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Physical adsorption: rare gas atoms on solid surfaces. Progress report, June 1, 1980-May 31, 1981

Description: This project has entailed investigation of three areas during the current term: physical adsorption, photostimulated field emission (PSE), and phonon reflection at interfaces. The principal effort has been directed toward understanding interactions associated with physical adsorption and the associated properties of a film. The specific topics pursued include the detailed form of the long range interaction, the configuration space wave function, and the interaction between adatoms. Experimental… more
Date: February 1, 1981
Creator: Cole, M.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fabrication of the helical field coil components for the advanced toroidal facility

Description: The fabrication techniques used to manufacture the major components of the helical field (HF) coil segments for the Advanced Toroidal Facility (ATF) are described. The major components of an HF coil segment are 14 water-cooled, copper conductors and a T-shaped stainless steel support member (or ''tee''). Twenty-four of these segments were used in the fabrication of two coils for the ATF experiment. The helical shape, accurate position requirements, large size, and potential for high cost requir… more
Date: January 1, 1987
Creator: Cole, M. J.; Whitson, J. C. & Banks, B. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Internal Technical Report, Software Requirements and Design Guide for the 5MW(e) Raft River Pilot Plant

Description: The 5MW(e) electrical generating plant is a demonstrational unit intended to provide engineering data basic to improvement of geothermal-electric technology. It is anticipated that the plant will operate on a production basis after initial testing, and that periodic re-testing will be done to measure the effects of fouling in heat exchanges and aging generally. The initial tests will confirm engineering estimates of performance, and will identify optimum feasible operatinq conditions and maximu… more
Date: May 15, 1980
Creator: Metcalf, D.D. & Cole, M.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Results of Compact Stellarator Engineering Trade Studies

Description: number of technical requirements and performance criteria can drive stellarator costs, e.g., tight tolerances, accurate coil positioning, low aspect ratio (compactness), choice of assembly strategy, metrology, and complexity of the stellarator coil geometry. With the completion of a seven-year design and construction effort of the National Compact Stellarator Experiment (NCSX) it is useful to interject the NCSX experience along with the collective experiences of the NCSX stellarator community t… more
Date: May 27, 2009
Creator: Brown, Tom; Bromberg, L. & Cole, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Initial results from a folded waveguide ICRF antenna development project

Description: A folded waveguide (FWG) ICRF launcher has been built and preliminary high power tests completed. This project is intended to provide a proof-of-principle test, using a high density plasma load, of the high power density capability and other ITER-relevant advanced features of the FWG. The design is a 12 vane, 57 MHz unit with a quarter-wavelength resonator configuration. This FWG has a 0.31 m square cross section that can be installed with either fast wave or ion-Bernstein wave polarization and… more
Date: August 1, 1997
Creator: Bigelow, T. S.; Cole, M. J. & Fadnek, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Helical coil alignment in the advanced toroidal facility

Description: This paper presents a brief overview of the helical coil design concept, detailed descriptions of the method for installation and alignment, and discussions of segment installation and alignment equipment. Alignment is accomplished by optical methods using electronic theodolites connected to a microcomputer to form a coordinate measurement system. The coordinate measurement system is described in detail, along with target selection and fixturing for manipulation of the helical coil segments dur… more
Date: January 1, 1985
Creator: Taylor, D. J.; Cole, M. J.; Johnson, R. L.; Nelson, B. E.; Warwick, J. E. & Whitson, J. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Design Construction and Test Results of a HTS Solenoid For Energy Recovery Linac

Description: An innovative feature of the proposed Energy Recovery Linac (ERL) is the use of a solenoid made with High Temperature Superconductor (HTS) with the Superconducting RF cavity. The use of HTS allows solenoid to be placed in close proximity to the cavity and thus provides early focusing of the electron beam. In addition, cryogenic testing at {approx}77 K is simpler and cheaper than 4 K testing. This paper will present the design, construction and test results of this HTS solenoid. The HTS solenoid… more
Date: March 28, 2011
Creator: Anerella, M.; Ben-Zvi, Ilan; Kayran, D.; McIntyre, G.; Muratore, J.; Plate, S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Corrosion studies of titanium in borated water for TPX

Description: Corrosion testing was performed to demonstrate the compatibility of the titanium vacuum vessel with borated water. Borated water is proposed to fill the annulus of the double wall vacuum vessel to provide effective radiation shielding. Borating the water with 110 grams of boric acid per liter is sufficient to reduce the nuclear heating in the Toroidal Field Coil set and limit the activation of components external to the vacuum vessel. Constant extension rate tensile (CERT) and electrochemical p… more
Date: December 31, 1995
Creator: Wilson, D. F.; Pawel, S. J.; DeVan, J. H.; Cole, M. J. & Nelson, B. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Thermodynamic Implications of Band Structure Effects for Rare Gases on Graphite

