Magnets for fields above 100 kg

Classifying coils above and below 100 kG does not separate types or methods, but rather indicates the degree of difficulty. It is no longer true that conventional dc fields above 100 kG require larger than existing or contemplated power supplies, and it has been established that superconducting materials will be suitable for fields approaching twice that field. Problem areas, economics, and experience above 100 kG are discussed in three major areas: 1) water-cooled dc magnets, principally those now in operation at the National Magnet Laboratory; 2) pulse magnets covering the continuum from sub-millisecond pulses to the low-duty cycle cryogenic magnet systems; 3) superconducting magnets with emphasis on hybrid systems, combining water-cooled copper magnets and superconducting coils.