Electron beam pointing stability of a laser wakefield accelerator

R. C. Issac, G. Vieux, G. H. Welsh, R. Shanks, E. Brunetti, S. Cipiccia, M. P. Anania, X. Yang, S. M. Wiggins, M. R. Islam, B. Ersfeld, J. Farmer, G. Raj, S. Chen, D. Clark, T. McCanny, D. A. Jaroszynski, DA Jaroszynski (Editor), A Rousse (Editor)

Research output: Contribution to conferencePaper

8 Citations (Scopus)

Abstract

Electron acceleration using plasma waves driven by ultra-short relativistic intensity laser pulses has undoubtedly excellent potential for driving a compact light source. However, for a wakefield accelerator to become a useful and reliable compact accelerator the beam properties need to meet a minimum standard. To demonstrate the feasibility of a wakefield based radiation source we have reliably produced electron beams with energies of 82 +/- 5 MeV, with 1 +/- 0.2% energy spread and 3 mrad r.m.s. divergence using a 0.9 J, 35 fs 800 nm laser. Reproducible beam pointing is essential for transporting the beam along the electron beam line. We find experimentally that electrons are accelerated close to the laser axis at low plasma densities. However, at plasma densities in excess of 10(19) cm(-3), electron beams have an elliptical beam profile with the major axis of the ellipse rotated with respect to the direction of polarization of the laser.
Original languageEnglish
DOIs
Publication statusPublished - 2009
EventConference on Harnessing Relativistic Plasma Waves as Novel Radiation Sources From Terahertz to X-Rays and Beyond - Prague, Czech Republic
Duration: 21 Apr 200923 Apr 2009

Conference

ConferenceConference on Harnessing Relativistic Plasma Waves as Novel Radiation Sources From Terahertz to X-Rays and Beyond
CountryCzech Republic
CityPrague
Period21/04/0923/04/09

Keywords

  • laser wakefield acceleration
  • emittance
  • undulator radiation
  • betatron oscillations
  • electron beams

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