Compact 400-Mhz Half-Wave Spoke Resonator Crab Cavitiy for the LHC Update

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Crab cavities are proposed for the LHC upgrade to improve the luminosity. There are two possible crab cavity installations for the LHC upgrade: the global scheme at Interaction Region (IR) 4 where the beam-beam separation is about 420-mm, and the local scheme at the IR5 where the beam-beam separation is only 194-mm. One of the design requirements as the result of a recent LHC-Crab cavity workshop is to develop a 400-MHz cavity design that can be utilized for either the global or local schemes at IR4 or IR5. Such a design would offer more flexibility for the final upgrade installation, ... continued below

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3 pages

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Li, Zenghai; Xiao, Liling; Ng, Cho; Markiewicz, Thomas & /SLAC August 26, 2010.

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Crab cavities are proposed for the LHC upgrade to improve the luminosity. There are two possible crab cavity installations for the LHC upgrade: the global scheme at Interaction Region (IR) 4 where the beam-beam separation is about 420-mm, and the local scheme at the IR5 where the beam-beam separation is only 194-mm. One of the design requirements as the result of a recent LHC-Crab cavity workshop is to develop a 400-MHz cavity design that can be utilized for either the global or local schemes at IR4 or IR5. Such a design would offer more flexibility for the final upgrade installation, as the final crabbing scheme is yet to be determined, and save R&D cost. The cavity size of such a design, however, is limited by the beam-beam separation at IR5 which can only accommodate a cavity with a horizontal size of about 145-mm, which is a design challenge for a 400-MHz cavity. To meet the new design requirements, we have developed a compact 400-MHz half-wave spoke resonator (HWSR) crab cavity that can fit into the tight spaces available at either IR4 or IR5. In this paper, we present the optimization of the HWSR cavity shape and the design of HOM, LOM, and SOM couplers for wakefield damping.

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3 pages

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  • Contributed to 1st International Particle Accelerator Conference: IPAC'10, Kyoto, Japan, 23-28 May 2010

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  • Report No.: SLAC-PUB-14163
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 992960
  • Archival Resource Key: ark:/67531/metadc1013478

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • August 26, 2010

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  • Oct. 14, 2017, 8:36 a.m.

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  • Nov. 2, 2017, 7:31 p.m.

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Li, Zenghai; Xiao, Liling; Ng, Cho; Markiewicz, Thomas & /SLAC. Compact 400-Mhz Half-Wave Spoke Resonator Crab Cavitiy for the LHC Update, article, August 26, 2010; [California]. (digital.library.unt.edu/ark:/67531/metadc1013478/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.