Actions for Development work on superconducting coils for a large mirror fusion test facility (MFTF). [Nb--Ti] [electronic resource].

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Development work on superconducting coils for a large mirror fusion test facility (MFTF). [Nb--Ti] [electronic resource].

Published
Livermore, Calif. : Lawrence Livermore Laboratory, 1977.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: 7 : digital, PDF file
Additional Creators
Lawrence Livermore Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The geometry and size of the superconducting coils for the Mirror Fusion Test Facility (MFTF) proposed by Lawrence Livermore Laboratory (LLL) impose certain constraints on the Nb-Ti superconductor. The most promising fabrication process is a wrap-around technique in which a superconducting core is ''wrapped'' in stabilizing copper that contains built-in cooling channels. Insulation between pancake coils and turns is provided by perforated sheets and buttons of epoxy-impregnated fiberglass. Preliminary heat-transfer tests conducted on short samples of single conductor and on a nine-conductor bundle are reported and related to the heat generated in ''normal'' conductors. Investigation of joining techniques, necessary because of the length of conductor needed for the MFTF magnet (about 21 km per coil), show that cold-welded butt joints best meet all requirements. In a test coil now being built, approximately 2 km of prototype MFTF conductor will provide a self-field of about 4 T. Supplementary coils will boost the field to about 6.7 T. The test coils will be used to study cryostatic stability, the propagation and recovery of normal zones, and diagnostic techniques.
Report Numbers
E 1.99:ucrl-78891
E 1.99: conf-770842-1
conf-770842-1
ucrl-78891
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Note
Published through SciTech Connect.
07/27/1977.
"ucrl-78891"
" conf-770842-1"
6. international conference on magnet technology, Bratislava, Czechoslovakia, 29 Aug 1977.
Cornish, D.N.; Harvey, A.R.; Nelson, R.L.; Zbasnik, J.P.; Deis, D.W.; Hirzel, D.G.; Leber, R.L.; Johnston, J.E.
Funding Information
W-7405-ENG-48
View MARC record | catkey: 14755423