Successful Completion of the Top-off Upgrade of the Advanced Light Source

Steier, C.; Bailey, B.; Baptiste, K.; Barry, W.; Biocca, A.; Byrne, W.; Casey, P.; Chin, Michael; Donahue, R.; Duarte, Robert; Fahmie, M.; Gath, B.; Jacobson, S.; Julian, J.; Jung, Jin‐Young; Kritscher, M.; Kwiatkowski, S.; Marks, S.; McKean, P.; Mueller, R.; Nishimura, Hiroshi; O'Neill, J.; Portmann, G.; Prestemon, S.; Robin, D.; Rossi, S.; Sannibale, F.; Scarvie, T.; Schlueter, R.; Shuman, D.; Smith-Baumann, Alexis; Stover, G.; Timossi, C.; Wan, Weishi; Warwick, Tony; Wells, R.; Weber, J.; Williams, E.

doi:10.1063/1.3463270

Cited by 1 publication

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“…Injection section chambers (Type F magnets): The two categories above cover the replacement of the 46 existing steering correctors but all straight sections have to be provided with sextupole field (total of 48 magnets) [1]. Consequently two special magnets will be fabricated for these specific locations where the vacuum chamber is wide and short along the beam direction.…”

Section: Magnet Yoke Designsmentioning

confidence: 99%

“…The Advanced Light Source (ALS) is planning on increasing the brightness of the photons delivered to the users. After the vertical emittance reduction obtained from the recent successful Top-Off upgrade, the new low emittance upgrade project is expected to reduce the horizontal emittance by about a factor of 3 in the bending magnet beamlines and about a factor of 2 in the undulator beamlines [1]. Different lattice options compatible with horizontal emittance reduction were investigated and lattices close to the nominal lattice were first studied [2].…”

Section: Introductionmentioning

confidence: 99%

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Harmonic sextupoles for the Advanced Light Source low emittance upgrade

Madur

Arbelaez

Marks

et al. 2011

Nuclear Instruments and Methods in Physics Research Section A:

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The Advanced Light Source is a 3rd generation light source in operation since 1993. This light source is providing state of the art performance to more than 40 beamlines and their users thanks to the upgrades that have been completed over the last few years. Higher photon beam brightness is expected to become available to users in the near future through a new upgrade with the introduction of 48 sextupoles in the ALS lattice. Introducing new combined function magnets in an existing storage ring is a challenge due to the limited space available and a balance had to be found between magnet performance and spatial constraints. Moreover, the existing steering magnets will be replaced by the harmonic sextupoles. Therefore predicting the hysteresis behavior of the harmonic sextupole steering functions became critical for those included in the fast-orbit feedback loop (22 of them). After a brief introduction to the motivation for the upgrade and the scope of the project, we develop in this paper the different constraints driving the three required combined function magnet designs as well as their expected performance.

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Section: Magnet Yoke Designsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%