Saturation Control in RHIC DipolesVariation in |B| in Iron Yoke

• Compare azimuthal variation in |B| with and without saturation control holes. Holes, etc. increase saturation in relatively lower field regions; a more uniform iron magnetization reduces the saturation induced harmonics.

• Old approach: reduce saturating iron with elliptical aperture, etc.

• New approach: increase saturating iron with holes, etc. at appropriate places.

With out holes

With holes

Previous slide

Next slide

Back to first slide

View graphic version