Correction of Skew-Quadrupole Errors in RHIC

Technical Report · Wed May 01 00:00:00 EDT 1991

DOI:https://doi.org/10.2172/1119350· OSTI ID:1119350

Dell, G. F. ^[1]; Hahn, H. ^[1]; Lee, S. Y. ^[1]; Parzen, G. ^[1]; Tepikian, S. ^[1]

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

The correction scheme for skew-quadrupole (α₁) errors in the Relativistic Heavy Ion Collider is presented. The α₁ errors result from fabrication and from installation errors. At the selected betatron tune of v_x = 28.826 and v_y = 28.820, the principal resonances driven by α₁ errors are v_x-v_y = 0, the sum resonances near v_x+v_y which cause residual tune splitting and distortion of beta function, and v_y = 28&29 which cause vertical dispersion. Skew quadrupole correctors located in the insertions and arcs will be used to correct the coupling and sum resonances and, if required, separate correctors in the arcs could be used for vertical dispersion correction. The study of the α₁ correction system confirmed that correction is possible at β* = 2 m and β* = 6 m and that the required corrector strengths are consistent with those specified for RHIC.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-98CH10886; AC02-76CH00016
• OSTI ID: 1119350
• Report Number(s): BNL-102008-2013-IR
• Country of Publication: United States
• Language: English

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