Ultrashort pulse filamentation and monoenergetic electron beam production in lwfas

A.G.R. Thomas, S.P.D. Mangles, C.D. Murphy, A.E. Dangor, P.S. Foster, J.G. Gallacher, D.A. Jaroszynski, C. Kamperidis

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

In the experiments reported here, the filamentation of ultrashort laser pulses, due to non-optimal choice of focusing geometry and/or electron number density, has a severely deleterious effect on monoenergetic electron beam production in laser wakefield accelerators. Interactions with relatively small focal spots, w0 < λp/2, and with pulse length cτ λp, incur fragmentation into a large number of low power filaments. These filaments are modulated with a density dependent size of, on average, close to λp. The break-up of the driving pulse results in shorter interaction lengths, compared with larger focal spots, and broad energy-spread electron beams, which are not useful for applications. Filamentation of the pulse occurs because the strongly dynamic focusing (small f-number) of the laser prevents pulse length compression before reaching its minimum spot-size, which results in non-spherical focusing gradients.
LanguageEnglish
JournalPlasma Physics and Controlled Fusion
Volume51
Issue number2
DOIs
Publication statusPublished - Feb 2009

Fingerprint

Ultrashort pulses
Electron beams
electron beams
Beam plasma interactions
pulses
Particle accelerators
Laser pulses
filaments
Geometry
Electrons
Lasers
lasers
Experiments
fragmentation
accelerators
interactions
gradients
geometry
electrons
energy

Keywords

  • ultrashort pulse filamentation
  • monoenergetic electron beam production
  • lwfas

Cite this

Thomas, A. G. R., Mangles, S. P. D., Murphy, C. D., Dangor, A. E., Foster, P. S., Gallacher, J. G., ... Kamperidis, C. (2009). Ultrashort pulse filamentation and monoenergetic electron beam production in lwfas. Plasma Physics and Controlled Fusion, 51(2). https://doi.org/10.1088/0741-3335/51/2/024010
Thomas, A.G.R. ; Mangles, S.P.D. ; Murphy, C.D. ; Dangor, A.E. ; Foster, P.S. ; Gallacher, J.G. ; Jaroszynski, D.A. ; Kamperidis, C. / Ultrashort pulse filamentation and monoenergetic electron beam production in lwfas. In: Plasma Physics and Controlled Fusion. 2009 ; Vol. 51, No. 2.
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Thomas, AGR, Mangles, SPD, Murphy, CD, Dangor, AE, Foster, PS, Gallacher, JG, Jaroszynski, DA & Kamperidis, C 2009, 'Ultrashort pulse filamentation and monoenergetic electron beam production in lwfas' Plasma Physics and Controlled Fusion, vol. 51, no. 2. https://doi.org/10.1088/0741-3335/51/2/024010

Ultrashort pulse filamentation and monoenergetic electron beam production in lwfas. / Thomas, A.G.R.; Mangles, S.P.D.; Murphy, C.D.; Dangor, A.E.; Foster, P.S.; Gallacher, J.G.; Jaroszynski, D.A.; Kamperidis, C.

In: Plasma Physics and Controlled Fusion, Vol. 51, No. 2, 02.2009.

Research output: Contribution to journalArticle

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AU - Mangles, S.P.D.

AU - Murphy, C.D.

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AU - Foster, P.S.

AU - Gallacher, J.G.

AU - Jaroszynski, D.A.

AU - Kamperidis, C.

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