Vacuum ultraviolet coherent undulator radiation from attosecond electron bunches

Enrico Brunetti, Bas Van Der Geer, Marieke De Loos, Kay Dewhurst, Andrzej Kornaszewski, Antoine Maitrallain, Bruno Muratori, Hywel Owen, Mark Wiggins, Dino A. Jaroszynski

Research output: Contribution to journalArticlepeer-review


Attosecond duration relativistic electron bunches travelling through an undulator can generate brilliant coherent radiation in the visible to vacuum ultraviolet spectral range. We present comprehensive numerical simulations to study the properties of coherent emission for a wide range of electron energies and bunch durations, including space-charge effects. These demonstrate that electron bunches with r.m.s. duration of 50 as, nominal charge of 0.1 pC and energy range of 100-250 MeV produce [Formula: see text] coherent photons per pulse in the 100-600 nm wavelength range. We show that this can be enhanced substantially by self-compressing negatively chirped 100 pC bunches in the undulator to produce [Formula: see text] coherent photons with pulse duration of 0.5-3 fs.

Original languageEnglish
Article number14595
Number of pages25
JournalNature Scientific Reports
Issue number1
Publication statusPublished - 16 Jul 2021


  • VUV
  • ultraviolet radiation
  • visible light
  • coherent radiation
  • Radiation
  • attosecond
  • electron
  • undulator
  • undulator radiation
  • bunch chirp


Dive into the research topics of 'Vacuum ultraviolet coherent undulator radiation from attosecond electron bunches'. Together they form a unique fingerprint.

Cite this