High resolution, single shot emittance measurement of relativistic electrons from laser-driven accelerator

Grace Manahan, Enrico Brunetti, Richard Shanks, Mohammad Islam, Bernhard Ersfeld, Maria Pia Anania, Silvia Cipiccia, Riju Issac, Gaurav Raj, Gregory Vieux, Gregor H. Welsh, Mark Wiggins, Dino Jaroszynski

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

3 Citations (Scopus)

Abstract

The normalised transverse emittance is a measure of the quality of an electron beam from a particle accelerator. The brightness, parallelism and focusability are all functions of the emittance. Here we present a high-resolution single shot method of measuring the transverse emittance of a 125 +/- 3 MeV electron beam generated from a laser wakefield accelerator (LWFA) using a pepper-pot mask. An average normalised emittance of epsilon(rms,x,y) = 2.2 +/- 0.7, 2.3 +/- 0.6 pi-mm-mrad was measured, which is comparable to that of a conventional linear accelerator. The best measured emittance was epsilon(rms,x),= 1.1 +/- 0.1 pi-mm-mrad, corresponding to the resolution limit of our system. The low emittance indicates that this accelerator is suitable for driving a compact free electron laser.
Original languageEnglish
Title of host publicationLaser acceleration of electrons, protons, and ions and medical applications of laser-generated secondary sources of radiation and particles
EditorsW.P. Leemans, E. Esarey, S.M. Hooker, K.W.D. Ledingham, K. Spohr, P. McKenna
Place of PublicationBellingham
DOIs
Publication statusPublished - 2011
EventLaser Acceleration of Electrons, Protons, and Ions; and Medical Applications of Laser-Generated Secondary Sources of Radiation and Particles - Prague, Czech Republic
Duration: 18 Apr 201120 Apr 2011

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume8079
ISSN (Print)0277-786X

Conference

ConferenceLaser Acceleration of Electrons, Protons, and Ions; and Medical Applications of Laser-Generated Secondary Sources of Radiation and Particles
CountryCzech Republic
CityPrague
Period18/04/1120/04/11

Keywords

  • high resolution
  • single shot emittance measurement
  • relativistic electrons
  • laser-driven accelerator
  • emittance
  • pepper-pot mask
  • laser wakefield acceleration
  • beams

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