Abstract
A thin, superconducting solenoid for the Time Projection Chamber (TPC) experiment at PEP was constructed at Lawrence Berkeley Laboratory (LBL) in 19791 and tested in 1980. A failure of the ground plane insulation damaged the coil to the point that it required rebuilding. An extensive study of this failure2 indicated that an iron chip embedded in the bore tube had penetrated the insulation. Before rebuilding the coil, the insulation system was investigated with the goal of determining the most reliable techniques and materials for withstanding high voltages in the coil package.
This work was supported by the Director, Office of Energy Research, Office of High Energy and Nuclear Physics, Division of High Energy Physics of the U.S. Department of Energy under Contract No. W-7405-ENG-48.
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References
M. A. Green et al., “Progress on the Superconducting Magnet for the Time Projection Chamber Experiment (TPC) at PEP,” Report LBL-11007, Lawrence Berkeley Laboratory, Berkeley, California (May 1980).
M. A. Green et al., Ground plane insulation failure in the first TPC superconducting coil, presented at the International Conference on Magnet Technology, Karlsruhe, West Germany (30 March-3 April 1981 ).
M. A. Green, D. E. Coyle, P. B. Miller, and W. F. Wenzel, Vacuum impregnation with epoxy of large superconducting magnet structures, in: “Nonmetallic Materials and Composites at Low Temperatures,” Plenum Press, New York (1979), p. 409.
J. Billan, Selection of the insulation of superconducting wires for d.c. magnet, “Proceedings of the International Symposium on High Voltage Insulation for Low Temperature Application,” CERN-ISR-LTD/76-13, Wroclaw, Poland (13–17 September 1976 ).
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© 1982 Plenum Press, New York
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Taylor, J.D., Martin, P.S., Pripstein, M., Green, M.A. (1982). Cryogenic Tests of Glass-Epoxy-Based Electrical Insulation. In: Reed, R.P., Clark, A.F. (eds) Advances in Cryogenic Engineering Materials . Advances in Cryogenic Engineering Materials , vol 28. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3542-9_29
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DOI: https://doi.org/10.1007/978-1-4613-3542-9_29
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