The correction of linear lattice gradient errors using an AC dipole

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Precise measurement of optics from coherent betatron oscillations driven by ac dipoles have been demonstrated at RHIC and the Tevatron. For RHIC, the observed rms beta-beat is about 10%. Reduction of beta-beating is an essential component of performance optimization at high energy colliders. A scheme of optics correction was developed and tested in the RHIC 2008 run, using ac dipole optics for measurement and a few adjustable trim quadruples for correction. In this scheme, we first calculate the phase response matrix from the. measured phase advance, and then apply singular value decomposition (SVD) algorithm to the phase response matrix to ... continued below

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Wang,G.; Bai, M.; Litvinenko, V.N. & Satogata, T. May 4, 2009.

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Precise measurement of optics from coherent betatron oscillations driven by ac dipoles have been demonstrated at RHIC and the Tevatron. For RHIC, the observed rms beta-beat is about 10%. Reduction of beta-beating is an essential component of performance optimization at high energy colliders. A scheme of optics correction was developed and tested in the RHIC 2008 run, using ac dipole optics for measurement and a few adjustable trim quadruples for correction. In this scheme, we first calculate the phase response matrix from the. measured phase advance, and then apply singular value decomposition (SVD) algorithm to the phase response matrix to find correction quadruple strengths. We present both simulation and some preliminary experimental results of this correction.

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  • Particle Accelerator Conference (PAC09); Vancouver, B.C., Canada; 20090504 through 20090508

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  • Report No.: BNL--81862-2009-CP
  • Grant Number: DE-AC02-98CH10886
  • Office of Scientific & Technical Information Report Number: 961819
  • Archival Resource Key: ark:/67531/metadc927348

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Office of Scientific & Technical Information Technical Reports

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  • May 4, 2009

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 8:30 p.m.

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Wang,G.; Bai, M.; Litvinenko, V.N. & Satogata, T. The correction of linear lattice gradient errors using an AC dipole, article, May 4, 2009; United States. (digital.library.unt.edu/ark:/67531/metadc927348/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.