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in subjects: "420201 -- Engineering-- Cryogenic Equipment & Devices"  
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TPC magnet cryogenic system

Description: 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.
Partner: UNT Libraries Government Documents Department
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Effects of low-temperature fusion neutron irradiation on critical properties of a monofilament niobium-tin superconductor

Description: The objective of this work was to irradiate a Nb/sub 3/Sn superconductor with 14.8 MeV neutrons at 4 K and measure critical current in transverse fields of up to 12 T, irradiating up to a fluence sufficient to decrease the critical current to below its initial value. Critical temperatures were also to be measured. The samples were to be kept near 4 K between the irradiation and the measurement of critical properties. This work is directed toward establishing an engineering design fluence limit … more
Date: March 22, 1984
Creator: Guinan, M.W.; Van Konynenburg, R.A. & Mitchell, J.B.
Partner: UNT Libraries Government Documents Department
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Energy and technology review

Description: Three areas of research are discussed: microcomputer technology applied to inspecting machined parts to determine roundness in ultraprecision measurements; development of an electrolytic technique for preparing dinitrogen pentoxide as a potentially less expensive step in the large-scale synthesis of the explosive HMX; and the application of frequency conversion to short wavelengths in the Novette and Nova lasers to improve the performance of inertial-confinement fusion targets. (GHT)
Date: August 1, 1982
Partner: UNT Libraries Government Documents Department
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Superconducting fault current limiter. Sixth quarterly technical progress report, November 8, 1979-February 7, 1980

Description: Progress in developing an improved superconducting fault current limiter (SCFCL) is described. A mathematical model of the most promising SCFCL design was used for determining transient characteristics, thermal recovery characteristics, and for evaluating types of shunt resistors. Some experimental work was done on Nb/sub 3/Sn film properties. (LCL)
Date: January 1, 1980
Partner: UNT Libraries Government Documents Department
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D7H-test results

Description: Data were reduced from the voltage-time relations stored in files D7H001 to D7H090 on HP1000. The I-B calibration curve is included. The data base is shown and can be used by the 9845B. The data include the quench location, Q/sub 2/ layer 1 top, Q/sub 3/ layer 1 bottom and the quench current and its normalized value with respect to short sample, I/sub c/ = 4920A at 4.4 K, I/sub c/ = 6710 A at 1.8 K. The resistance (..cap omega../cm) was calculated using the propagation time according to the vol… more
Date: July 30, 1982
Creator: Caspi, S.
Partner: UNT Libraries Government Documents Department
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Letter report for the Superconducting Magnet Development Program, April 1, 1977--June 30, 1977

Description: The results and accomplishments of the Superconducting Magnet Development Program (SCMDP) for the second quarter of the calendar year 1977 are summarized. The presentations are arranged according to projects rather than the group organization by discipline of the Magnetics and Superconductivity Section. The design, procurement, and fabrication of the Large Coil Segment are well under way. Significant progress is reported on the conductor stability and loss experiments for both toroidal field co… more
Date: November 1, 1977
Creator: Fietz, W. A. & Lubell, M. S.
Partner: UNT Libraries Government Documents Department
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Stability and disturbance of large dc supeconducting magnets

Description: This paper addresses the stability aspects of several successful dc superconducting magnets such as large bubble chamber magnets, and magnets for the Mirror Fusion Test Facility and MHD Research Facility. Specifically, it will cover Argonne National Laboratory 12-Foot Bubble Chamber magnets, the 15-foot Bubble Chamber magnets at Fermi National Laboratory, the MFTF-B Magnet System at Lawrence Livermore National Laboratory, the U-25B Bypass MHD Magnet, and the CFFF Superconducting MHD magnet buil… more
Date: January 1, 1981
Creator: Wang, S. T.
Partner: UNT Libraries Government Documents Department
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Superconducting magnet development for tokamaks and mirrors: a technical assessment

Description: The role of superconducting magnets in Magnetic Fusion Energy Research and Development is assessed from a consideration of program plans and schedules, the present status of the programs and the research and development suggestions arising from recent studies and workshops. A principal conclusion is that the large superconducting magnet systems needed for commercial magnetic fusion reactors can be constructed. However such magnets working under severe conditions, with increasingly stringent rel… more
Date: November 1, 1977
Creator: Laverick, C.; Jacobs, R. B.; Boom, R. W. & Henning, C. D.
Partner: UNT Libraries Government Documents Department
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Finite element and node point generation computer programs used for the design of toroidal field coils in tokamak fusion devices

