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Normal-zone propagation in adiabatic superconducting magnets. II. Quench properties of a 12 coil 17.6 T 750 MHz NMR magnet

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6 Author(s)
Z. P. Zhao ; Francis Bitter Nat. Magnet Lab., MIT, Cambridge, MA, USA ; Y. Iwasa ; J. E. C. Williams ; E. S. Bobrov
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For pt.I see ibid., vol.31, p.817 (1991). A quench simulation code was developed for multisection, epoxy-resin-impregnated, superconducting solenoids. The analysis of a 12 coil, 17.6 T, 750 MHz nuclear magnetic resonance (NMR) magnet shows that the overloading stress and strain in a heater-induced simultaneous quench are much lower than those in a sequential quench unaided with heaters. The analytical quench results are generally consistent with the experimental data for the five outer NbTi coils in the system. The analysis indicates that the magnet insulation strength should be no less than 1 kV, the maximum internal quench voltage of the system.<>

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IEEE Transactions on Applied Superconductivity  (Volume:3 ,  Issue: 1 )