Dynamic X-Y Crosstalk / Aliasing Errors of Multiplexing BPMs

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Description

Multiplexing Beam Position Monitors are widely used for their simplicity and inherent drift cancellation property. These systems successively feed the signals of (typically four) RF pickups through one single detector channel. The beam position is calculated from the demultiplexed base band signal. However, as shown below, transverse beam motion results in positional aliasing errors due to the finite multiplexing frequency. Fast vertical motion, for example, can alias into an apparent, slow horizontal position change.

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3 pages

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Straumann, T. & /SLAC August 9, 2005.

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Description

Multiplexing Beam Position Monitors are widely used for their simplicity and inherent drift cancellation property. These systems successively feed the signals of (typically four) RF pickups through one single detector channel. The beam position is calculated from the demultiplexed base band signal. However, as shown below, transverse beam motion results in positional aliasing errors due to the finite multiplexing frequency. Fast vertical motion, for example, can alias into an apparent, slow horizontal position change.

Physical Description

3 pages

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  • Prepared for 6th European Workshop on Beam Diagnostic and Instrumentation for Particle Accelerators (DIPAC 2003), Mainz, Germany, 5-7 May 2003

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  • Report No.: SLAC-PUB-11401
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 878800
  • Archival Resource Key: ark:/67531/metadc878417

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  • August 9, 2005

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 5, 2016, 2:33 p.m.

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Straumann, T. & /SLAC. Dynamic X-Y Crosstalk / Aliasing Errors of Multiplexing BPMs, article, August 9, 2005; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc878417/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.