Air Core Cryogenic Magnet Coils for Fusion Research and High-Energy Nuclear Physics Applications
In the fields of controlled fusion research and high-energy nuclear physics it is becoming evident that means for the efficient generation of very high magnetic fields must be sought. Since ferromagnetic materials are of no help at the required fields of 105 gauss, one can only rely on the use of air core coils, so that the fields which can be reached depend only on the ampere-turns achievable and simple geometrical factors. In this case the limitations on attainable fields usually come down to a question of available electrical power, or, more fundamentally, to limitations imposed by heating of the coil conductors and problems of heat transfer within the coil. For laboratory — sized magnets, the limit is reached in magnets such as the Bitter magnet, where the ultimate limit is nearly reached in power density and heat transfer while achieving steady fields of 105 gauss in volumes of the order of 1 liter.
KeywordsHigh Magnetic Field Magnet Loss Magnet Coil Refrigeration Cycle Magnetic Energy Density
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- 1.J. L. Olsen, Helvetica Phys. Acta, Vol. 26, p. 798 (1953).Google Scholar
- 4.D.R. Wells, Project Matterhorn Technical Memo-NYO-6375 (September, 1956).Google Scholar
- 5.R. F. Post, UCRL-4231 (1954).Google Scholar
- 7.D. K. C. MacDonald, Handbuch der Physik, Vol. 14.Google Scholar
- 8.D. K. C.. MacDonald, Proc. Roy. Soc. A202, p. 103 (1950).Google Scholar
- 9.F. Bitter, Rev. Sci. Inst, Vol.7, p. 379 (1936);Google Scholar
- 11.A. N. Gennetsen, Handbuch der Physik, Vol. 14, p. 210.Google Scholar
- 12.D. K. C. MacDonald and K. Mendelssohn, “The resistivity of Na at low temperatures,” Proc. Roy. Soc. A202, p. 103 (1950).Google Scholar
- 13.G. W. Horsley, “The purification of sodium by vacuum distillation,” AERE, Report M/R, p. 1152 (1953).Google Scholar
- 14.D. K. C. MacDonald, G. K. White, and S.B. Woods, Proc. Roy. Soc. A235, p. 358 (1956).Google Scholar
- 15.R. J. Corruccini, Chem. Eng. Prog., Vol. 53, pp.262,342, and 397 (1957).Google Scholar
- 17.R. G. Chambers, Proc. Roy. Soc. A238, p. 344 (1956).Google Scholar