Three small superconducting magnets with active and passive shields that produce confined magnetic fields in low temperature cryostats have been designed and built. The design of these magnets uses both on and off-axis field calculations which are fed back to an optimization algorithm. These design principles and construction techniques are discussed.
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A number of solenoids have been constructed using an on-axis optimization calculation by H.M. Bozler, unpublished. An approach to simulating a superconducting shield by calculating the current distribution in the shield and then incorporating windings that approximated this distribution was used by U.E. Israelsson and C.M. Gould, Rev. Sci. Instrum.55, 1143 (1984). In this case the effect of the shield was fed back by hand to the on-axis optimization.
P.R. Bevington,Data Reduction and Error Analysis for the Physical Sciences, McGraw Hill (New York, 1969).
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Stapleton, C.R., Echternach, P.M., Tang, Y. et al. Radially shielded superconducting magnets for use in cryostats. J Low Temp Phys 89, 755–758 (1992). https://doi.org/10.1007/BF00694134
- Magnetic Field
- Optimization Algorithm
- Magnetic Material
- Design Principle
- Field Calculation