Coupling correction and beam dynamics at ultralow vertical emittance in the ALS

Steiert, C.; Robin, D.; Wolski, Andrzej

doi:10.1109/pac.2003.1289865

Cited by 17 publications

(9 citation statements)

References 5 publications

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“…Simulation studies have shown that it may be possible to achieve a vertical emittance close to 1 pm [2]. The Advanced Light Source (ALS) at LBNL has also achieved a vertical emittance of around 5 pm [3]. In this case, the coupling correction was achieved in a reasonably straightforward manner using the optics analysis code LOCO [4] to determine the appropriate strengths of the skew quadrupoles for correcting the local coupling.…”

Section: Introductionmentioning

confidence: 99%

Analysis of KEK-ATF Optics And Coupling Using Orbit Response Matrix Analysis

Wolski¹,

Lbl²,

Nelson³

et al. 2006

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LOCO is a code for analysis of the linear optics in a storage ring based on the closed orbit response to steering magnets. The analysis provides information on focusing errors, BPM gain and rotation errors, and local coupling. Here, we report the results of an application of LOCO to the KEK-ATF. Although the analysis appears to have provided useful information on the optics of the machine, it appears that one of the main aims of the study -to reduce the vertical emittance by correcting the local coupling -was notsuccessful, and we discuss some possible reasons for this.

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Section: Introductionmentioning

confidence: 99%

Analysis of KEK-ATF Optics And Coupling Using Orbit Response Matrix Analysis

Wolski¹,

Lbl²,

Nelson³

et al. 2006

Self Cite

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show abstract

“…This is a challenging target, and requires an improvement in coupling correction by a factor of two over the best results obtained so far [2]. Coupling correction based on Orbit Response Matrix (ORM) analysis has been applied successfully to reduce the vertical emittance in the LBNL-ALS to around 5 pm [3]. Previous attempts to apply the technique in the KEK-ATF met with mixed success [4,5]; simulation studies suggest that the reason for this was an incorrect weighting applied to the vertical dispersion in fitting the lattice model to the measured data.…”

Section: Introductionmentioning

confidence: 99%

Coupling Correction in the KEK-ATF Using Orbit Response Matrix Analysis

Wolski¹,

Ross²,

Woodley³

et al. 2005

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Orbit Response Matrix (ORM) analysis is a technique used to diagnose and correct optics errors in storage rings. We report the results obtained from the use of ORM analysis at the KEK-ATF to reduce the equilibrium vertical emittance. Measurements of the vertical beam size using a laser wire indicate that the vertical emittance was successfully reduced from 12 pm to around 6 pm (at a bunch charge of 7×10 9 particles) using ORM analysis.

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Section: Introductionmentioning

confidence: 99%

Analysis of KEK-ATF Optics and Coupling Using LOCO

Wolski¹

2004

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LOCO is a computer code for analysis of the linear optics in a storage ring based on the closed orbit response to steering magnets. The analysis provides information on focusing errors, BPM gain and rotation errors, and local coupling. Here, we discuss the details of the LOCO implementation at the KEK-ATF Damping Ring and report the initial results. Some of the information obtained, for example on the BPM gain and coupling errors, had not previously been determined. We discuss the possibility of using the data provided by the LOCO analysis to reduce the vertical emittance of the ATF beam. ANALYSIS OF KEK-ATF OPTICS AND COUPLING USING LOCO* AbstractLOCO is a computer code for analysis of the linear optics in a storage ring based on the closed orbit response to steering magnets. The analysis provides information on focusing errors, BPM gain and rotation errors, and local coupling. Here, we discuss the details of the LOCO implementation at the KEK-ATF Damping Ring and report the initial results. Some of the information obtained, for example on the BPM gain and coupling errors, had not previously been determined. We discuss the possibility of using the data provided by the LOCO analysis to reduce the vertical emittance of the ATF beam.

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Coupling correction and beam dynamics at ultralow vertical emittance in the ALS

Cited by 17 publications

References 5 publications

Analysis of KEK-ATF Optics And Coupling Using Orbit Response Matrix Analysis

Analysis of KEK-ATF Optics And Coupling Using Orbit Response Matrix Analysis

Coupling Correction in the KEK-ATF Using Orbit Response Matrix Analysis

Analysis of KEK-ATF Optics and Coupling Using LOCO

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