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Reconstructing nonlinear plasma wakefields using a generalized temporally encoded spectral shifting analysis

Research output: Contribution to journalArticlepeer-review

Author(s)

  • C. Arran
  • N. H. Matlis
  • R. Walczak
  • S. M. Hooker

Department/unit(s)

Publication details

JournalPhysical Review Accelerators and Beams
DateAccepted/In press - 1 Oct 2018
DatePublished (current) - 12 Oct 2018
Issue number10
Volume21
Number of pages15
Original languageEnglish

Abstract

We generalize the temporally encoded spectral shifting (TESS) analysis for measuring plasma wakefields using spectral interferometry to dissimilar probe pulses of arbitrary spectral profile and to measuring nonlinear wakefields. We demonstrate that the Gaussian approximation used up until now results in a substantial miscalculation of the wakefield amplitude, by a factor of up to two. A method to accurately measure higher amplitude quasilinear and nonlinear wakefields is suggested, using an extension to the TESS procedure, and we place some limits on its accuracy in these regimes. These extensions and improvements to the analysis demonstrate its potential for rapid and accurate on-shot diagnosis of plasma wakefields, even at low plasma densities.

    Research areas

  • physics.acc-ph, physics.plasm-ph

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