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Title: Characterization of transverse beam emittance of electrons from a laser-plasma wakefield accelerator in the bubble regime using betatron x-ray radiation
Authors: Kneip, S.
McGuffey, C.
Martins, J. L.
Bloom, M. S.
Chvykov, V. V.
Dollar, F. J.
Fonseca, R. A.
Jolly, S. W.
Kalintchenko, G. A.
Krushelnick, K.
Maksimchuk, A. M.
Mangles, S. P. D.
Najmudin, Z.
Palmer, C. A. J.
Ta Phuoc, K.
Schumaker, W.
Silva, L. O.
Vieira, J.
Yanovsky, V. P.
Thomas, A. G. R.
Issue Date: 2012
Publisher: American Physical Society
Abstract: 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.
Description: WOS:000300104100003 (Nº de Acesso Web of Science)
Peer reviewed: Sim
ISSN: 1098-4402
Publisher version: The definitive version is available at:
Appears in Collections:CTI-RI - Artigos em revistas científicas internacionais com arbitragem científica

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