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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
open access

Stability and disturbance of large dc superconducting 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: November 11, 1981
Creator: Wang, S. T.
Partner: UNT Libraries Government Documents Department
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Study of the radiation effects on nucleic acids and related compounds. Progress report, August 15, 1976--November 14, 1977

Description: The effects of ionizing radiation on nucleic acids and components were studied in vitro. Our approach involves four levels of operation and progress is being made at each stage. First, procedures were established to separate and purify three reactive radiation products from thymidine. Second, improved methods of synthesizing trans-glycols of pyrimidines were developed, and a new method for the stereospecific synthesis of cis-glycol of pyrimidines was realized. Thirdly, the Ames Salmonella test … more
Date: August 1, 1977
Creator: Wang, S. Y.
Partner: UNT Libraries Government Documents Department
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Study of the effects of radiation of nucleic acids and related compounds. Progress report, August 15, 1975--August 14, 1976

Description: Ionizing radiation produces genetic effects in biological systems. Since genetic effects are usually the result of modifications of DNA or sometimes of RNA, interest is being centered on the chemical and physical nature of radiation-induced lesions to nucleic acids and their components. These investigations have revealed the enormous complexity of chemical events and the possible degradation of nucleic acids by strand breakage. Therefore, work in the ionization radiation of nucleic acids has pr… more
Date: April 1, 1976
Creator: Wang, S. Y.
Partner: UNT Libraries Government Documents Department
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Study of the radiation effects on nucleic acids and related compounds. Annual progress report, August 15, 1974--August 14, 1975. [X radiation, hamster cells, Haemophilus influenzae]

Description: Interest is being centered on the chemical and physical nature of radiation-induced lesions to nucleic acids and their components. These investigations have revealed the enormous complexity of chemical events in these systems and the possible degradation of nucleic acids by strand breakage. Therefore, work in the ionizing radiation of DNA and its components has proceeded along a dual course. For chemical studies, our prime concern is the stepwise isolation and identification of the radiation pr… more
Date: January 1, 1975
Creator: Wang, S. Y.
Partner: UNT Libraries Government Documents Department
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Neutron irradiation effects on the mechanical properties of thorium and thorium--carbon alloy

Description: The effects of neutron exposure to 3.0 x 10/sup 18/ neutrons/cm/sup 2/ on the mechanical properties of thorium and thorium-carbon alloy are described. Tensile measurements were done at six different test temperatures from 4/sup 0/K to 503/sup 0/K and at two strain rates. Thorium and thorium-carbon alloy are shown to display typical radiation hardening like other face-centered cubic metals. The yield drop phenomenon of the thorium-carbon alloy is unchanged after irradiation. The variation of she… more
Date: April 1, 1978
Creator: Wang, S.C.P.
Partner: UNT Libraries Government Documents Department
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Effects of soldering void on recovery characteristics of a cryostable superconductor

Description: A conductor for a cryostable magnet is usually made by soldering a superconducting matrix to an OFHC copper strip. The presence of voids between the matrix and the stabilizer due to the imperfection in the soldering bond is of great concern to magnet designers. An experiment was set up to investigate the effect of the void on the characteristics of hot end recovery and cold and recovery for CFFF superconductors. Tests were made on samples having different lengths of soldering void under various… more
Date: January 1, 1980
Creator: Huang, Y. & Wang, S. T.
Partner: UNT Libraries Government Documents Department
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Argonne National Laboratory superconducting pulsed coil program

Description: The main objectives are to develop high current (approx. 100 kA) cryostable cable configurations with reasonably low ac losses, to build a demonstration pulsed coil, and to develop a rather inexpensive large fiberglass reinforced helium cryostat. A 1.5-MJ cryostable pulsed superconducting coil has been developed and constructed at ANL. The coil has a peak field of 4.5 T at an operating current of 11.0 kA. A large inexpensive plastic cryostat has been developed for testing the pulsed coil. The c… more
Date: January 1, 1979
Creator: Wang, S. T. & Kim, S. H.
Partner: UNT Libraries Government Documents Department
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Input parameters to codes which analyze LMFBR wire wrapped bundles. Revision 1

Description: This report provides a current summary of recommended values of key input parameters required for ENERGY code analysis of LMFBR wire wrapped bundles. This data is based on the interpretation of experimental results from the MIT and other available laboratory programs.
Date: May 1, 1979
Creator: Wang, S.F. & Todreas, N.E.
Partner: UNT Libraries Government Documents Department
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Development of a 50 kA cryostable ac superconducting cable

Description: A design of a 50 kA cable at 8 T for superconducting ohmic heating coils is presented. The cable, which will be cryostable with relatively low ac losses, is composed of 24 basic cables and stainless steel backbone. A non-metallic cryostat for the test of pancake coils of the cable is developed.
Date: November 1, 1979
Creator: Kim, S. H. & Wang, S. T.
Partner: UNT Libraries Government Documents Department
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Superconducting coil design for a tokamak experimental power reactor

Description: Superconducting toroidal field (TF) and polodial-field (PF) coils have been designed for the proposed Argonne National Laboratory experimental power reactor (EPR). Features of the design include: (1) Peak field of 8 T at 4.2 K or 10 T at 3.0 K. (2) Constant-tension shape for the TF coils, corrected for the finite number (16) of coils. (3) Analysis of errors in coil alignment. (4) Comparison of safety aspects of series-connected and parallel-connected coils. (5) A 60 kA sheet conductor of NbTi w… more
Date: January 1, 1977
Creator: Turner, L. R.; Wang, S. T. & Smelser, P.
Partner: UNT Libraries Government Documents Department
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Recovery of a cryostable magnet following a mechanical perturbation: one-dimensional and two-dimensional calculations

