A Fast Optics Correction for the Diamond Storage Ring

Authors: I. P. S. Martin (Diamond Light Source) , M. Abbott (Diamond Light Source) , M. Furseman (Diamond Light Source) , G. Rehm (Diamond Light Source) , R. Bartolini (Diamond Light Source; University of Oxford)
Co-authored by industrial partner: No

Type: Conference Paper
Conference: IPAC14
Peer Reviewed: No

State: Published (Approved)
Published: May 2014

Abstract: Since March 2013, the Diamond storage ring has been operated with a target vertical emittance of 8 pm.rad. This condition is achieved by first applying a LOCO* optics correction with IDs set to their typical gaps, then offsetting the skew quadrupole magnets in order to increase the vertical emittance again to the desired value. Whilst a feedback application** is able to stabilise the vertical emittance during ID gap and phase changes in the short to medium term, regular applications of LOCO are still required to maintain good coupling control in the longer term. In this paper we describe measures taken to speed up the optics correction procedure, including a fast orbit response matrix measurement, a reduction of the number of magnets used to measure the data, and a distribution of the LOCO calculations to run in parallel.

Subject Areas: Technique Development

Technical Areas: Optics

Added On: 13/03/2017 10:23

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