Beams Document 2543-v1

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The MI Wide Aperture Quadrupole (WQB) Project

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David J. Harding
Updated by:
David J. Harding
Document Created:
03 Nov 2006, 10:28
Contents Revised:
03 Nov 2006, 10:28
Metadata Revised:
03 Nov 2006, 11:17
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In the design stage of the Main Injector it was recognized that the old Main Ring quadrupoles would pose an aperture limit at the injection and extraction points, especially at the locations where they are positioned between two Lambertson magnets. With the increasing beam intensities required to support neutrino production in the NuMI beam line, the problem became more pressing. This deficiency has now been corrected by replacing those limiting magnets with newly designed and constructed quadrupoles that have the same length and integrated gradient as the old magnets, run on the same bus, but have a pole tip diameter greater by 32%. We will describe the magnet design, construction, measurement, installation, and operation, as well as demonstrating success in matching the Main Injector optics and increasing the aperture.
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Slides from an Accelerator Physics and Technology Seminar given 2 November 2006
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