Orbit Feedback using X-ray Beam Position Monitoring at the Advanced Photon Source

Details Orbit Feedback using X-ray Beam Position Monitoring at the Advanced Photon Source Orbit Feedback using X-ray Beam Position Monitoring at the Advanced Photon Source

2001-12-14

arxiv.org/abs/physics/0112043v1

eConf C011127:WECI001,2001

Physics

Instrumentation and Detectors

Invited talk WECI001 at ICALEPCS'01, San Jose, CA 4 pages, 3 figures

Scientific paper

The Advanced Photon Source (APS) was commissioned in 1995 as a third-generation x-ray user facility. At that time orbit control was performed exclusively with broadband rf beam position monitors (BPMs). Since then, emphasis has been placed on incorporating x-ray beam position monitors into the orbit control algorithms. This has resulted in an order of magnitude improvement in long-term beam stability vertically, using x-ray BPMs (X-BPMs) on bending magnet beamlines. Additional processing will allow similar improvements horizontally, once systematic effects associated with variable insertion device (ID) x-ray beams are properly compensated. Progress to date and upgrade plans will be presented, with an emphasis on the details of the required digital signal processing.

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