Lattice design for the High Energy Ring of the SLAC B-Factory (PEP-II)

Donald, M.; Cai, Yunhai; Irwin, J.; Nosochkov, Y.; Ritson, D. M.; Seeman, J.; Wienands, H. -U.; Yan, Yunxiang

doi:10.1109/pac.1995.504729

Cited by 8 publications

(4 citation statements)

References 4 publications

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“…As a consequence of this requirement, chromatic correction for strong quadrupoles near the IP become critical to minimize non-linear chromaticity and retain an adequate dynamic aperture. Many of the major revisions of the lattices [2] [3] resulted from the improvement of the schemes for chromatic corrections.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Aperture Improvement of PEP-II Lattices Using Resonance Basis Lie Generators

Yan¹

2003

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To simplify the engineering efforts of implementing the PEP-II lattices, many modifications have been made to these lattices since the conceptual design report [1]. During the development and evolution of the lattices, changes in a lattice would often result in a significant reduction in the dynamic aperture. At such times, we often relied on a non-linear analysis using the one-turn resonance basis Lie generator to identify the cause of the degradation. In this paper, we will present such examples to facilitate the usage of map for diagnosing the problems in lattice design.

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Section: Introductionmentioning

confidence: 99%

Dynamic Aperture Improvement of PEP-II Lattices Using Resonance Basis Lie Generators

Yan¹

2003

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“…The magnet lattice of the ring is six-fold symmetric to fit the existing tunnel and has been described before [3]. The nominal beta function at the insertion point, β y *, is 2 cm; the lattice and the insertion quads support β y * as low as 1 cm.…”

Section: Introductionmentioning

confidence: 99%

Status of the PEP-II B-Factory High Energy Ring

Wienands¹,

Reuter²,

Bellomo³

et al. 2003

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The 9 GeV High Energy Ring (HER) of the PEP-II B Factory is an electron storage ring under construction at SLAC. Significant progress has been made in the last year on all systems. As of mid 1996, all 192 dipoles have been installed, with installation of the quadrupoles underway. The vacuum system, for design currents up to 3 A average, is in production using a recently commissioned e-beam welder. Beam instrumentation systems are being fabricated. The interaction region will bring the HER beam into collision with the 3 GeV beam of the Low Energy Ring; design of this section of the HER is in an advanced stage.

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“…The new design was aimed at reducing the number of magnets in the IR. The adopted solution was to move the local ysextupoles from the IR to the beginning of adjacent arcs, as in the HER chromatic correction scheme [7]. This al lowed to remove one -1 section from the IR.…”

Section: A Interaction Region and Adjacent Arcsmentioning

confidence: 99%

Low Energy Ring lattice of the PEP-II asymmetric B-factory

Cai

Donald

Helm

et al.

Proceedings Particle Accelerator Conference

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Developing a lattice that contains a very low beta value at the interaction point (IP) and has adequate dy namic aperture ia one of the major challenges in design ing the PEP-II asymmetric B-factory. For the Low En ergy Ring (LER) we have studied several different chro matic correction schemes since the conceptual design report (CDR) [1], Based on these studies, a hybrid solution with local and semi-local chromatic sextupoles has been selected as the new baseline lattice to replace the local scheme in the CDR [2]. The new design simplifies the interaction re gion (IR) and reduces the number of sextupoles in the arcs. Arc sextupoles are paired at IT phase difference and are not interleaved. In this paper we describe the baseline lattice with the emphasis on the lattice changes made since the CDR.

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Lattice design for the High Energy Ring of the SLAC B-Factory (PEP-II)

Cited by 8 publications

References 4 publications

Dynamic Aperture Improvement of PEP-II Lattices Using Resonance Basis Lie Generators

Dynamic Aperture Improvement of PEP-II Lattices Using Resonance Basis Lie Generators

Status of the PEP-II B-Factory High Energy Ring

Low Energy Ring lattice of the PEP-II asymmetric B-factory

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