[en] This patent describes insulation means in a superconducting solenoid disposed in a cryogenic bath. The solenoid is in the form of a cylindrical annulus having a vertical axis. It is comprised of: two conductors each containing superconductive material and each wound into a single layer helical coil; first and second support means each supporting a respective conductor; and insulation means

[en] In the on-going development of superconducting toroidal field coils for tokamak reactors, the Large Coil Program (LCP) managed by Union Carbide Corporation will include the design, fabrication, and testing of large superconducting coils to determine their feasibility for use in the magnetic fusion energy effort. Structural analysis of the large coil is essential to ensure adequate safety in the test coil design and confidence in the scalability of the design. This paper will discuss the action of tensile and shear loads on the various materials used in the coil. These loads are of magnetic and thermal origin

[en] The trend toward high magnetic fields in the development of Tokamak fusion reactors has increased interest in forced flow Nb₃Sn superconducting toroidal field coils. The Large Coil Program, administered by Union Carbide Corporation, has funded the development of such a magnet to determine its feasibility for use in the magnetic fusion energy effort. Conceptual design work aimed at the production of an 8 tesla peak field magnet for this program has been completed by Westinghouse Electric Corporation. The design concept resulting from this study, and its applicability to the long range Tokamak fusion reactor program are discussed

[en] In the development of superconducting toroidal field coils for Tokamak reactors, the Large Coil Program (LCP) will include the design, fabrication and testing of large superconducting coils to determine their feasibility. Structural design and analysis of the large coil is essential to ensure adequate safety in the test coil design and confidence in its scalability. This paper will discuss the design concept and the action of thermal, toroidal and poloidal field loading on the coil. The resultant stresses on the various materials of the coil along with the deflections are shown for the loading applied during operation. Structural analysis models used are discussed with the techniques and assumptions noted. Based on this analysis, a summary of the maximum equivalent tensile stress on the structure and superconductor during operation are presented. 3 refs

[en] The key features of the Nb/sub 3/Sn superconducting coil designed by the Westinghouse/Airco industrial team for the Large Coil Program are discussed. Tests on key components have been completed and indicate that performance characteristics will be excellent. 3 refs

[en] Three liquid nitrogen cooled transformers, two with 14.4 MJ and one with 33.5 MJ storage capacity, are being built to provide respective currents of 0.31 and 0.95 MA to drive a distributed rail gun and are designed to withstand respective voltages of 70 and 200 kV. The transformers are contained in fiberglass reinforced polyester plastic dewars to avoid eddy current coupling and lateral forces that would exist with a metal dewar. To improve the coupling between windings the secondary winding is made relatively thin and is supported structurally for magnetic loading against the outer primary winding. The coils are pool bath cooled. Normal and fault mode analyses indicated safe operation with some precautions for venting nitrogen gas provided

[en] Design features of a low-loss, fast-pulsed superconducting energy storage coil for fusion applications are discussed. The purpose of constructing this coil is to demonstrate the use of a low loss conductor of advanced design in a pool-boiling-cooled coil of the open, layered structure type. The second generation coil is designed to store 400 kJ at 25 kA, with a discharge time of 0.7 ms. The total energy loss during a full charge-discharge cycle is to be less than 0.3% of the stored energy. 5 refs

[en] The key features of the Nb³Sn superconducting magnet designed and presently being assembled by Westinghouse for the Large Coil Program are discussed with primary attention to the manufacture of the magnet. The conductor design, conductor joining method, and helium header combine with the modular bolted plate structural design to provide a magnet design and manufacturing concept which is completely scalable to future Fusion reactor service. A novel concept for the connection of conductor cable which allows the joint to be easily supported and encased by a helium header is described

[en] We describe the progress made on the design of readout electronics for a compensating scintillator plate calorimeter. 1 ref., 3 figs., 1 tab

[en] A scintillator calorimeter produces unique problems for the designer of readout electronics. On the one hand the narrow time structure of scintillator pulses, ∼10 nsec, is well matched to the rf structure of the SSC and gives hope of isolating information from individual beam crossings. On the other hand, the compensation mechanism and the need to broaden the pulse shape for use with analog signal sampling devices gives a somewhat wider time structure, ∼50-100 nsec. Furthermore the granularity of such a device implies that the full energy of an electromagnetic shower may be totally contained within one readout channel. If the resolution of the electronics is not to compromise the intrinsic resolution of the calorimeter, assumed to be σ/E ∼ 15%/√E + 1% (E in Gev), coverage of the full dynamic range (40,000:1) requires at least two 12-bit devices with 7 bits of overlap for a linear front-end electronics chain. The positioning of the electronics also is a critical issue. At luminosities of 10³³ cm^-2sec^-1, electronics placed on the calorimeter must withstand doses of at least 10¹⁰ neutron/cm² and 2,000 Rad per year at 90 degree. In the past year, the scintillating calorimeter collaboration has begun studying these and related issues. Among the work reported below is: a study related to remote location of the calorimeter electronics, a comprehensive program to evaluate the properties of FADCs capable of operation at 60-80 MHz, design of a analog memory unit and development of a benchmark system to help evaluate components under development both within and outside the authors' collaboration