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in subjects: "Superconducting Devices"

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Mechanical Engineering Department quarterly report, July--September 1977

Separate abstracts were prepared for 3 of the included sections. (MOW)

Date: September 30, 1977

Creator: Stone, R.G. & Bathgate, M.B. (eds.)

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Potential for use of high-temperature superconductors in fusion reactors

The present rate of development of high-temperature superconductors (HTSs) is sufficiently rapid that there may be opportunities for their use in contemporary fusion devices such as the International Thermonuclear Experimental Reactor (ITER). The most likely 1application is for delivering power to the superconducting magnets, especially in substituting for the current leads between the temperatures of 4 K and 77K. A second possible application of HTSs is as a liquid-nitrogen-cooled power bus, c… more

Date: January 1, 1991

Creator: Hull, J.R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Conductor qualification tests for the 30-MJ Bonneville Power Administration SMES coil

The 30-MJ energy storage coil for the Bonneville Power Administration requires a low-loss, cryostable conductor that is able to carry 4.9 kA in a field of 2.8 T and will maintain its properties over 10/sup 8/ partial discharge cycles. The multi-level cable which satisfies these requirements has been extensively tested at various stages in its development and in its final form. Tests have been performed to determine the effect of manufacturing options on ac losses, low temperature electrical res… more

Date: January 1, 1980

Creator: Schermer, R. I.; Boenig, H. J.; Henke, M.; Turner, R. D. & Schramm, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Conceptual design of a superconducting magnet coil for the large coil program. [Flat-wound NbTi coils]

A conceptual design for a toroidal field (TF) coil for a six coil test array has been developed. The electromagnetic, cryogenic, structural, manufacturing, quality assurance and verification testing requirements have been analyzed. The bore is oval shaped and is 2.35 meters horizontally and 3.35 meters vertically. The coil is designed to operate at 8T peak field at rated current of 10450 amperes when the other 5 coils in the toroidal array are at 80% rated current. Using-flat-wound NbTi conduct… more

Date: January 1, 1977

Creator: Quay, R.; Bryant, R. W.; Koenig, R. F.; Ferrante, J. J.; Linkinhoker, C. L.; Donato, J. W. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Construction and testing of the Mirror Fusion Test Facility magnets

This paper describes the construction and testing of the Mirror Fusion Test Facility superconducting magnet set. Construction of the first Yin Yang magnet was started in 1978. And although this particular magnet was later modified, the final construction of these magnets was not completed until 1985. When completed these 42 magnets weighed over 1200 tonnes and had a maximum stored energy of approximately 1200 MJ at full field. Together with power supplies, controls and liquid nitrogen radiation… more

Date: August 1, 1986

Creator: Kozman, T.; Shimer, D.; VanSant, J. & Zbasnik, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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TPC magnet cryogenic system

The Time Projection Chamber (TPC) magnet at LBL and its compensation solenoids are adiabatically stable superconducting solenoid magnets. The cryogenic system developed for the TPC magnet is discussed. This system uses forced two-phase tubular cooling with the two cryogens in the system. The liquid helium and liquid nitrogen are delivered through the cooled load by forced tubular flow. The only reservoirs of liquid cryogen exist in the control dewar (for liquid helium) and the conditioner dewar… more

Date: March 1, 1980

Creator: Green, M.A.; Burns, W.A.; Taylor, J.D. & Van Slyke, H.W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Performance of trim coils made by a novel method

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.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Size effects and interstitial impurities in Nb/sub 3/Zr superconductors. Superconducting solenoids with metal insulation. [Oxygen and carbon]

No Description Available.

Date: September 11, 1962

Creator: Betterton, Jr, J O; Kneip, Jr, G D; Easton, D S & Scarbrough, J O

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Mirror fusion. Quarterly report, April-June 1981

The information in each Quarterly is presented in the same sequence as in the Field Work Package Proposal and Authorization System (WPAS) submissions prepared for the U.S. Department of Energy; the main sections are Applied Plasma Physics, Confinement Systems, Development and Technology, and Mirror Fusion Test Facility (Planning and Projects). On occasion, we shall include information pertaining to the LLNL role as Lead Laboratory for the Open Systems Mirror Fusion Program. Each of these sectio… more

Date: September 11, 1981

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Cryogenic recovery analysis of forced flow supercritical helium cooled superconductors

