A Superconducting 0.54-MJ Pulsed Energy Storage Coil
A superconducting pulsed energy storage coil has been designed and built for the Los Alamos Scientific Laboratory. The energy storage coil specification required an energy store of 0.3 MJ at a current of 10 kA with a discharge time of 2 msec. In addition, the coil structure was required to withstand the forces resulting from a current of 12.5 kA and stored energy of 0.47 MJ. The design inductance of the coil was 6 mH resulting in a design terminal voltage of 40 kV for the 2-msec discharge. The superconductor current density was to exceed two-thirds of the short sample value measured along the load line with cooling provided by immersion in a liquid helium dewar. The losses in the coil due to eddy currents, self-field, and hysteresis were limited by specification to 1.0% during discharge. This efficiency requirement necessitated a nonconducting structure for coil support.
KeywordsConvection Helium Assure Boiling Nylon
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- 1.J. D. Rogers et al., in: Advances in Cryogenic Engineering, Vol. 23, Plenum Press, New York (1978), p. 48.Google Scholar
- 3.J. D. G. Lindsay and D. M. Weldon, Los Alamos Scientific Laboratory Rept. LA-6790-MS, May 1977.Google Scholar
- 4.E. Mullan, D. W. Deis, P. W. Eckels, H. E. Haller, M. A. Janocko, S. A. Karpathy, D. C. Litz, C. J. Mole, P. Reichner, Z. N. Sanjana, and M. S. Walker, “Design and Fabrication of 300 kJ Superconducting Energy Storage Coil,” Westinghouse Final Rept. E.M.5077, Subcontract No. XN4-32767-3, July 1977.Google Scholar
- 5.G. B. Wallis, One-Dimensional Two-Phase Flow, McGraw-Hill, New York (1969), p. 305.Google Scholar