Description: The structural analysis of toroidal field coils in Tokamak fusion machines can be performed with the finite element method. This technique has been employed for design evaluations of toroidal field coils on the Princeton Large Torus (PLT), the Poloidal Diverter Experiment (PDX), and the Tokamak Fusion Test Reactor (TFTR). The application of the finite element method can be simplified with computer programs that are used to generate the input data for the finite element code. There are three are… more
Date: June 1, 1975
Creator: Smith, R. A.
Partner: UNT Libraries Government Documents Department
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Superconducting fault current limiter. Fourth quarterly technical progress report, May 8-July 7, 1979

Description: Up until now, this project has established performance objectives for the superconducting fault current limiter (SCFCL) in terms of the limitations of circuit breakers and strategies for locating the SCFCLs within the system. During this fourth quarter, the possibility has also been explored of using SCFCLs to protect specific machines, namely superconducting alternators and transformers. Unique characteristics and requirements of these machines are identified in section 2 of this report and th… more
Date: January 1, 1979
Partner: UNT Libraries Government Documents Department
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Design of force-cooled conductors for large fusion magnets

Description: Conductors cooled by supercritical helium in forced convection are under active consideration for large toroidal fusion magnets. One of the central problems in designing such force cooled conductors is to maintain an adequate stability margin while keeping the pumping power tolerably low. A method has been developed for minimizing the pumping power for fixed stability by optimally choosing the matrix-to-superconductor and the metal-to-helium ratios. Such optimized conductors reduce pumping powe… more
Date: January 1, 1977
Creator: Dresner, L. & Lue, J.W.
Partner: UNT Libraries Government Documents Department
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Switching tests for the LCTF protective dump circuit

Description: Each of the six coils in the Large Coil Test Facility (LCTF) has a separate power supply, dump resistor, and switching circuit. Each switching circuit contains five switches, two of which are redundant. The three remaining switches perform separate duties in an emergency dump situation. These three switches were tested to determine their ability to meet the LCTF conditions.
Date: April 1, 1982
Creator: Parsons, W.M.
Partner: UNT Libraries Government Documents Department
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Tiber winding pack design

Description: A preliminary winding pack design was performed with the goal of showing feasibility of producing 10-T maximum field with a pack current density of 40 A.mm/sup -2/ while accepting 2.7 kW per coil nuclear heating. A cable-in-conduit conductor design (CIC), reported at the 6th Topical Meeting on the Technology of Fusion Energy, was based on several key issues.
Date: August 19, 1985
Creator: Miller, J. R.
Partner: UNT Libraries Government Documents Department
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Mirror Fusion Test Facility-B (MFTF-B) axicell configuration: NbTi magnet system. Manufacturing/producibility final report. Volume 2

Description: This Final MFTF-B Manufacturing/Producibility Report covers facilities, tooling plan, manufacturing sequence, schedule and performance, producibility, and lessons learned for the solenoid, axicell, and transition coils, as well as a deactivation plan, conclusions, references, and appendices.
Date: May 1, 1985
Creator: Ritschel, A.J. & White, W.L.
Partner: UNT Libraries Government Documents Department
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Super magnets for interaction regions

Description: The feasibility of using superconducting magnets in the beam interaction regions of particle accelerators is discussed. These higher field magnets can be shorter, leaving more room for detectors, but also must have a large aperture and magnetic shielding. The ''kissing geometry'' was investigated, and design and scaling considerations are given. A rough estimate of the cost of such superconducting magnets is given as an aid to the selection of interaction geometry. (PMA)
Date: January 1, 1977
Creator: Biallas, G.; Fowler, W. & Diebold, R.
Partner: UNT Libraries Government Documents Department
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Radiation effects on insulators for superconducting magnets

Description: In order to determine the radiation stability of electrical insulation that could be used in a superconducting magnet for containment of the plasma in a fusion energy device, 55 specimens of eight types of organic insulation were irradiated to a dose of about 2 x 10/sup 8/ R (2 x 10/sup 6/ J/Kg) at a temperature of 4.8 K in the Low-Temperature Irradiation Facility in the Bulk Shielding Reactor at Oak Ridge National Laboratory. Four of the specimens were monitored for changes in electrical resis… more
Date: January 1, 1978
Creator: Kernohan, R.H.; Coltman, R.R. Jr. & Long, C.J.
Partner: UNT Libraries Government Documents Department
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Deals magnet concept: applications and development