A coupled heat conduction and fluid flow method of solution was presented for cryogenic stability analysis of cabled composite superconductors of large scale magnetic coils. The coils are cooled by forced flow supercritical helium in parallel flow channels. The coolant flow reduction in one of the channels during the spontaneous recovery transient, after the conductor undergoes a transition from superconducting to resistive, necessitates a parallel channel analysis. A way to simulate the parall… more

Date: August 1, 1977

Creator: Lee, A. Y.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Superconducting final focus for the SLAC Linear Collider

Triplets composed of superconducting quadrupoles have been built and installed as the final focusing element for the high-energy positron and electron beams of the SLAC Linear Collider. Special features include independent alignment to 100-micron tolerance inside a common cryostat; non-magnetic materials to allow operation inside the detector's solenoid field; a continuous-flow helium-only system using 50-meter-long flexible transfer lines; and complete operation of the system before installati… more

Date: May 1, 1992

Creator: Ash, W.W.; Barrera, F.; Burgess, W.; Cook, K.; Cutler, H.; Ferrie, J. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Wiggler, undulator, and free-electron laser-radiation sources development at the National Synchrotron Light Source

An overview is presented of the special radiation sources development at the NSLS for incorporation in a 2.5 GeV X-ray storage ring and a 700 MeV vuv storage ring. This includes a superconducting high field multipole wiggler, lambda/sub c/ = 0.5A; a permanent magnet wiggler, lambda/sub c/ = 2.0A; a maximum photon energy undulator (5 to 7 keV); an undulator for a soft X-ray line or continuum spectrum and a free electron laser source tunable in the 2500 to 4500A region. Source characteristics and… more

Date: January 1, 1982

Creator: Hsieh, H.; Krinsky, S.; Luccio, A.; Pellegrini, C. & van Steenbergen, A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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High-field bipolar loss measurement apparatus

An apparatus was constructed to measure dissipation in superconducting wire in high alternating fields. The apparatus will be used to make measurements on conductors which must operate in fields up to 7.0 T and rates of field change up to 15 T/s. The magnet for this facility is wound of uninsulated, 15 strand Rutherford cable in which the strand is a 0.812 mm diameter, fully mixed matrix, Cu plus CuNi, multifilament NbTi conductor. The coil is wound in a bath cooled configuration with an overal… more

Date: January 1, 1980

Creator: Thullen, P.; Weldon, D. & Wollan, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The laser switched linac and development of a high brilliance electron source

This task originated in 1987 to explore the possibility of accelerating short bursts of electrons by pulsed power. The principal effort of our group was to demonstrate that electrons can be accelerated by picosecond-long electrical pulses which are compressed in a radial transmission line. This goal has new been achieved and our results are presented in this paper. We have achieved a gradient of 45 MV/m across a 250 {mu}m accelerating gap and have accelerated 10{sup 6} electrons in a 1 ps long … more

Date: September 1, 1991

Creator: Melissinos, A.C.; Bamber, C.; Blalock, T.; Fry, A. & Wilson, T.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Test results of BNL built 40-mm aperture, 17-m-long SSC collider dipole magnets

Eleven 17 m long, 40 mm aperture SSC R D superconducting collider dipole magnets, built at BNL, have been extensively tested at BNL and Fermilab during 1990--91. Quench performance of these magnets and details of their mechanical behavior are presented. 7 refs., 5 figs.

Date: June 1, 1991

Creator: Kuzminski, J.; Bush, T.; Coombes, R.; Devred, A.; DiMarco, J.; Goodzeit, C. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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A bulk niobium superconducting quarter wave resonator

A bath-cooled all-niobium 160 MHz quarter wave resonator prototype was constructed and tested. The objective of this research has been the development of a high performance accelerating element with {beta}{sub opt} {approx equal} 0.11 for the ALPI linac at the Laboratori Nazionali di Legnaro. The design of this resonator was based upon a previous 150 MHz model, with minor changes due to the different frequency and to modified welding procedure. An accelerating field of 5 MV/m was achieved at a … more

Date: January 1, 1990

Creator: Ben-Zvi, Ilan; Chiaveri, E.; Elkonin, B. V.; Facco, A. & Sokolowski, J. S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Development of superconductors for applications in high-field, high-current-density magnets for fusion research

The development of large-bore, high-field magnets for fusion energy applications requires a system approach to both magnet and conductor design. At Lawrence Livermore National Laboratory (LLNL), the criteria used to choose superconductors include: strain tolerance, radiation tolerance, heat removal, stability, fabricability, and cost. We report on the performance of industrially produced, prototype, Ti-modified Nb/sub 3/Sn wires developed with LLNL support. Wire performance characteristics eval… more