Description: Recent analyses of atomic beam scattering data have suggested that an anisotropic He-C pair interaction is appropriate to the problem of He on graphite. This results in considerably more corrugated equipotential surfaces than previously assumed, and correspondingly manifest band structure effects. These have been observed for He/graphite in the specific heat for temperature T > 3/sup 0/K. The implications for other gases and temperatures and for the effective adatom-adatom interaction are discu… more
Date: January 1, 1980
Creator: Carlos, W. E.; Cole, M. W.; Rauber, S.; Vidali, G.; Silva-Moreira, A. F.; Codona, J. L. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design description of the helical field coils for the Advanced Toroidal Facility

Description: The Helical Field (HF) Coils for the Advanced Toroidal Facility will consist of two coils, which wrap around the plasma six times. The major radius of the coils will be 2.1 m with a minor radius of 45.75 cm to the coil current center. The coils will be positioned at assembly to within a 2 mm diameter around the winding law, Theta = 1/6 Phi. The coils will be fabricated as a set of 24 identical segments, 12 upper segments and 12 lower segments. These segments will be joined into continuous coils… more
Date: January 1, 1983
Creator: Cole, M. J.; Thompson, P. B.; Jernigan, T. C.; Nelson, B. E.; Vinyard, L. M.; Johnson, R. L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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RF Design and Operating Performance of the Bnl/Aes 1.3 Ghz Single Cell Superconducting Rf Photocathode Electron Gun.

Description: Over the past several years Advanced Energy Systems and BNL have been collaborating on the development and testing of a fully superconducting photocathode electron gun. Over the past year we have begun to realize significant results which have been published elsewhere [1]. This paper will review the RF design of the gun under test and present results of its performance under various operating conditions. Results for cavity quality factor will be presented for various operating temperatures and … more
Date: May 16, 2005
Creator: Cole, M.; Kneisel, P.; Ben-Zvi, Ilan; Burrill, A.; Hahn, G.; Rao, T. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Conceptual design of the tokamak radiation shielding for the Tokamak Physics Experiment (TPX)

Description: The tokamak radiation shielding includes the neutron and gamma shielding around the torus and penetrations required to (1) limit activation of components outside the shield to levels that permit hands-on maintenance and (2) limit the nuclear heating of the superconducting coils and cold structure. The primary design drivers are space, the 350{degree}C bakeout temperature, and cost; therefore, different shield materials were used for different shield components and locations. The shielding is di… more
Date: November 1, 1993
Creator: Cole, M. J.; Nelson, B. E.; Jones, G. H.; Goranson, P. L.; Gohar, Y. & Liew, S. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Design, analysis, and testing of a high thermal conductivity waveguide window for use in a free-electron laser

Description: Design, analysis and testing of a waveguide window with a goal of propagating greater than 100 kW average power operating at 1500 Mhz has been performed. This is made possible by the favorable material properties of Beryllia (BeO). Brazing the window to a soft copper frame and then brazing the frame to a KOVAR flange provides the vacuum seal. RF analysis combined with thermal/structural analysis shows the benefits of the material. The KOVAR flange with a CTE,coefficient of thermal expansion, th… more
Date: August 1, 1998
Creator: Schultheiss, T.; Christina, V.; Cole, M.; Rathke, J.; Elliott, T.; Nguyen, V. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Diagnostics Plan for the National Compact Stellarator Experiment

Description: The National Compact Stellarator Experiment (NCSX) is a stellarator-tokamak hybrid seeking to combine the good confinement, high beta and moderate aspect ratio of the tokamak with the quasi-steady-state operation and good stability properties of the stellarator. A preliminary list of measurement requirements, intended to satisfy the needs of the phased research plan, provides the basis for a full complement of plasma diagnostics. It is important to consider this full set, even at this early sta… more
Date: July 12, 2002
Creator: Johnson, D.; Brown, T.; Neilson, H.; Schilling, G.; Takahashi, H.; Zarnstorff, M. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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THE ANALYSIS OF THE CROSS TALK IN A RF GUN SUPERCONDUCTING CAVITY.

