Specification of the power supply for a 6-pole combined horizontal and vertical corrector magnet
Light Source Note LS-176 lists four types of corrector magnets and their power supply specifications. In order to simplify the AC operation of corrector magnets for closed orbit correction feedback, adopting a single type of corrector magnet for the whole ring is currently considered. This corrector magnet has six poles (an adaption from the ring sextupole magnet) and has coil windings producing independent horizontal and vertical bending fields. As in the other correctors, the vacuum chamber eddy current dominates the AC operation of the magnet which affects the voltage specification of the power supplies. In this note, the physical requirements of the magnets will be reviewed, and the relevant magnet and power supply parameters will be reported. A few assumptions on the local bump geometries have changed since the publication of LS-176. The inner correctors of the straight section bump have been moved about 0.15 m inwards to conform with current vacuum chamber design. This decreases the required magnet strengths by 15% relative to those in LS-176. As of the publication date of this report, the locations of the two outboard correctors of the straight section bump are set midway between the quadrupoles Ql and Q2. Moving these correctors closer to the Q2`s will further reduce the corrector strength required. Therefore, two results are presented: one with the two outward correctors remaining at their current design locations, and one with the outward correctors moved right up against quadrupole Q2. Also, the parameters for the bending magnet beamline bump are recalculated for a photon source placed 1/8th downstream of the entrance of the magnet.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 104762
- Report Number(s):
- LS-188; ON: DE95015202; TRN: 95:020325
- Resource Relation:
- Other Information: PBD: 20 Feb 1992
- Country of Publication:
- United States
- Language:
- English
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