Steady-state description of an ion channel free-electron laser with varying betatron amplitude

Bernhard Ersfeld, Rodolfo Bonifacio, Sijia Chen, Mohammad Islam, Dino Jaroszynski

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


The ion-channel laser (ICL) has been proposed as an alternative to the free-electron laser (FEL), replacing the deflection of electrons in an undulator by betatron oscillations in an ion channel. The aim of this study is to describe the ICL in terms of the well-developed formalism for the FEL in the steady-state, while taking into account the dependence of the resonance between oscillations and emitted field on the oscillation amplitude. Numerical solutions for experimentally relevant parameters show similarities and differences between both devices. The ICL has potential to replace FELs based on magnetic undulators, leading to very compact coherent X-ray sources. Furthermore, coupling the ICL with a laser plasma wakefield accelerator would reduce the size of a coherent light sources by several orders of magnitude.
Original languageEnglish
Title of host publicationHarnessing relativistic plasma waves as novel radiation sources from terhertz to x-rays and beyond II
EditorsD.A. Jaroszynski
Place of PublicationBellingham
Publication statusPublished - 2011
EventHarnessing Relativistic Plasma Waves as Novel Radiation Sources from Terahertz to X-Rays and Beyond II - Prague, Czech Republic
Duration: 20 Apr 201121 Apr 2011

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X


ConferenceHarnessing Relativistic Plasma Waves as Novel Radiation Sources from Terahertz to X-Rays and Beyond II
CountryCzech Republic


  • steady-state description
  • ion channel
  • free-electron laser
  • betatron amplitude
  • coherent X-ray source
  • betatron oscillations

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