Linearly tapered discharge capillary waveguides as a medium for a laser plasma wakefield accelerator

Salima Saleh Abu-Azoum, Mark Wiggins, B. Ersfeld, K. Hart, G. Vieux, X. Yang, G. H. Welsh, R. C. Issac, M. P. Reijnders, D. R. Jones, Dino A. Jaroszynski

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Gas-filled capillary discharge waveguides are commonly used as media for plasma wakefield accelerators. We show that effective waveguides can be manufactured using a femtosecond laser micromachining technique to produce a linearly tapered plasma density, which enables the energy of the accelerator to be enhanced significantly. A laser guiding efficiency in excess of 82% at sub-relativistic intensities has been demonstrated in a 40 mm long capillary with a diameter tapering from 320 μm to 270 μm, which gives rise to an on-axis, time-averaged plasma density that varies from 1.0 × 1018 cm−3 to 1.6 × 1018 cm−3.
LanguageEnglish
Number of pages3
JournalApplied Physics Letters
Volume100
Early online date4 Jan 2012
DOIs
Publication statusPublished - 2012

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plasma accelerators
laser plasmas
plasma density
waveguides
laser machining
tapering
accelerators
gases
lasers
energy

Keywords

  • radiation
  • tapered discharge
  • capillary waveguides
  • laser plasma
  • wakefield accelerator

Cite this

Abu-Azoum, Salima Saleh ; Wiggins, Mark ; Ersfeld, B. ; Hart, K. ; Vieux, G. ; Yang, X. ; Welsh, G. H. ; Issac, R. C. ; Reijnders, M. P. ; Jones, D. R. ; Jaroszynski, Dino A. / Linearly tapered discharge capillary waveguides as a medium for a laser plasma wakefield accelerator. In: Applied Physics Letters. 2012 ; Vol. 100.
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Linearly tapered discharge capillary waveguides as a medium for a laser plasma wakefield accelerator. / Abu-Azoum, Salima Saleh; Wiggins, Mark; Ersfeld, B.; Hart, K.; Vieux, G.; Yang, X.; Welsh, G. H.; Issac, R. C.; Reijnders, M. P.; Jones, D. R.; Jaroszynski, Dino A.

In: Applied Physics Letters, Vol. 100, 2012.

Research output: Contribution to journalArticle

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T1 - Linearly tapered discharge capillary waveguides as a medium for a laser plasma wakefield accelerator

AU - Abu-Azoum, Salima Saleh

AU - Wiggins, Mark

AU - Ersfeld, B.

AU - Hart, K.

AU - Vieux, G.

AU - Yang, X.

AU - Welsh, G. H.

AU - Issac, R. C.

AU - Reijnders, M. P.

AU - Jones, D. R.

AU - Jaroszynski, Dino A.

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AB - Gas-filled capillary discharge waveguides are commonly used as media for plasma wakefield accelerators. We show that effective waveguides can be manufactured using a femtosecond laser micromachining technique to produce a linearly tapered plasma density, which enables the energy of the accelerator to be enhanced significantly. A laser guiding efficiency in excess of 82% at sub-relativistic intensities has been demonstrated in a 40 mm long capillary with a diameter tapering from 320 μm to 270 μm, which gives rise to an on-axis, time-averaged plasma density that varies from 1.0 × 1018 cm−3 to 1.6 × 1018 cm−3.

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