NDLI: Combined function magnets using double-helix coils

Content Provider	IEEE Xplore Digital Library
Author	Goodzeit, C. Meinke, R. Ball, M.
Copyright Year	2007
Description	Author affiliation: Adv. Magnet Lab., Melbourne (Goodzeit, C.; Meinke, R.; Ball, M.)
Abstract	We describe a technology for creating easy-to- manufacture combined function magnets. The field is produced by double-helix coils in which the axial path of the windings is defined by a sinusoidal function containing the superposition of the desired multipoles. The result is a magnet that can contain, for example, a pure dipole field with superimposed multipole fields whose magnitude relative to the dipole field can be easily controlled to any level. We show how low level (i.e. 0.1%-1%) modulation amplitudes of the superimposed multipoles can be used as built-in or "free" correction coils to compensate for iron saturation effects or geometrically-induced multipoles. The combined function winding can also be used to superimpose a dipole and quadrupole winding where the quadrupole integral of Gdl can be adjusted to any level desired over the length of the main dipole magnet. In this way a "free" quadrupole can be obtained within a dipole. The characteristics of this type of combined function magnet are also discussed.
Starting Page	560
Ending Page	562
File Size	388342
Page Count	3
File Format	PDF
ISBN	9781424409167
DOI	10.1109/PAC.2007.4440278
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Conductors Iron Geometry Superconducting coils Superconducting magnets Synchrotrons Power system harmonics Amplitude modulation Magnetic modulators Azimuthal angle
Content Type	Text
Resource Type	Article

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