Characterization of transverse beam emittance of electrons from a laser-plasma wakefield accelerator in the bubble regime using betatron x-ray radiation

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.
Complete list of metadatas

https://hal-ensta-paris.archives-ouvertes.fr//hal-01401477
Contributor : Pierre Zaparucha <>
Submitted on : Wednesday, November 23, 2016 - 2:20:24 PM
Last modification on : Wednesday, August 7, 2019 - 2:34:15 PM

Links full text

Identifiers

Collections

Citation

S. Kneip, C. Mcguffey, J. Martins, S. Bloom, V. Chvykov, et al.. Characterization of transverse beam emittance of electrons from a laser-plasma wakefield accelerator in the bubble regime using betatron x-ray radiation. Physical Review Special Topics - Accelerators and Beams, 2012, 15 (2), ⟨10.1103/PhysRevSTAB.15.021302⟩. ⟨hal-01401477⟩

Share

Metrics

Record views

270