Three electron beams from a laser-plasma wakefield accelerator and the energy apportioning question

X. Yang, E. Brunetti, D. Reboredo Gil, G.H. Welsh, F.Y. Li, S. Cipiccia, B. Ersfeld, D.W. Grant, P.A. Grant, M.R. Islam, M.P. Tooley, G. Vieux, S.M. Wiggins, Z.M. Sheng, D.A. Jaroszynski

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Laser-wakefield accelerators are compact devices capable of delivering ultra-short electron bunches with pC-level charge and MeV-GeV energy by exploiting the ultra-high electric fields arising from the interaction of intense laser pulses with plasma. We show experimentally and through numerical simulations that a high-energy electron beam is produced simultaneously with two stable lower-energy beams that are ejected in oblique and counter-propagating directions, typically carrying off 5-10% of the initial laser energy. A MeV, 10s nC oblique beam is ejected in a 30-60 degree hollow cone, which is filled with more energetic electrons determined by the injection dynamics. A nC-level, 100s keV backward-directed beam is mainly produced at the leading edge of the plasma column. We discuss the apportioning of absorbed laser energy amongst the three beams. Knowledge of the distribution of laser energy and electron beam charge, which determine the overall efficiency, is important for various applications of laser-wakefield accelerators, including the development of staged high-energy accelerators.
LanguageEnglish
Article number43910
Number of pages10
JournalScientific Reports
Volume7
DOIs
Publication statusPublished - 10 Mar 2017

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plasma accelerators
laser plasmas
electron beams
lasers
accelerators
energy
leading edges
high energy electrons
hollow
cones
counters
electrons
injection
electric fields
pulses

Keywords

  • laser-wakefield accelerators
  • ultra-high-electric fields
  • ultra-short electron bunches
  • electron beam charge
  • laser energy distribution

Cite this

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title = "Three electron beams from a laser-plasma wakefield accelerator and the energy apportioning question",
abstract = "Laser-wakefield accelerators are compact devices capable of delivering ultra-short electron bunches with pC-level charge and MeV-GeV energy by exploiting the ultra-high electric fields arising from the interaction of intense laser pulses with plasma. We show experimentally and through numerical simulations that a high-energy electron beam is produced simultaneously with two stable lower-energy beams that are ejected in oblique and counter-propagating directions, typically carrying off 5-10{\%} of the initial laser energy. A MeV, 10s nC oblique beam is ejected in a 30-60 degree hollow cone, which is filled with more energetic electrons determined by the injection dynamics. A nC-level, 100s keV backward-directed beam is mainly produced at the leading edge of the plasma column. We discuss the apportioning of absorbed laser energy amongst the three beams. Knowledge of the distribution of laser energy and electron beam charge, which determine the overall efficiency, is important for various applications of laser-wakefield accelerators, including the development of staged high-energy accelerators.",
keywords = "laser-wakefield accelerators, ultra-high-electric fields, ultra-short electron bunches, electron beam charge, laser energy distribution",
author = "X. Yang and E. Brunetti and {Reboredo Gil}, D. and G.H. Welsh and F.Y. Li and S. Cipiccia and B. Ersfeld and D.W. Grant and P.A. Grant and M.R. Islam and M.P. Tooley and G. Vieux and S.M. Wiggins and Z.M. Sheng and D.A. Jaroszynski",
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Three electron beams from a laser-plasma wakefield accelerator and the energy apportioning question. / Yang, X.; Brunetti, E.; Reboredo Gil, D.; Welsh, G.H.; Li, F.Y.; Cipiccia, S.; Ersfeld, B.; Grant, D.W.; Grant, P.A.; Islam, M.R.; Tooley, M.P.; Vieux, G.; Wiggins, S.M.; Sheng, Z.M.; Jaroszynski, D.A.

In: Scientific Reports, Vol. 7, 43910, 10.03.2017.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Three electron beams from a laser-plasma wakefield accelerator and the energy apportioning question

AU - Yang, X.

AU - Brunetti, E.

AU - Reboredo Gil, D.

AU - Welsh, G.H.

AU - Li, F.Y.

AU - Cipiccia, S.

AU - Ersfeld, B.

AU - Grant, D.W.

AU - Grant, P.A.

AU - Islam, M.R.

AU - Tooley, M.P.

AU - Vieux, G.

AU - Wiggins, S.M.

AU - Sheng, Z.M.

AU - Jaroszynski, D.A.

PY - 2017/3/10

Y1 - 2017/3/10

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AB - Laser-wakefield accelerators are compact devices capable of delivering ultra-short electron bunches with pC-level charge and MeV-GeV energy by exploiting the ultra-high electric fields arising from the interaction of intense laser pulses with plasma. We show experimentally and through numerical simulations that a high-energy electron beam is produced simultaneously with two stable lower-energy beams that are ejected in oblique and counter-propagating directions, typically carrying off 5-10% of the initial laser energy. A MeV, 10s nC oblique beam is ejected in a 30-60 degree hollow cone, which is filled with more energetic electrons determined by the injection dynamics. A nC-level, 100s keV backward-directed beam is mainly produced at the leading edge of the plasma column. We discuss the apportioning of absorbed laser energy amongst the three beams. Knowledge of the distribution of laser energy and electron beam charge, which determine the overall efficiency, is important for various applications of laser-wakefield accelerators, including the development of staged high-energy accelerators.

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