Generation of electron high energy beams with a ring-like structure by a dual stage laser wakefield accelerator

R. Spesyvtsev, E. Brunetti, G. Vieux, M. Shahzad, A. Maitrallain, S. Yoffe, B. Ersfeld, A. Kornaszewski, M. J. V. Streeter, O. Finlay, Y. Ma, B. Kettle, S.J.D. Dann, F. Albert, Nicola Bourgeois, S. Cipiccia, J.M. Cole, E. Gerstmayr, I.G. González, A. HigginbothamA.E. Hussein, K. Falk, K. Krushelnick, N.C. Lemos, N.C. Lopes, C. Lumsdon, O. Lundh, S. P. D. Mangles, Z. Najmudin, P. P. Rajeev, M. Smid, D.R. Symes, A.G.R. Thomas, D.A. Jaroszynski

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

1 Citation (Scopus)
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The laser wake-field accelerator (LWFA) traditionally produces high brightness, quasi-monoenergetic electron beams with Gaussian-like spatial and angular distributions. In the present work we investigate the generation of ultra-relativistic beams with ring-like structures in the blowout regime of the LWFA using a dual stage accelerator. A density down-ramp triggers injection after the first stage and is used to produce ring-like electron spectra in the 300 – 600 MeV energy range. These well defined, annular beams are observed simultaneously with the on-axis, high energy electron beams, with a divergence of a few milliradians. The rings have quasi-monoenergetic energy spectra with an RMS spread estimated to be less than 5%. Particle-in-cell simulations confirm that off-axis injection provides the electrons with the initial transverse momentum necessary to undertake distinct betatron oscillations within the plasma bubble during their acceleration process.
Original languageEnglish
Title of host publicationRelativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources III
EditorsDino A. Jaroszynski, MinSup Hur
Place of PublicationBellingham, WA
Number of pages8
Publication statusPublished - 24 Apr 2019
EventSPIE Optics + Optoelectronics - Clarion Congress Hotel, Prague, Czech Republic
Duration: 1 Apr 20194 Apr 2019


ConferenceSPIE Optics + Optoelectronics
Country/TerritoryCzech Republic


  • laser wake field accelerators
  • electron accelerator
  • plasma physics
  • high energy electrons


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    Spesyvtsev, R. (Creator), Brunetti, E. (Creator), Vieux, G. (Data Collector), Shahzad, M. (Data Collector), Maitrallain, A. (Contributor), Yoffe, S. (Contributor), Ersfeld, B. (Contributor), Kornaszewski, A. (Contributor), Streeter, M. J. V. (Contributor), Finlay, O. (Data Collector), Ma, Y. (Contributor), Kettle, B. (Data Collector), Dann, S. J. D. (Contributor), Albert, F. (Contributor), Bourgeois, N. (Contributor), Cipiccia, S. (Contributor), Cole, J. M. (Contributor), Gerstmayr, E. (Contributor), González, I. G. (Contributor), Higginbotham, A. (Contributor), Hussein, A. (Contributor), Falk, K. (Contributor), Krushelnick, K. (Contributor), Lemos, N. (Contributor), Lopes, N. (Contributor), Lumsdon, C. (Data Collector), Lundh, O. (Contributor), Mangles, S. P. D. (Contributor), Najmudin, Z. (Contributor), Rajeev, P. P. (Contributor), Smid, M. (Contributor), Symes, D. R. (Contributor), Thomas, A. G. R. (Contributor) & Jaroszynski, D. (Creator), University of Strathclyde, 13 Jun 2019


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