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Generation of electron high energy beams with a ring-like structure by a dual stage laser wakefield accelerator

Spesyvtsev, R. ; Brunetti, E. ; Vieux, G. ; Shahzad, M. ; Maitrallain, A. ; Yoffe, S. ; Ersfeld, B. ; Kornaszewski, A. ; Streeter, M. J.V. and Finlay, O. , et al. (2019) 11036.
Abstract

The laser wake-field accelerator (LWFA) traditionally produces high brightness, quasi-monoenergetic electron beams with Gaussian-like spatial and angular distributions. In the present work we investigate the generation of ultra-relativistic beams with ring-like structures in the blowout regime of the LWFA using a dual stage accelerator. A density down-ramp triggers injection after the first stage and is used to produce ring-like electron spectra in the 300 - 600 MeV energy range. These well defined, annular beams are observed simultaneously with the on-axis, high energy electron beams, with a divergence of a few milliradians. The rings have quasi-monoenergetic energy spectra with an RMS spread estimated to be less than 5%.... (More)

The laser wake-field accelerator (LWFA) traditionally produces high brightness, quasi-monoenergetic electron beams with Gaussian-like spatial and angular distributions. In the present work we investigate the generation of ultra-relativistic beams with ring-like structures in the blowout regime of the LWFA using a dual stage accelerator. A density down-ramp triggers injection after the first stage and is used to produce ring-like electron spectra in the 300 - 600 MeV energy range. These well defined, annular beams are observed simultaneously with the on-axis, high energy electron beams, with a divergence of a few milliradians. The rings have quasi-monoenergetic energy spectra with an RMS spread estimated to be less than 5%. Particle-in-cell simulations confirm that off-axis injection provides the electrons with the initial transverse momentum necessary to undertake distinct betatron oscillations within the plasma bubble during their acceleration process.

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organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
electron accelerator, high energy electrons, Laser wake-eld accelerator, plasma physics
host publication
Relativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources III
editor
Hur, MinSup ; Jaroszynski, Dino A. ; and
volume
11036
article number
110360F
publisher
SPIE
external identifiers
  • scopus:85071643689
ISBN
9781510627383
DOI
10.1117/12.2522781
language
English
LU publication?
yes
id
b8ad3c6e-8ee5-4767-a791-623cb12cd3d2
date added to LUP
2019-09-26 14:30:14
date last changed
2019-10-08 03:59:09
@inproceedings{b8ad3c6e-8ee5-4767-a791-623cb12cd3d2,
  abstract     = {<p>The laser wake-field accelerator (LWFA) traditionally produces high brightness, quasi-monoenergetic electron beams with Gaussian-like spatial and angular distributions. In the present work we investigate the generation of ultra-relativistic beams with ring-like structures in the blowout regime of the LWFA using a dual stage accelerator. A density down-ramp triggers injection after the first stage and is used to produce ring-like electron spectra in the 300 - 600 MeV energy range. These well defined, annular beams are observed simultaneously with the on-axis, high energy electron beams, with a divergence of a few milliradians. The rings have quasi-monoenergetic energy spectra with an RMS spread estimated to be less than 5%. Particle-in-cell simulations confirm that off-axis injection provides the electrons with the initial transverse momentum necessary to undertake distinct betatron oscillations within the plasma bubble during their acceleration process.</p>},
  author       = {Spesyvtsev, R. and Brunetti, E. and Vieux, G. and Shahzad, M. and Maitrallain, A. and Yoffe, S. and Ersfeld, B. and Kornaszewski, A. and Streeter, M. J.V. and Finlay, O. and Ma, Y. and Kettle, B. and Dann, S. J.D. and Albert, F. and Bourgeois, N. and Cipiccia, S. and Cole, J. M. and Gerstmayr, E. and Gonzáles, I. G. and Higginbotham, A. and Hussein, A. E. and Falk, K. and Krushelnick, K. and Lemos, N. and Lopes, N. C. and Lumsdon, C. and Lundh, O. and Mangles, S. P.D. and Najmudin, Z. and Rajeev, P. P. and Smid, M. and Symes, D. R. and Thomas, A. G.R. and Jaroszynski, D. A.},
  booktitle    = {Relativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources III},
  editor       = {Hur, MinSup and Jaroszynski, Dino A.},
  isbn         = {9781510627383},
  language     = {eng},
  publisher    = {SPIE},
  title        = {Generation of electron high energy beams with a ring-like structure by a dual stage laser wakefield accelerator},
  url          = {http://dx.doi.org/10.1117/12.2522781},
  doi          = {10.1117/12.2522781},
  volume       = {11036},
  year         = {2019},
}