• Open Access

Trace-space reconstruction of low-emittance electron beams through betatron radiation in laser-plasma accelerators

A. Curcio, M. Anania, F. Bisesto, E. Chiadroni, A. Cianchi, M. Ferrario, F. Filippi, D. Giulietti, A. Marocchino, M. Petrarca, V. Shpakov, and A. Zigler
Phys. Rev. Accel. Beams 20, 012801 – Published 17 January 2017

Abstract

A new methodology able to model and reconstruct the transverse trace space of low-emittance electron beams accelerated in the bubble regime of laser-plasma interaction is presented. The single-shot measurement of both the electron energy spectrum and the betatron radiation spectrum is shown to allow a complete measurement of the transverse emittance, including the correlation term. A novel technique to directly measure the betatron oscillation amplitude distribution is described and tested at the SPARC-LAB test facility through the interaction of the ultrashort ultraintense Ti:Sa laser FLAME with a He gas-jet target. Via the exposed technique the beam transverse profile is also retrieved. From the study of the electron transverse dynamics inside the plasma bubble, the nonlinear correlation between the betatron amplitude and the divergence, i.e. the angle with respect the acceleration axis, is found. The angular distribution of the electron beam inside the bubble is retrieved. The knowledge of the trace-space density allows a more accurate measurement of the transverse emittance with respect to previous paradigms.

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  • Received 16 September 2016

DOI:https://doi.org/10.1103/PhysRevAccelBeams.20.012801

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Accelerators & Beams

Authors & Affiliations

A. Curcio1,2,*, M. Anania1, F. Bisesto1,2, E. Chiadroni1, A. Cianchi3, M. Ferrario1, F. Filippi1,2, D. Giulietti4, A. Marocchino1, M. Petrarca5, V. Shpakov1, and A. Zigler1,6

  • 1INFN-LNF, via Enrico Fermi 40, 00044 Frascati, Rome, Italy
  • 2Department of Physics, “Sapienza” University of Rome, Piazzale A. Moro 2, I-00185 Rome, Italy
  • 3INFN and Department of Physics, “Tor Vergata” University, via della ricerca Scientifica 1, 00133 Rome, Italy
  • 4Physics Department of the University and INFN, Largo Bruno Pontecorvo 3, 56127 Pisa, Italy
  • 5Department of Basic and Applied Sciences for Engineering (SBAI) and INFN-Roma1, “Sapienza” University of Rome, Via A. Scarpa 14, 00161 Rome, Italy
  • 6Racah Institute of Physics, Hebrew University, Jerusalem 91904, Israel

  • *alessandro.curcio@lnf.infn.it

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Vol. 20, Iss. 1 — January 2017

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