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Window Frame or "Superferric" Magnet Design for Low B(<3t) Heavy Ion Storage Ring Study

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10 Author(s)
Danby, G. ; Brookhaven National Laboratory, Associated Universities, Inc. Upton, New York 11973 ; DeVito, B. ; Jackson, J. ; Keohane, G.
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Double magnets share common laminations without magnetic coupling. Single layer coils of rectangular conductor are dry wound on extruded bore tubes. Magnet construction requires no molding or prestress. Absence of superconducting (SC) magnetization fields in the aperture results in very large dynamic range. The coil is wound continuously across the midplane to give unusually large dynamic aperture. Above ~2.2 T saturation is corrected by simple sextupole windings with no inductive coupling to the dipole. Ultrastable design requires no internal quench protection. A quadrupole pair of novel design gives excellent field quality to B > 2 T without corrections, with no SC magnetization. Experience shows magnets are accurate enough for the assembly to take place at its final location. No training is required. Test procedures (measurements with search coils or with the beam) and cooldown properties are discussed.

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Nuclear Science, IEEE Transactions on  (Volume:32 ,  Issue: 5 )