%0 Journal Article
%T Characterization of transverse beam emittance of electrons from a laser-plasma wakefield accelerator in the bubble regime using betatron x-ray radiation
%+ Blackett Laboratory
%+ Center for Ultrafast Optical Sciences (CUOS)
%+ GoLP/Centro de Física dos Plasmas
%+ Department of Computer Science [Copenhagen] (DIKU)
%+ Laboratoire d'informatique de l'École polytechnique [Palaiseau] (LIX)
%+ University College of London [London] (UCL)
%+ Laboratoire d'optique appliquée (LOA)
%A Kneip, S.
%A Mcguffey, C.
%A Martins, J.
%A Bloom, S.
%A Chvykov, V.
%A Dollar, F.
%A Fonseca, R.
%A Jolly, S.
%A Kalintchenko, G.
%A Krushelnick, K.
%A Maksimchuk, A.
%A Mangles, S. P. D.
%A Najmudin, Z.
%A Palmer, J.
%A Phuoc, K. Ta
%A Schumaker, W.
%A Silva, L. O.
%A Vieira, J.
%A Yanovsky, V.
%A Thomas, A. G. R.
%Z U.S. NRC 38-09-953FCT (Portugal)
%< avec comité de lecture
%J Physical Review Special Topics - Accelerators and Beams
%V 15
%N 2
%8 2012-02-02
%D 2012
%Z 1105.5559
%R 10.1103/PhysRevSTAB.15.021302
%Z Physics [physics]/Physics [physics]/Optics [physics.optics]
%Z Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph]Journal articles
%X We propose and use a technique to measure the transverse emittance of a laser-wakefield accelerated beam of relativistic electrons. The technique is based on the simultaneous measurements of the electron beam divergence given by v(perpendicular to)/v(parallel to), the measured spectrum gamma, and the transverse electron bunch size in the bubble r(perpendicular to). The latter is obtained via the measurement of the source size of the x rays emitted by the accelerating electron bunch in the bubble. We measure a normalized rms beam transverse emittance < 0.5 pi mm mrad as an upper limit for a spatially Gaussian, spectrally quasimonoenergetic electron beam with 230 MeV energy in agreement with numerical modeling and analytic theory in the bubble regime.
%G English
%L hal-01401477
%U https://hal-ensta-paris.archives-ouvertes.fr/hal-01401477
%~ X
%~ ENSTA
%~ CNRS
%~ LIX
%~ X-LOA
%~ X-LIX
%~ X-DEP
%~ X-DEP-INFO
%~ X-DEP-PHYS
%~ ENSTA_LOA