Magnetic field decay in model SSC dipoles [electronic resource].
- Berkeley, Calif. : Lawrence Berkeley National Laboratory, 1988. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: 4 : digital, PDF file
- Additional Creators:
- Lawrence Berkeley National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- We have observed that some of our model SSC dipoles have long time constant decays of the magnetic field harmonics with amplitudes large enough to result in significant beam loss, if they are not corrected. The magnets were run at constant current at the SSC injection field level of 0.3 tesla for one to three hours and changes in the magnetic field were observed. One explanation for the observed field decay is time dependent superconductor magnetization. Another explanation involves flux creep or flux flow. Data are presented on how the decay changes with previous flux history. Similar magnets with different Nb-Ti filament spacings and matrix materials have different long time field decay. A theoretical model using proximity coupling and flux creep for the observed field decay is discussed. 10 refs., 5 figs., 2 tabs.
- Published through SciTech Connect., 08/01/1988., "lbl-25139", " conf-880812-32", "DE89004791", Applied superconductivity conference, San Francisco, CA, USA, 21 Aug 1988., and Green, M.A.; Gilbert, W.S.; Scanlan, R.M.; Benjegerdes, R.W.; Althaus, R.F.; Barale, P.J.
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