Electron Signal Detection for the Beam-Finder Wire of the Linac Coherent Light Source Undulator

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The Linac Coherent Light Source (LCLS) is a SASE x-ray Free-Electron Laser (FEL) based on the final kilometer of the Stanford Linear Accelerator. The tight tolerances for positioning the electron beam close to the undulator axis calls for the introduction of Beam Finder Wire (BFW) device. A BFW device close to the upstream end of the undulator segment and a quadrupole close to the down stream end of the undulator segment will allow a beam-based undulator segment alignment. Based on the scattering of the electrons on the BFW, we can detect the electron signal in the main dump bends after ... continued below

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3 pages

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Wu, Juhao; Emma, P.; Field, R.C. & /SLAC September 21, 2006.

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Description

The Linac Coherent Light Source (LCLS) is a SASE x-ray Free-Electron Laser (FEL) based on the final kilometer of the Stanford Linear Accelerator. The tight tolerances for positioning the electron beam close to the undulator axis calls for the introduction of Beam Finder Wire (BFW) device. A BFW device close to the upstream end of the undulator segment and a quadrupole close to the down stream end of the undulator segment will allow a beam-based undulator segment alignment. Based on the scattering of the electrons on the BFW, we can detect the electron signal in the main dump bends after the undulator to find the beam position. We propose to use a threshold Cherenkov counter for this purpose. According to the signal strength at such a Cherenkov counter, we then suggest choice of material and size for such a BFW device in the undulator.

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3 pages

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  • Contributed to 2006 Linear Accelerator Conference (LINAC 06), Knoxville, Tennessee, 21-25 Aug 2006

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  • Report No.: SLAC-PUB-12120
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 891835
  • Archival Resource Key: ark:/67531/metadc883286

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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.

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  • September 21, 2006

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 5, 2016, 2:49 p.m.

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Wu, Juhao; Emma, P.; Field, R.C. & /SLAC. Electron Signal Detection for the Beam-Finder Wire of the Linac Coherent Light Source Undulator, article, September 21, 2006; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc883286/: accessed September 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.