Abstract
The Accelerator Test Facility 2 (ATF2) is a scaled demonstrator system for final focus beam lines of linear high energy colliders. This paper describes the high resolution cavity beam position monitor (BPM) system, which is a part of the ATF2 diagnostics. Two types of cavity BPMs are used, -band operating at 6.423 GHz, and -band at 2.888 GHz with an increased beam aperture. The cavities, electronics, and digital processing are described. The resolution of the -band system with attenuators was determined to be approximately 250 nm and for the -band system. Without attenuation the best recorded -band cavity resolution was 27 nm.
15 More- Received 7 October 2011
DOI:https://doi.org/10.1103/PhysRevSTAB.15.042801
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Published by the American Physical Society