Electron trapping and acceleration on a downward density ramp: a two-stage approach

R.M.G.M. Trines, R. Bingham, Z. Najmudin, S. Mangles, L.O. Silva, R. Fonseca, P.A. Norreys

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

In a recent experiment at Lawrence Berkeley National Laboratory (Geddes et al 2008 Phys. Rev. Lett. 100 215004), electron bunches with about 1MeV mean energy and small absolute energy spread (about 0.3MeV) were produced by plasma wave breaking on a downward density ramp. It was then speculated that such a bunch might be accelerated further in a plasma of low constant density, while mostly preserving its small absolute energy spread. This would then lead to a bunch with a high mean energy and very low relative energy spread. In this paper, trapping of a low-energy, low-spread electron bunch on a downward density ramp, followed by acceleration in a constant-density plasma, has been explored through particle-in-cell simulations. It has been found that the scheme works best when it is used as a separate injection stage for a laserwakefield accelerator, where the injection and acceleration stages are separated by a vacuum gap.
LanguageEnglish
Article number045027
Number of pages10
JournalNew Journal of Physics
Volume12
DOIs
Publication statusPublished - 30 Apr 2010

Fingerprint

ramps
trapping
electrons
energy
injection
plasma waves
preserving
plasma density
vacuum
cells
simulation

Keywords

  • accelerators
  • beams
  • electromagnetism
  • nuclear physics
  • instrumentation and measurement
  • plasma physics
  • particle physics
  • field theory

Cite this

Trines, R. M. G. M., Bingham, R., Najmudin, Z., Mangles, S., Silva, L. O., Fonseca, R., & Norreys, P. A. (2010). Electron trapping and acceleration on a downward density ramp: a two-stage approach. New Journal of Physics, 12, [045027]. https://doi.org/10.1088/1367-2630/12/4/045027
Trines, R.M.G.M. ; Bingham, R. ; Najmudin, Z. ; Mangles, S. ; Silva, L.O. ; Fonseca, R. ; Norreys, P.A. / Electron trapping and acceleration on a downward density ramp: a two-stage approach. In: New Journal of Physics. 2010 ; Vol. 12.
@article{615f05aab6f74b839ce10613d3377411,
title = "Electron trapping and acceleration on a downward density ramp: a two-stage approach",
abstract = "In a recent experiment at Lawrence Berkeley National Laboratory (Geddes et al 2008 Phys. Rev. Lett. 100 215004), electron bunches with about 1MeV mean energy and small absolute energy spread (about 0.3MeV) were produced by plasma wave breaking on a downward density ramp. It was then speculated that such a bunch might be accelerated further in a plasma of low constant density, while mostly preserving its small absolute energy spread. This would then lead to a bunch with a high mean energy and very low relative energy spread. In this paper, trapping of a low-energy, low-spread electron bunch on a downward density ramp, followed by acceleration in a constant-density plasma, has been explored through particle-in-cell simulations. It has been found that the scheme works best when it is used as a separate injection stage for a laserwakefield accelerator, where the injection and acceleration stages are separated by a vacuum gap.",
keywords = "accelerators, beams, electromagnetism, nuclear physics, instrumentation and measurement, plasma physics, particle physics, field theory",
author = "R.M.G.M. Trines and R. Bingham and Z. Najmudin and S. Mangles and L.O. Silva and R. Fonseca and P.A. Norreys",
year = "2010",
month = "4",
day = "30",
doi = "10.1088/1367-2630/12/4/045027",
language = "English",
volume = "12",
journal = "New Journal of Physics",
issn = "1367-2630",

}

Electron trapping and acceleration on a downward density ramp: a two-stage approach. / Trines, R.M.G.M.; Bingham, R.; Najmudin, Z.; Mangles, S.; Silva, L.O.; Fonseca, R.; Norreys, P.A.

In: New Journal of Physics, Vol. 12, 045027, 30.04.2010.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electron trapping and acceleration on a downward density ramp: a two-stage approach

AU - Trines, R.M.G.M.

AU - Bingham, R.

AU - Najmudin, Z.

AU - Mangles, S.

AU - Silva, L.O.

AU - Fonseca, R.

AU - Norreys, P.A.

PY - 2010/4/30

Y1 - 2010/4/30

N2 - In a recent experiment at Lawrence Berkeley National Laboratory (Geddes et al 2008 Phys. Rev. Lett. 100 215004), electron bunches with about 1MeV mean energy and small absolute energy spread (about 0.3MeV) were produced by plasma wave breaking on a downward density ramp. It was then speculated that such a bunch might be accelerated further in a plasma of low constant density, while mostly preserving its small absolute energy spread. This would then lead to a bunch with a high mean energy and very low relative energy spread. In this paper, trapping of a low-energy, low-spread electron bunch on a downward density ramp, followed by acceleration in a constant-density plasma, has been explored through particle-in-cell simulations. It has been found that the scheme works best when it is used as a separate injection stage for a laserwakefield accelerator, where the injection and acceleration stages are separated by a vacuum gap.

AB - In a recent experiment at Lawrence Berkeley National Laboratory (Geddes et al 2008 Phys. Rev. Lett. 100 215004), electron bunches with about 1MeV mean energy and small absolute energy spread (about 0.3MeV) were produced by plasma wave breaking on a downward density ramp. It was then speculated that such a bunch might be accelerated further in a plasma of low constant density, while mostly preserving its small absolute energy spread. This would then lead to a bunch with a high mean energy and very low relative energy spread. In this paper, trapping of a low-energy, low-spread electron bunch on a downward density ramp, followed by acceleration in a constant-density plasma, has been explored through particle-in-cell simulations. It has been found that the scheme works best when it is used as a separate injection stage for a laserwakefield accelerator, where the injection and acceleration stages are separated by a vacuum gap.

KW - accelerators

KW - beams

KW - electromagnetism

KW - nuclear physics

KW - instrumentation and measurement

KW - plasma physics

KW - particle physics

KW - field theory

UR - http://www.scopus.com/inward/record.url?scp=77952589415&partnerID=8YFLogxK

UR - http://www.iop.org/EJ/journal/1367-2630/1

U2 - 10.1088/1367-2630/12/4/045027

DO - 10.1088/1367-2630/12/4/045027

M3 - Article

VL - 12

JO - New Journal of Physics

T2 - New Journal of Physics

JF - New Journal of Physics

SN - 1367-2630

M1 - 045027

ER -