17–22 May 2026
C.I.D
Europe/Zurich timezone

Comparison of numerical methods to determine quadrupole centres for beam based alignment

THP2017
21 May 2026, 16:00
2h
C.I.D

C.I.D

Deauville, France
Poster Presentation MC2.A04: Photon sources: Circular Accelerators Poster session

Speaker

Richard Fielder (Diamond Light Source)

Description

A beam based alignment procedure is used to realign the beam to the centers of the quadrupoles, which can be achieved by the calibration of BPM offsets and orbit corrections. Accurately determining quadrupole centers is an important step that requires analyzing BPM data collected while modulating the nearby quadrupole and one or more corrector magnets in the ring. In this paper, some numerical methods to extract the quadrupole centers based on error analysis are presented. Their results are compared to methods without error analysis. This study is based on the online experiments at Diamond and simulations for Diamond-II.

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Author

Hung-Chun Chao (Diamond Light Source)

Co-authors

Ian Martin (Diamond Light Source) Richard Fielder (Diamond Light Source)

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