Optics Measurements, Corrections and Modeling for High-Performance Storage Rings

Session

Experience from light sources and damping rings

20 Jun 2011, 16:00

6/2-024 - BE Auditorium Meyrin (CERN)

Conveners

Experience from light sources and damping rings

• Dieter Einfeld (cells)

Description

1. Achieved measurement resolution
2. Achieved optics quality (initial starting point and final achievement)
3. Major breakthroughs

64. LOCO Overview

James Safranek (SLAC)

20/06/2011, 16:00

The LOCO (Linear Optics from Closed Orbits) algorithm is used to find and correct errors in the linear optics of storage rings. This technique has been used to correct the optics of many storage rings. I will give examples of using LOCO to correct beta functions and dispersion, correct coupling, measure impedance, and correct transport line optics. I will describe constrained fitting, which...

21. Linear lattice errors at the ESRF, measurement and correction

Dr Thomas Perron (ESRF)

20/06/2011, 16:20

ESRF machine modeling based on beam orbit measurements will be reviewed. Beta beating, coupling and vertical dispersion are corrected from this model. The minimization of the coupling resonance driving terms (RDT) allowed to reduce vertical emittance to record low values for the ESRF. Vertical dispersion then becomes a key parameter for any further reduction of vertical emittance: Its links to...

27. SLS Experience

Masamitsu Aiba (Unknown)

20/06/2011, 16:40

SLS storage ring optics reaches the state-of-the-art through more than ten years operation as providing high quality synchrotron light to about 20 beam lines. The linear optics has been measured with the response of the tune to small variation of quadrupole strength and corrected based on SVD. The corrected optics allows us to employ the model response matrix for the orbit correction/feedback...

28. SOLEIL Experience

Laurent Nadolski (SOLEIL)

20/06/2011, 17:00

The SOLEIL 2.75 GeV third generation synchrotron light source has been delivering photon beam to users since January 2007. The storage ring optics is based on a DBA lattice, very compact and strongly focusing to accommodate a 3.7 nm.rad horizontal emittance and a 1020 ph/s/mm2/mrad2/0.1*BW brilliance for a 354 m circumference storage ring. As of today 24 beam-lines are provided with a top-up...

29. DIAMOND Experience

riccardo bartolini (Diamond Light Source and John Adams Institute)

20/06/2011, 17:20

The beta beating at the diamond storage ring has been reduced to less than 1% peak-to-peak and the linear coupling to 8e-4 at the source point, providing a vertical emittance of about 2pm. Building upon this excellent control of the linear optics, we have developed various techniques for the calibration of the nonlinear model of the storage ring. Experimental results based on FMA and driving...