Description: A project to develop an all Niobium Superconducting RF Gun is underway at Brookhaven National Laboratory in collaboration with Advanced Energy Systems. The geometry of the gun requires that the power input and the pickup probes are on the same side of the cavity, which causes direct coupling between them, or crosstalk. At room temperature, the crosstalk causes serious distortion of the RF response. This paper addresses the phenomenon, the analysis and the simulation results as well as the measu… more
Date: May 12, 2003
Creator: ZHAO,Y. COLE,M. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Interpretation of Wild 2 Dust Fine Structure: Comparison of Stardust Aluminium Foil Craters to the Three-Dimensional Shape of Experimental Impacts by Artificial Aggregate Particles and Meteorite Powders

Description: New experimental results show that Stardust crater morphology is consistent with interpretation of many larger Wild 2 dust grains being aggregates, albeit most of low porosity and therefore relatively high density. The majority of large Stardust grains (i.e. those carrying most of the cometary dust mass) probably had density of 2.4 g cm{sup -3} (similar to soda-lime glass used in earlier calibration experiments) or greater, and porosity of 25% or less, akin to consolidated carbonaceous chondrit… more
Date: December 10, 2009
Creator: Kearsley, A T; Burchell, M J; Price, M C; Graham, G A; Wozniakiewicz, P J; Cole, M J et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Field evaluation of sampling methods for pressurized geothermal liquids, gases, and suspended solids

Description: Many different sampling methods were tested and compared for collecting samples for measurement of brine chemistry, gases, and suspended solids from pressurized geothermal systems. The tests were conducted on the 6-2 wellhead and a test loop at the Department of Energy's Geothermal Test Facility at East Mesa, California. The recommended methods for single-phase liquid or single-phase steam (with gases) are presented, together with detailed procedures. The results of testing methods for sampling… more
Date: January 1, 1980
Creator: Shannon, D. W.; Cole, M. W.; DeMonia, D. D.; Divine, J. R.; Jensen, G. A.; Kindle, C. H. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical Scanning and Transmission Electron Microscopy of Laboratory Impacts on Stardust Aluminium Foils: Interpreting Impact Crater Morphology and the Composition of Impact Residues.

Description: The known encounter velocity (6.1kms{sup -1}) between the Stardust spacecraft and the dust emanating from the nucleus of comet Wild 2 has allowed realistic simulation of dust collection in laboratory experiments designed to validate analytical methods for the interpretation of dust impacts on the aluminium foil components of the Stardust collector. In this report we present information on crater gross morphology, the pre-existing major and trace element composition of the foil, geometrical issu… more
Date: October 19, 2006
Creator: Kearsley, A T; Graham, G A; Burchell, M J; Cole, M J; Dai, Z R; Teslich, N et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A high thermal conductivity waveguide window for use in a free electron laser

Description: Design, analysis, and testing of a waveguide window with a goal of propagating greater than 100 kW average power operating at 1500 Mhz has been performed. This is made possible by the favorable material properties of beryllia (BeO). Brazing the window to a soft copper frame and then brazing the frame to a KOVAR flange provides the vacuum seal. RF analysis combined with thermal/structural analysis shows the benefits of the material. The KOVAR flange with a CTE, coefficient of thermal expansion, … more
Date: April 1, 1999
Creator: Elliott, T.; Nguyen, V.; Phillips, L.; Lab), J. Preble (Jefferson; Schultheiss, T.; Christina, V. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Simplified eight-shot pneumatic pellet injector for plasma fueling applications on the Princeton Beta Experiment (PBX) and on the Advanced Toroidal Facility (ATF)

Description: Plasma fueling via injection of solid hydrogenic pellets has expanded the operating range for tokamaks and stellarators to higher densities than attainable with gas puffing. Pellet injection has also resulted in improved plasma energy confinement in tokamak discharges for which the pellet or pellets penetrate deep into the plasma core. The eight-shot pneumatic pellet injector described herein has been developed for use on the Princeton Beta Experiment (PBX) and on the Advanced Toroidal Facility… more
Date: January 1, 1988
Creator: Schuresko, D. D.; Cole, M. J.; Fisher, P. W.; Qualls, A. L.; Bauer, M. L.; Wysor, R. B. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

NCSX Vacuum Vessel Fabrication

Description: The National Compact Stellarator Experiment (NCSX) is being constructed at the Princeton Plasma Physics Laboratory (PPPL) in conjunction with the Oak Ridge National Laboratory (ORNL). The goal of this experiment is to develop a device which has the steady state properties of a traditional stellarator along with the high performance characteristics of a tokamak. A key element of this device is its highly shaped Inconel 625 vacuum vessel. This paper describes the manufacturing of the vessel. The … more
Date: October 7, 2005
Creator: Viola, M. E.; Brown, T.; Heitzenroeder, P.; Malinowski, F.; Reiersen, W.; Sutton, L. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Diagnostics for the National Compact Stellarator Experiment

Description: The status of planning of the National Compact Stellarator Experiment (NCSX) diagnostics is presented, with the emphasis on resolution of diagnostics access issues and on diagnostics required for the early phases of operation.
Date: September 16, 2003
Creator: Stratton, B. C.; Johnson, D.; Feder, R.; Fredrickson, E.; Neilson, H.; Takahashi, H. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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