Description: The important highlights of the applination of the DEALS (Demountable Externally Anchored Low Stress) magnet system to MFE Tokamak devices are presented. Benefits of the concept for the construction of superconducting toroidal field coils are outlined. Emphasis is placed on the application of DEALS to a high field collisional Tokamak device and various design parameters for such a device and the corresponding DEALS coils are listed. An engineering Tokamak of PLT size is described in which the D… more
Date: March 1, 1977
Creator: Powell, J.; Hsieh, S.Y. & Lehner, J.
Partner: UNT Libraries Government Documents Department
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Semiannual report for the period April 1-September 30, 1979 of work on: (1) Superconducting power transmission development; (2) Cable insulation development. Power Transmission Project Technical Note No. 99

Description: The objective of the program is to develop an underground superconducting power transmission system which is economical and technically attractive to the utility industry. The system would be capable of carrying very large blocks of electric power, thus enabling it to supplant overhead lines in urban and suburban areas and regions of natural beauty. The program consisted initially of work in the laboratory to develop suitable materials, cryostats, and cable concepts. The materials work covers t… more
Date: January 15, 1980
Partner: UNT Libraries Government Documents Department
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Tokamak poloidal field systems. Progress report, January 1-December 31, 1979

Description: Work is reported on the development of superconducting tokamak poloidal field systems (TPFS). Progress is discussed on the design of a 20 MJ, 50 kA, 7.5 T superconducting pulsed energy storage coil operated in a 1 to 2 s bipolar mode from +7.5 T to -7.5 T in 1982. Conductor development for the coil is presented. A facility that uses a traction motor energy transfer system to test coils in the 20 to 100 MJ energy range is discussed. Current interrupter development and testing for protection and … more
Date: May 1, 1980
Creator: Rogers, J.D. (comp.)
Partner: UNT Libraries Government Documents Department
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Ultra-high-field superconducting magnets

Description: The following topics are considered: (1) superfluid helium for advanced magnets, (2) conductor reinforcement, (3) designing a 20-T, 2-m bore solenoidal coil, (4) coil size and conductor properties, (5) axial forces on the coil, (6) effect of radiation on the coil systems, and (7) helium-II transient heat transfer and coil protection. (MOW)
Date: August 1, 1983
Creator: Hoard, R. W.; Cornish, D. N.; Scanlan, R. M.; Zbasnik, J. P.; Leber, R. L.; Hickman, R. B. et al.
Partner: UNT Libraries Government Documents Department
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Simulation program for central helium liquefier

Description: The computer program described here analyzes the performance of Fermilab Central Helium Liquefier (CHL) and predicts the values of the plant thermodynamic variables at all process points in the plant. To simulate CHL, this program is modified from the prototype program which was developed by Hitachi Ltd. a couple of years ago. This program takes care of only the steady state simulation and takes account of the change of the turbine efficiency, the pressure drops and the UA values of the heat ex… more
Date: February 20, 1984
Creator: Kawamura, S.
Partner: UNT Libraries Government Documents Department
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Final report on NRIP-funded magnetic refrigerator development project, July 1, 1975--October 1, 1977. [New Research Initiatives Program (NRIP)]

Description: A brief overview of Los Alamos Scientific Laboratory work on magnetic refrigeration which is covered in five publications is given. Two publications discuss the rudimentary refrigerators built at Los Alamos; two, the performance expected from more advanced designs; and one, the heat transfer experiments performed to provide the data necessary for implementation of those designs. The work discussed in each of these publications and the overall conclusions are described.
Date: February 1, 1978
Creator: Steyert, W.A.
Partner: UNT Libraries Government Documents Department
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Effects of irradiation and mechanical stress on the superconducting properties of candidate magnet conductors

Description: The effects of radiation damage on the superconducting critical properties of candidate magnet materials are reviewed. Neutron, and charged-particle irradiation results are covered. The discussion is restricted to effects in NbTi and the A15-compound superconductors. The utility of these conductors in radiation fields is first explored by defining the magnitude of critical-property changes with the fluence of various irradiating particles. The physical mechanisms that couple the irradiation def… more
Date: January 1, 1980
Creator: Snead, C. L., Jr. & Luhman, T.
Partner: UNT Libraries Government Documents Department
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Superconductor procurement and R and D for SSC

Description: We describe the results of superconductor procurements for SSC dipole model magnets. Most results will pertain to LBL procurements for the LBL-BNL collaboration; however, where appropriate to complete the SSC data base, reference will be made to material purchased by FNAL and TAC. Also, most of the results to be presented will relate to the conventional SSC conductors, i.e., with filament sizes in the range of 15 to 25 ..mu..m. Some information on fine filament NbTi material, such as quantities… more
Date: June 1, 1985
Creator: Scanlan, R.; Royet, J.; Hannaford, R. & Horler, D.
Partner: UNT Libraries Government Documents Department
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