COUPLING MEASUREMENT AND CORRECTION AT RHIC.

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Coupling correction at RHIC has been operationally achieved through a two-step process: using local triplet skew quadrupoles to compensate coupling corn rolled low-beta triplet quadrupoles, and minimizing the tune separation and residual coupling with orthogonal global skew quadrupole families. An application has been developed for global correction that allows skew quadrupole tuning and tune display with a choice of different tune measurement techniques, including tune-meter, Schottky and phase lock loop (PLL). Coupling effects have been analysed by using 1024-turn (TBT) information from the beam position monitor (BPM) system. These data allow the reconstruction of the off-diagonal terms of the transfer ... continued below

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3 pages

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PILAT,F.; BEEBE-WANG,J.; FISCHER,W.; PTITSYN,V. & SATOGATA,T. June 2, 2002.

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Description

Coupling correction at RHIC has been operationally achieved through a two-step process: using local triplet skew quadrupoles to compensate coupling corn rolled low-beta triplet quadrupoles, and minimizing the tune separation and residual coupling with orthogonal global skew quadrupole families. An application has been developed for global correction that allows skew quadrupole tuning and tune display with a choice of different tune measurement techniques, including tune-meter, Schottky and phase lock loop (PLL). Coupling effects have been analysed by using 1024-turn (TBT) information from the beam position monitor (BPM) system. These data allow the reconstruction of the off-diagonal terms of the transfer matrix, a measure of global coupling. At both injection and storage energies, coordination of tune meter kicks with TBT acquisition at 322 BPM's in each ring allows the measurement of local coupling at all BPM locations.

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3 pages

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  • 2002 PARTICLE ACCELERATOR CONFERENCE, PARIS (FR), 06/02/2002--06/07/2002

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  • Report No.: BNL--69223
  • Grant Number: AC02-98CH10886
  • Office of Scientific & Technical Information Report Number: 798561
  • Archival Resource Key: ark:/67531/metadc741860

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  • June 2, 2002

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  • Oct. 19, 2015, 7:39 p.m.

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  • Nov. 9, 2015, 9:39 p.m.

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PILAT,F.; BEEBE-WANG,J.; FISCHER,W.; PTITSYN,V. & SATOGATA,T. COUPLING MEASUREMENT AND CORRECTION AT RHIC., article, June 2, 2002; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc741860/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.