Determination of longitudinal bunch profile using spectral fluctuations of incoherent radiation

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Single-shot spectrum measurements of the radiation emitted by an electron bunch provide a novel way to characterize the bunch shape. Shot noise fluctuations in the longitudinal beam density result in radiation with a spectrum that consists of spikes with width inversely proportional to the bunch length. The variance of the Fourier transform of the spectrum is proportional to the convolution function of the beam current averaged over many bunches. After the convolution function is found, the phase retrieval technique can be applied to recover the bunch shape. This technique has been used to analyze the shape of the 4-ps-long bunches ... continued below

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3 p.

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Sajaev, V. July 5, 2000.

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Single-shot spectrum measurements of the radiation emitted by an electron bunch provide a novel way to characterize the bunch shape. Shot noise fluctuations in the longitudinal beam density result in radiation with a spectrum that consists of spikes with width inversely proportional to the bunch length. The variance of the Fourier transform of the spectrum is proportional to the convolution function of the beam current averaged over many bunches. After the convolution function is found, the phase retrieval technique can be applied to recover the bunch shape. This technique has been used to analyze the shape of the 4-ps-long bunches at the Low-Energy Undulator Test Line at the Advanced Photon Source.

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3 p.

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INIS; OSTI as DE00759054

Medium: P; Size: 3 pages

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  • 7th European Particle Accelerator Conference (EPAC '2000), Vienna (AT), 06/26/2000--06/30/2000

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  • Report No.: ANL/ASD/CP-100935
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 759054
  • Archival Resource Key: ark:/67531/metadc708204

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Office of Scientific & Technical Information Technical Reports

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  • July 5, 2000

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 10, 2017, 7:21 p.m.

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Sajaev, V. Determination of longitudinal bunch profile using spectral fluctuations of incoherent radiation, article, July 5, 2000; Illinois. (digital.library.unt.edu/ark:/67531/metadc708204/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.