Abstract
The possibility of superferric accelerator and beam line magnets is described. A cooling system that is not helium and nitrogen based, but one based on hydrogen, is proposed to make full use of the recent MgB/sub 2/ superconductor around 20 K. A hydrogen cooling system is more effective than the nitrogen cooling for usual high T/sub c/ superconductors around 70 K. Liquid hydrogen is also excellent as refrigerant for high T/sub c/ superconducting apparatus to increase the critical current and to provide a self-sustained cooling system by means of a combination of evaporated hydrogen and a fuel cell. This paper also discusses hydrogen safety issues, as compared to that of helium and nitrogen. It is expected that dipole magnets for a synchrotron would be good candidates for a superferric design based on these principles.
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