Calculation of the Beam Field in the LCLS Bunch Length Monitor

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Maintaining a stable bunch length and peak current is a critical step for the reliable operation of a SASE based x-ray source. In the LCLS, relative bunch length monitors (BLM) right after both bunch compressors are proposed based on the coherent radiation generated by the short electron bunch. Due to its diagnostic setup, the standard far field synchrotron radiation formula and well-developed numerical codes do not apply for the analysis of the BLM performance. In this paper, we develop a calculation procedure to take into account the near field effect, the effect of a short bending magnet, and the diffraction ... continued below

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11 pages

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Stupakov, G.; Ding, Y.; Huang, Z. & /SLAC June 7, 2006.

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Description

Maintaining a stable bunch length and peak current is a critical step for the reliable operation of a SASE based x-ray source. In the LCLS, relative bunch length monitors (BLM) right after both bunch compressors are proposed based on the coherent radiation generated by the short electron bunch. Due to its diagnostic setup, the standard far field synchrotron radiation formula and well-developed numerical codes do not apply for the analysis of the BLM performance. In this paper, we develop a calculation procedure to take into account the near field effect, the effect of a short bending magnet, and the diffraction effect of the radiation transport optics. We find the frequency response of the BLM after the first LCLS bunch compressor and discuss its expected performance.

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11 pages

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  • Report No.: SLAC-PUB-11890
  • Grant Number: AC02-76SF00515
  • DOI: 10.2172/883262 | External Link
  • Office of Scientific & Technical Information Report Number: 883262
  • Archival Resource Key: ark:/67531/metadc891977

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Creation Date

  • June 7, 2006

Added to The UNT Digital Library

  • Sept. 23, 2016, 2:42 p.m.

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  • Nov. 22, 2016, 9:50 p.m.

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Stupakov, G.; Ding, Y.; Huang, Z. & /SLAC. Calculation of the Beam Field in the LCLS Bunch Length Monitor, report, June 7, 2006; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc891977/: accessed September 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.