High spin flip efficiency at 255GeV for polarized protons in a ring with two full Siberian Snakes

Huang, Haixin; Kewisch, J.; Liu, C.; Marusic, A.; Meng, W.; Meot, F.; Oddo, P.; Ptitsyn, V.; Ranjbar, V.; Roser, T.

doi:10.1103/PhysRevLett.120.264804

Title: High spin flip efficiency at 255GeV for polarized protons in a ring with two full Siberian Snakes

Journal Article · Thu Jun 28 00:00:00 EDT 2018 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.120.264804· OSTI ID:1440356

Huang, Haixin ^[1]; Kewisch, J. ^[1]; Liu, C. ^[1]; Marusic, A. ^[1]; Meng, W. ^[1]; Meot, F. ^[1]; Oddo, P. ^[1]; Ptitsyn, V. ^[1]; Ranjbar, V. ^[1]; Roser, T. ^[1]

Brookhaven National Lab. (BNL), Upton, NY (United States)

In polarized proton collision experiments, it is highly advantageous to flip the spin of each bunch of protons during the stores to reduce the systematic errors . Experiments done at energies less than 2GeV have demonstrated a spin flip efficiency over 99%. At high energy colliders with Siberian Snakes, a single magnet spin flipper does not work because of t he large spin tune spread and the generation of multiple, overlapping resonances. A more sophisticated spin flipper, constructed of 9-dipole magnets was used to flip the spin in Relativistic Heavy Ion Collider(RHIC). Special optics choice was also used to make the spin tune spread very small. A 97% spin flip efficiency was measured both at 24GeV and 255GeV. Lastly, these results show that efficient spin flipping can be achieved at high energies using a 9-magnet spin flipper.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: SC0012704; AC02-98CH10886

OSTI ID:: 1440356

Alternate ID(s):: OSTI ID: 1457585

Report Number(s):: BNL-205736-2018-JAAM; TRN: US1900725

Journal Information:: Physical Review Letters, Vol. 120, Issue 26; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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