Title :
Normal-zone propagation in adiabatic superconducting magnets. II. Quench properties of a 12 coil 17.6 T 750 MHz NMR magnet
Author :
Zhao, Z.P. ; Iwasa, Y. ; Williams, J.E.C. ; Bobrov, E.S. ; Zhukovsky, A. ; Hirose, R.
Author_Institution :
Francis Bitter Nat. Magnet Lab., MIT, Cambridge, MA, USA
fDate :
3/1/1993 12:00:00 AM
Abstract :
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.<>
Keywords :
digital simulation; nuclear magnetic resonance spectroscopy; quenching (thermal); stress analysis; superconducting magnets; 17.6 T; 750 MHz; NMR magnet; NbTi coils; adiabatic superconducting magnets; analytical quench analysis; epoxy resin impregnated solenoid; heater-induced simultaneous quench; internal quench voltage; magnet insulation strength; normal zone propagation; nuclear magnetic resonance; overloading strain; overloading stress; quench simulation code; sequential quench; superconducting solenoids; Magnetic analysis; Magnetic field induced strain; Magnetic resonance; Niobium compounds; Nuclear magnetic resonance; Solenoids; Stress; Superconducting coils; Superconducting magnets; Titanium compounds;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
