Optics solutions for pp operation with electron lenses at 100 GeV

White, S. M.; Fischer, W.; Luo, Y.

doi:10.2172/1149125

Cited by 5 publications

(5 citation statements)

References 8 publications

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“…Achromatic telescope squeezing (ATS) [34] optics for RHIC Previous studies showed that as long as the lattice tune is not in the proximity of a low order betatron resonance, the colliding proton beam lifetime is limited by the beam-beam interaction and the off-momentum dynamic aperture [22]. In the process of developing a new lattice, a dedicated effort was made to also minimize the nonlinear chromaticity in order to provide for an increased off-momentum dynamic aperture [35].…”

Section: Lattice Design and Verificationmentioning

confidence: 99%

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Compensation of head-on beam-beam induced resonance driving terms and tune spread in the Relativistic Heavy Ion Collider

Fischer

Drees

et al. 2017

Phys. Rev. Accel. Beams

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A head-on beam-beam compensation scheme was implemented for operation in the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory [Phys. Rev. Lett. 115, 264801 (2015)]. The compensation consists of electron lenses for the reduction of the beam-beam induced tune spread, and a lattice for the minimization of beam-beam generated resonance driving terms. We describe the implementations of the lattice and electron lenses, and report on measurements of lattice properties and the effect of the electron lenses on the hadron beam.

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Section: Lattice Design and Verificationmentioning

confidence: 99%

“…The 90°F ODO lattice required an increase in the integer tune by one unit in both planes and as a consequence a new injection optics was produced involving new power supplies. Details of the design study can be found in [35]. Figure 5 shows the ATS lattice for the RHIC Blue ring.…”

Section: Lattice Design and Verificationmentioning

confidence: 99%

Compensation of head-on beam-beam induced resonance driving terms and tune spread in the Relativistic Heavy Ion Collider

Fischer

Drees

et al. 2017

Phys. Rev. Accel. Beams

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“…For 100 GeV p-p run in 2015, a new lattice [14] was designed with a multiple of 180 degrees phase advance from e-lens [15] to IP8. Even though it was not necessary to compensate beam-beam using e-lens, the same lattice was used in the proton ring for p-Au/Al run because better dynamic aperture performance demonstrated during p-p run.…”

Section: Latticementioning

confidence: 99%

RHIC operation with asymmetric collisions in 2015

Liu

Aschenauer

Атоян

et al. 2015

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To study low-x shadowing/saturation physics as well as other nuclear effects [1, 2], proton-gold (p-Au, for 5 weeks) and proton-Aluminum (p-Al, for 2 weeks) collisions were provided for experiments in 2015 at the Relativistic Heavy Ion Collider (RHIC), with polarized proton beam in the Blue ring and Au/Al beam in the Yellow ring. The special features of the asymmetric run in 2015 will be introduced. The operation experience will be reviewed as well in the report.

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“…In addition, the DX magnet shifts planned for 2015 cause significantly altered local orbits in the insertion areas. This in combination with a 90 degree F0D0 cell phase advance lattice needed for the ATS scheme (achromatic telescopic squeeze [2]) adds another layer of Figure 5: Loss pattern during a 100 GeV AuAu store (18371) in run 14 with prefire protection bumps in place.…”

Section: Prefire Protection Bumpsmentioning

confidence: 99%