 2 to 3 s… more
Date: September 1, 1984
Creator: Zuhr, R.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Scattering and Localizability of ECH (Electron-Cyclotron Heating) Power in CIT (Compact Ignition Tokamak)

Description: The theory of scattering by drift-wave density fluctuations is applied to electron-cyclotron heating (ECH) in the Compact Ignition Tokamak (CIT). It is found for CIT that the scattering angles are small and have a Gaussian distribution. An analytic result is given for the average number of scattering events suffered by a ray during propagation through the turbulence layer; this average number is 1.3 for the turbulence level expected in CIT. Localizability of ECH power in CIT is also studied for… more
Date: January 1, 1990
Creator: Smith, G. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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An interim report on the materials and selection criteria analysis for the Compact Ignition Tokamak toroidal field coil turn-to-turn insulation system

Description: This document contains photographs showing the results of laboratory testing of the combinations of epoxy resins, hardeners, and cures undertaken as part of the Compact Ignition Tokamak Insulation Screening Program. Cryogenic shock and soak to equilibrium proved to be the most demanding condition for these materials. The degree of damage to the basic materials when a poor candidate is selected is shown to be quite dramatic. 34 figs.
Date: January 1, 1990
Creator: Campbell, V. W.; Dooley, J. B.; Hubrig, J. G.; Janke, C. J.; McManamy, T. J. & Welch, D. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ORNL fusion programs in industry

Description: A brief review of ORNL's research program on the large coil project, EBT, ISX, and the FED is given. Their subcontracting practices are also mentioned. (MOW)
Date: January 1, 1980
Creator: Rosenthal, M.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Parameters of the luminous region surrounding deuterium pellets in the PLT tokamak

Description: The luminous region of the plasma cloud surrounding deuterium pellets injected into a tokamak is studied spectroscopically. At the time of peak luminosity the average electron density is 2.4 x 10/sup 17/ cm/sup -3/ to within 30% and the temperature is at most 2.0 eV. The intensity ratio of the Balmer alpha and beta light from the pellets, the total number of emitted photons, and the apparent size of the radiating region are consistent with local thermodynamic equilibrium at this temperature and… more
Date: August 1, 1985
Creator: McNeill, D. H.; Greene, G. J. & Schuresko, D. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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