Description: When a cryostable composite conductor carrying current experiences a heat input from a mechanical perturbation, a normal region develops which initially propagates and then either collapses or continues to propagate. A computer model has been devised to study this phenomenon. The model incorporates initial or continuing heat input from mechanical perturbations, heat conducted to the neighboring elements of the conductor and, if appropriate, heat conducted through insulation to neighboring turns… more
Date: January 1, 1978
Creator: Turner, L. R.; Wang, S. T. & Harrang, J.
Partner: UNT Libraries Government Documents Department
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Stability calculations for MHD magnets

Description: When a cryostable composite conductor carrying current experiences a heat input from a mechanical perturbation, a normal region develops which initially propagates and then either collapses or continues to propagate. A computer model has been devised to study this phenomenon. The model incorporates initial or continuing heat input from mechanical perturbations, heat conducted to the neighboring elements of the conductor and, if appropriate, heat conducted through insulation to neighboring turns… more
Date: January 1, 1978
Creator: Turner, L. R.; Wang, S. T. & Harrang, J.
Partner: UNT Libraries Government Documents Department
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Design and construction of superconducting quadrupole magnets for ion beam fusion

Description: A high gradient superconducting quadrupole has been designed and developed as the heavy ion beam focussing element in the low velocity portions of an rf linac for the Argonne Ion Beam Fusion Reactor. The quadrupole magnets will require an extremely short magnet coil length (approximately 20 cm to 30 cm) and extremely high central gradients (approximately 100 T/m to 200 T/m). The useful warm bore will be about 4 to 6 cm and the integral gradient homogeneity should be constant to +-5% over the us… more
Date: January 1, 1978
Creator: Wang, S. T.; Ludwig, H. & Turner, L. R.
Partner: UNT Libraries Government Documents Department
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Magnets for the Mirror Fusion Test Facility: testing of the first Yin-Yang and the design and development of other magnets

Description: Completed in May 1981, the first Yin-Yang magnet for the tandem Mirror Fusion Test Facility (MFTF-B) at Lawrence Livermore National Laboratory (LLNL) was successfully tested in February 1982 to its full design field (7.68 T) and current (5775 A). Since that time, the entire magnet array has been reconfigured - from the original A-cell to an axicell design. The MFTF-B magnet array now contains a total of 26 large superconducting coils: 2 sets of yin-yang pairs, 2 sets of transition magnets (each… more
Date: January 5, 1983
Creator: Kozman, T. A.; Wang, S. T. & Chang, Y.
Partner: UNT Libraries Government Documents Department
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Beam-Beam Study on the Upgrade of Beijing Electron Positron Collider

Description: It is an important issue to study the beam-beam interaction in the design and performance of such a high luminosity collider as BEPCII, the upgrade of Beijing Electron Positron Collider. The weak-strong simulation is generally used during the design of a collider. For performance a large scale tune scan, the weak-strong simulation studies on beam-beam interaction were done, and the geometry effects were taken into account. The strong-strong simulation studies were done for investigating the lum… more
Date: February 10, 2006
Creator: Wang, S. & Cai, Y.
Partner: UNT Libraries Government Documents Department
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Fabrication experiences and operative characteristics of the U. S. SCMC superconducting dipole magnet for MHD research

Description: The U.S. SCMS superconducting dipole magnet system consists of the superconducting magnet and its cryostat, a helium liquifier and refrigerator/liquifier facility, helium storage dewars, the transfer line, power supply, and a complete system for magnet instrumentations and control. The magnet system has been designed and built by Argonne National Laboratory. The entire magnet system was successfully tested to full design field in May 1977. It was then safely delivered to Moscow in June 1977, an… more
Date: January 1, 1977
Creator: Wang, S. T.; Niemann, R. C. & Kustom, R. L.
Partner: UNT Libraries Government Documents Department
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Alternative connections for the large MFTF-B solenoids

Description: The MFTF-B central-cell solenoids are a set of twelve closely coupled, large superconducting magnets with similar but not exactly equal currents. Alternative methods of connecting them to their power supplies and dump resistors are investigated. The circuits are evaluated for operating conditions and fault conditions. The factors considered are the voltage to ground during a dump, short circuits, open circuits, quenches, and failure of the protection system to detect a quench. Of particular int… more
Date: May 20, 1983
Creator: Owen, E. W.; Shimer, D. W. & Wang, S. T.
Partner: UNT Libraries Government Documents Department
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Vapor locking and heat transfer of multiple layers

Description: The cryogenic stability of a superconducting magnet depends on the heat transfer characteristics of the liquid helium cooling channels. One of the factors which affects the heat transfer to the channel is the amount of vapor accumulated in the channel. It is especially important to design a large magnet with cooling channels large enough to ensure the recovery of a normal zone produced in the magnet following the mechanical disturbances. A study of the vapor formation and heat transfer of multi… more
Date: January 1, 1980
Creator: Chen, C. J.; Wang, S. T. & Dawson, J. W.
Partner: UNT Libraries Government Documents Department
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