Automated beam based alignment of the ALS quadrupoles

Portmann, G.; Robin, D.; Schachinger, L.

doi:10.1109/pac.1995.505662

Cited by 17 publications

(14 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(2) and those of Eqs. (6) and (8) from the dual-frequency case. The two final offsets agree roughly: 32 AE 4 μm from the single-frequency excitation and 29 AE 2 μm from the dual-plane modulation.…”

Section: Fig 4 Top Plot: Correlation Between Twomentioning

confidence: 99%

See 1 more Smart Citation

Fast beam-based alignment using ac excitations

Martí

Benedetti

Iriso

et al. 2020

Phys. Rev. Accel. Beams

View full text Add to dashboard Cite

Standard quadrupole beam-based alignment (BBA) techniques rely on orbit data and on the sequential variation of quadrupole and orbit corrector magnets (OCM). This results in time-consuming measurements of the order of several hours in most circular accelerators. Fast (10 kHz) beam position monitors (BPM) and OCMs with ac power supplies are routinely used in modern synchrotron light sources to drive fast orbit feedback systems. In this paper we show how they can be employed also to dramatically reduce the time for any quadrupole BBA to several minutes only, ensuring the same level of accuracy and precision. Moreover, conversely to the standard BBA, the new procedure accounts automatically for any level of betatron coupling, BPM roll and OCM tilt. In the case of the ALBA 3rd generation light source, the time for a complete measurement dropped from 5 hours to 10 minutes, a reduction by a factor 30. As further extension of this novel approach, an even faster skew quadrupole BBA was demonstrated in ALBA for the first time, taking advantage of the additional ac modulation of the skew quadrupole field. Results from this fully ac measurement are compared with those obtained via a traditional dc scan of the skew quadrupole.

show abstract

Section: Fig 4 Top Plot: Correlation Between Twomentioning

confidence: 99%

“…In the first, the observable is the offset between beam trajectory and quadrupole axis [1][2][3][4]. In the second, the observable is the beam position at the BPM when it passes through the axis of the closest quadrupole [5][6][7][8]. The first technique is known as beam-toquad while the second is referred to as BPM-to-quad.…”

Section: Introductionmentioning

confidence: 99%

Fast beam-based alignment using ac excitations

Martí

Benedetti

Iriso

et al. 2020

Phys. Rev. Accel. Beams

View full text Add to dashboard Cite

show abstract

“…The beam based alignment (BBA) routine for stored beam is not yet implemented in SC. However, successful routine operation at the ALS [26] indicates that performing BBA at the ALS-U AR after achieving beam capture will be straight forward. Based on measurements at ALS we proceed by conservatively crediting BBA for a reduction of BPM offsets to 50 μm rms.…”

Section: F Beam Based Alignmentmentioning

confidence: 99%

Toolkit for simulated commissioning of storage-ring light sources and application to the advanced light source upgrade accumulator

Hellert

Amstutz

Steier

et al. 2019

Phys. Rev. Accel. Beams

View full text Add to dashboard Cite

We present a new accelerator toolbox (AT)-based toolkit for simulating the commissioning of lightsource storage rings. The toolkit provides a framework for supporting high-level scripts to represent with realism the various procedures (e.g., orbit and optics correction, beam-based alignment, etc.) encountered during commissioning and is designed to mirror as closely as possible the reality as seen from the control room. Emphasis is placed on the inclusion of a comprehensive set of error sources and faithful modeling of beam diagnostics. The toolkit capabilities are demonstrated in an application to the recent design and commissioning studies of the Advanced Light Source Upgrade (ALS-U) Accumulator Ring, a short-time successful commissioning of which will be critical to the overall ALS-U project success.

show abstract

“…It can be further improved by using automated quad centering, e.g. by using the algorithm developed for the ALS [21]; which we have ported to and tested at the NSLS X-Ray Ring [22]. The magnet alignment tolerances are summarized in Tab.…”

Section: Appendix A: Summary Of Engineering Tolerancesmentioning

confidence: 99%

NSLS-II Control of Dynamic Aperture

Bengtsson¹

2008

View full text Add to dashboard Cite

Automated beam based alignment of the ALS quadrupoles

Cited by 17 publications

References 2 publications

Fast beam-based alignment using ac excitations

Fast beam-based alignment using ac excitations

Toolkit for simulated commissioning of storage-ring light sources and application to the advanced light source upgrade accumulator

NSLS-II Control of Dynamic Aperture

Contact Info

Product

Resources

About