Transverse Coherence Properties of the LCLS X-Ray Beam

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Self-amplifying spontaneous radiation free-electron lasers, such as the LCLS or the European X-FEL, rely on the incoherent, spontaneous radiation as the seed for the amplifying process. Though this method overcomes the need for an external seed source one drawback is the incoherence of the effective seed signal. The FEL process allows for a natural growth of the coherence because the radiation phase information is spread out within the bunch due to slippage and diffraction of the radiation field. However, at short wavelengths this spreading is not sufficient to achieve complete coherence. In this presentation we report on the results of ... continued below

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4 pages

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Reiche, S. April 16, 2007.

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Self-amplifying spontaneous radiation free-electron lasers, such as the LCLS or the European X-FEL, rely on the incoherent, spontaneous radiation as the seed for the amplifying process. Though this method overcomes the need for an external seed source one drawback is the incoherence of the effective seed signal. The FEL process allows for a natural growth of the coherence because the radiation phase information is spread out within the bunch due to slippage and diffraction of the radiation field. However, at short wavelengths this spreading is not sufficient to achieve complete coherence. In this presentation we report on the results of numerical simulations of the LCLS X-ray FEL. From the obtained radiation field distribution the coherence properties are extracted to help to characterize the FEL as a light source.

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4 pages

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  • Prepared for 28th International Free Electron Laser Conference (FEL 2006), Berlin, Germany, 27 Aug - 1 Sep 2006

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  • Report No.: SLAC-PUB-12456
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 902501
  • Archival Resource Key: ark:/67531/metadc883780

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  • April 16, 2007

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  • Sept. 22, 2016, 2:13 a.m.

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  • Sept. 26, 2017, 1:19 p.m.

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Reiche, S. Transverse Coherence Properties of the LCLS X-Ray Beam, article, April 16, 2007; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc883780/: accessed May 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.