Date: September 26, 1986

Creator: Summers, L. T. & Miller, J. R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Fusion development and technology

This report discusses the following: superconducting magnet technology; high field superconductors; advanced magnetic system and divertor development; poloidal field coils; gyrotron development; commercial reactor studies--aries; ITER physics: alpha physics and alcator R D for ITER; lower hybrid current drive and heating in the ITER device; ITER superconducting PF scenario and magnet analysis; ITER systems studies; and safety, environmental and economic factors in fusion development.

Date: January 1, 1992

Creator: Montgomery, D.B.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Proposed uv-FEL user facility at BNL

The NSLS at Brookhaven National Laboratory is proposing the construction of a UV-FEL operating in the wavelength range from visible to 750{Angstrom}. Nano-Coulomb electron pulses will be generated at a laser photo-cathode RF gun at a repetition rate of 10 KHz. The 6 ps pulses will be accelerated to 250 MeV in a superconducting linac. The FEL output will serve four stations with independent wavelength tuning, using two wigglers and two rotating mirror beam switches. Seed radiation for the FEL am… more

Date: January 1, 1991

Creator: Ben-Zvi, Ilan; Di Mauro, L. F.; Krinsky, S.; White, M. G.; Yu, L. H.; Batchelor, K. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Recent work on normal and superconducting inductive energy storage switching at the Efremov Institute, Leningrad, USSR

Various forms of switches for both normal and superconducting inductive energy storage have been devised and developed at NIIEFA. At the present time, however, a major portion of the efforts of the Institute in these fields is being applied to the design and construction of coils for tokamak ''T-10M.'' The superconducting toroidal field coils (the design of which is still uncertain) will be switched by simple switches made of Nb-Ti ribbon. The normal coils for the poloidal field will be switche… more

Date: January 1, 1977

Creator: Machalek, M. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Axicell MFTF-B superconducting-magnet system

The Axicell MFTF-B magnet system will provide the field environment necessary for tandem mirror plasma physics investigation with thermal barriers. The performance of the device will stimulate DT to achieve energy break-even plasma conditions. Operation will be with deuterium only. There will be 24 superconducting coils consisting of 2 sets of yin-yang pairs, 14 central-cell solenoids, 2 sets of axicell mirror-coil pairs, and 2 transition coils between the axicell mirror coil-pairs and the yin-… more

Date: May 5, 1982

Creator: Wang, S. T.; Bulmer, R.; Hanson, C.; Hinkle, R.; Kozman, T.; Shimer, D. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Status of Oak Ridge National Laboratory fusion activities

This review covers the following research being carried out at ORNL: (1) confinement experiments such as ATF, EBT, and STX, (2) theory, (3) atomic physics, (4) shielding, (5) technology developments on superconducting magnets, pellet injection, rf plasma heating, and materials, and (6) fusion engineering design center. (MOW)

Date: January 1, 1985

Creator: Rosenthal, M.W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Electromagnetic (EM-60) survey in the Panther Canyon Area, Grass Valley, Nevada

Eight frequency domain electromagnetic soundings were measured over the Panther Canyon thermal anomaly in Grass Valley, Nevada. The data were collected with Lawrence Berkeley Laboratory's large moment horizontal loop system (EM-60). At the transmitter site located near the center of the thermal anomaly, square wave currents of up to 70 A were impressed into a fourturn 50 m radius coil at frequencies from 0.033 to 500 Hz. At the eight receiver sites, 0.5 to 1.5 km from the loop, magnetic fields … more

Date: May 1, 1980

Creator: Wilt, M.; Goldstein, N.; Stark, M. & Haught, R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Two phase cooling for superconducting magnets

A closed circuit tubular cooling system for superconducting magnets offers advantages of limiting boiloff and containing high pressures during quenches. Proper location of automatic valves to lower pressures and protect the refrigerator in the event of quenches is described. Theoretical arguments and exprimental evidence are given against a previously suggested method to determine He two phase flow regimes. If loss of flow occurs due to some types of refrigeration failure and transfer lines hav… more

Date: August 1, 1985

Creator: Eberhard, P. H.; Gibson, G. A.; Green, M. A.; Ross, R. R.; Smits, R. G.; Taylor, J. D. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department