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Proceedings Paper

Generation of electron high energy beams with a ring-like structure by a dual stage laser wakefield accelerator
Author(s): R. Spesyvtsev; E. Brunetti; G. Vieux; M. Shahzad; A. Maitrallain; S. Yoffe; B. Ersfeld; A. Kornaszewski; M. J. V. Streeter; O. Finlay; Y. Ma; B. Kettle; S. J. D. Dann; F. Albert; N. Bourgeois; S. Cipiccia; J. M. Cole; E. Gerstmayr; I. G. Gonzáles; A. Higginbotham; A. E. Hussein; K. Falk; K. Krushelnick; N. Lemos; N. C. Lopes; C. Lumsdon; O. Lundh; S. P. D. Mangles; Z. Najmudin; P. P. Rajeev; M. Smid; D. R. Symes; A. G. R. Thomas; D. A. Jaroszynski
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Paper 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%. 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.

Paper Details

Date Published: 24 April 2019
PDF: 8 pages
Proc. SPIE 11036, Relativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources III, 110360F (24 April 2019); doi: 10.1117/12.2522781
Show Author Affiliations
R. Spesyvtsev, Univ. of Strathclyde (United Kingdom)
E. Brunetti, Univ. of Strathclyde (United Kingdom)
The Cockcroft Institute (United Kingdom)
G. Vieux, Univ. of Strathclyde (United Kingdom)
M. Shahzad, Univ. of Strathclyde (United Kingdom)
A. Maitrallain, Univ. of Strathclyde (United Kingdom)
S. Yoffe, Univ. of Strathclyde (United Kingdom)
B. Ersfeld, Univ. of Strathclyde (United Kingdom)
A. Kornaszewski, Univ. of Strathclyde (United Kingdom)
M. J. V. Streeter, Lancaster Univ. (United Kingdom)
The Cockcroft Institute (United Kingdom)
Imperial College London (United Kingdom)
O. Finlay, Lancaster Univ. (United Kingdom)
Y. Ma, Lancaster Univ. (United Kingdom)
The Cockcroft Institute (United Kingdom)
Univ. of Michigan (United States)
B. Kettle, Imperial College London (United Kingdom)
S. J. D. Dann, Lancaster Univ. (United Kingdom)
The Cockcroft Institute (United Kingdom)
F. Albert, Imperial College London (United States)
N. Bourgeois, STFC Rutherford Appleton Lab. (United Kingdom)
S. Cipiccia, Diamond Light Source Ltd. (United Kingdom)
J. M. Cole, Imperial College London (United Kingdom)
E. Gerstmayr, Imperial College London (United Kingdom)
I. G. Gonzáles, Lund Univ. (Sweden)
A. Higginbotham, Univ. of York (United Kingdom)
A. E. Hussein, Univ. of Michigan (United States)
K. Falk, Institute of Physics of the CAS, v. v. i. (Czech Republic)
K. Krushelnick, Univ. of Michigan (United States)
N. Lemos, Lawrence Livermore National Lab. (United States)
N. C. Lopes, Imperial College London (United Kingdom)
Institut Superior Técnico (Portugal)
C. Lumsdon, Univ. of York (United Kingdom)
O. Lundh, Lund Univ. (Sweden)
S. P. D. Mangles, Imperial College London (United Kingdom)
Z. Najmudin, Imperial College London (United Kingdom)
P. P. Rajeev, STFC Rutherford Appleton Lab. (United Kingdom)
M. Smid, Institute of Physics of the CAS, v. v. i. (Czech Republic)
D. R. Symes, STFC Rutherford Appleton Lab. (United Kingdom)
A. G. R. Thomas, Lancaster Univ. (United Kingdom)
The Cockcroft Institute (United Kingdom)
Univ. of Michigan (United States)
D. A. Jaroszynski, Univ. of Strathclyde (United Kingdom)
The Cockcroft Institute (United Kingdom)


Published in SPIE Proceedings Vol. 11036:
Relativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources III
Dino A. Jaroszynski; MinSup Hur, Editor(s)

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