Several candidate conductors exist unfortunately, all of these new materials are brittle, and thus pose new challenges to the magnet designers. In order to reach fields above 10 T, magnet designers must turn to new materials with higher critical fields than that of NbTi. (2) emphasis on conductor development and new magnet designs and (3) goals of such a program might be (a) the development of a 9-10 Tesla magnet based on NbTi technology (b) the development of high quality quadrupoles with gradients in the range 250-300 T/m and (c) initiation of R&D activities aimed at moving beyond the existing technology as appears to be required for the development of a magnet operating at 12-15 Tesla. As such, the highest priority for the future of hadron facilities in the U.S. The participants arrived at the following conclusions with regard to superconducting magnets: (1) Superconducting magnets are the enabling technology for high energy colliders. in 1994, examined two possible facilities-a 2-TeV on 2-TeV collider and a 30-Tev on 30-Tev collider. The Division of Particles and Fields Workshop on Future Hadron Facilities in the U.S., held at Indiana U. Several recent studies have addressed the issues involved in taking the next step beyond the LHC. more » The LHC, now under construction, pushes the ductile superconductor, NbTi, to its limit in dipoles designed to operate at fields of 8.6 T at 1.8 K. However, the SSC R&D effort did succeed in demonstrating the reliable operation of dipole magnets up to 6.6 T. The next major project was the ill-fated SSC, which was cancelled in 1993. This success was followed a few years later by HERA, an electron-proton collider that uses superconducting quadrupoles and dipoles of a design similar to those in the Tevatron. This machine, utilizing dipole magnets operating at 4.5 T, has been operating successfully for the past 12 years. The application of superconducting magnets to large-scale particle accelerators was successfully demonstrated with the completion of the Tevatron at Fermilab in 1983. The new facility will provide vacuum around the test stand, cryogenics, power, control and data systems. The arrangement chosen for the coil tests is a 6-coil compact torus, in which coils of different internal design can be assembled to generate the magnetic field required for realistic testing. The required cryostabilization will be achieved in the NbTi coils by cooling with boiling helium in the Nb/sub 3/Sn coil, by forced flow of supercritical helium. Two test coils will use NbTi conductor the other, Nb/sub 3/Sn. Each LCP test coil will have a 2.5 x 3.5 m D-shape winding bore and will operate with a conductor current of 10 to more » 16 kA, at a peak field of 8 tesla while subjected to pulsed fields up to 0.14 T and simulated radiation heating. Concurrently a large coil test facility is being constructed at Oak Ridge. industrial teams are under contract to design and fabricate at least one coil each, to guidelines and specifications established by the Program.
Large Coil Program was established to accomplish the design, fabrication, and testing of large coils of competing designs, under conditions approximating those in a reactor.
Although the funding for the SSC was canceled, the results of the research and development project for construction of this unique facility will find application in other large-scale construction and manufacturing = ,Īs part of the development of superconducting toroidal field coils for tokamak reactors, the U.S. The objectives of the simulation study were to understand the dynamic behavior of the system and to explore strategies for control. The Advanced Continuous Simulation Language (ACSL) was used to encode a mathematical model of the system. This paper describes a computer simulation of the coil winding apparatus. The control problem consists of multiple interacting control loops. The amount of plastic deformation in the conductor must be tightly controlled to pack it into the large bobbin with a certain desired force. The speed of conductor payout must be coordinated from a small spool through two stages of roll formers to the final coil shape on a large bobbin. Several process variables must be controlled to demanding tolerances during the coil winding operation.
The magnet windings of the SSC consist of conductor coils which are placed around a torus to generate a strong magnetic field within the torus. A unique apparatus has been designed to shape the magnet windings for the Superconducting Supercollider (SSC).
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