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Tests of Fermilab built 40 mm aperture full length SSC dipole magnets

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50 Author(s)
Koska, W. ; Fermi Nat. Accel. Lab., Batavia, IL, USA ; Bleadon, M. ; Bossert, R. ; Carson, J.
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Several 40-mm-aperture, 17-m-long dipoles have been built by Fermilab as developmental prototypes for the Superconducting Super Collider (SSC). These magnets have an external inner-outer coil splice design, a collet style end clamp assembly, a new, analytically designed minimum stress coil end design, and a new insulation system which does not employ shims or `shoes'. In addition, the magnets were built using production-style tooling. The magnets were tested at the Fermilab Magnet Testing Facility. Quench testing and mechanical measurement results are presented and analyzed with emphasis on the new design and fabrication features of these magnets. The performance of these magnets was very good from a quench and mechanical behavior standpoint. The magnets did not exhibit excessive training behavior and only one training quench was below the nominal operating current. The coil prestress remained positive to >7 T in both magnets and most of the quenches originated in the high field region of the pole turn

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Magnetics, IEEE Transactions on  (Volume:28 ,  Issue: 1 )