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.
@article{arxiv.physics/0112043,
title = {Orbit Feedback using X-ray Beam Position Monitoring at the Advanced Photon Source},
author = {Glenn Decker and Om Singh},
journal= {arXiv preprint arXiv:physics/0112043},
year = {2010}
}
Comments
Invited talk WECI001 at ICALEPCS'01, San Jose, CA 4 pages, 3 figures