Cavity BPM with Dipole-Mode-Selective Coupler

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Description

In this paper, we present a novel position sensitive signal pickup scheme for a cavity BPM. The scheme utilizes the H-plane of the waveguide to couple magnetically to the side of the cavity, which results in a selective coupling to the dipole mode and a total rejection of the monopole mode. This scheme greatly simplifies the BPM geometry and relaxes machining tolerances. We will present detailed numerical studies on such a cavity BPM, analyze its resolution limit and tolerance requirements for a nanometer resolution. Finally present the measurement results of a X-band prototype.

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3 pages

Creation Information

Li, Zenghai; Johnson, Ronald; Smith, Stephen R.; /SLAC; Naito, Takashi; /KEK, Tsukuba et al. June 21, 2006.

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Description

In this paper, we present a novel position sensitive signal pickup scheme for a cavity BPM. The scheme utilizes the H-plane of the waveguide to couple magnetically to the side of the cavity, which results in a selective coupling to the dipole mode and a total rejection of the monopole mode. This scheme greatly simplifies the BPM geometry and relaxes machining tolerances. We will present detailed numerical studies on such a cavity BPM, analyze its resolution limit and tolerance requirements for a nanometer resolution. Finally present the measurement results of a X-band prototype.

Physical Description

3 pages

Source

  • Presented at Particle Accelerator Conference (PAC 03), Portland, Oregon, 12-16 May 2003

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  • Report No.: SLAC-PUB-11913
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 884883
  • Archival Resource Key: ark:/67531/metadc876083

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  • June 21, 2006

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 22, 2016, 10:05 p.m.

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Li, Zenghai; Johnson, Ronald; Smith, Stephen R.; /SLAC; Naito, Takashi; /KEK, Tsukuba et al. Cavity BPM with Dipole-Mode-Selective Coupler, article, June 21, 2006; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc876083/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.