Plasma accelerator driven coherent spontaneous emission

B. M. Alotaibi, R. Altuijri, A. F. Habib, B. Hidding, B. W. J. McNeil, P. Traczykowski

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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Plasma accelerators [1] are a potentially important source of high energy, low emittance electron beams with high peak currents and generated within a relatively short distance. While novel plasma photocathodes [2] may offer improvement to the normalised emittance and brightness of electron beams compared to Radio Frequency-driven accelerators, a challenge is the energy spread and chirp of the beams, which can make FEL operation impossible. In this paper it is shown that such an energy-chirped beam, with a dynamically evolving current profile due to ballistic bunching, can generate significant coherent radiation output via the process of Coherent Spontaneous Emission (CSE) [3]. While this CSE is seen to cause some FEL-induced electron bunching at the radiation wavelength, the dynamic evolution of the energy chirped pulse dampens out any high-gain FEL interaction.

Original languageEnglish
Title of host publicationProceedings of the 39th International Free-Electron Laser Conference, FEL 2019
Place of PublicationGeneva
Number of pages4
ISBN (Electronic)9783954502103
Publication statusPublished - 26 Aug 2019
Event39th International Free-Electron Laser Conference, FEL 2019 - Hamburg, Germany
Duration: 26 Aug 201930 Aug 2019

Publication series

NameProceedings of the 39th International Free-Electron Laser Conference, FEL 2019


Conference39th International Free-Electron Laser Conference, FEL 2019


  • plasma accelerators
  • high energy physics
  • Coherent Spontaneous Emission (CSE)
  • free electron lasers


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