High efficiency proton beam generation through target thickness control in femtosecond laser-plasma interactions

J. S. Green, A. P. L. Robinson, N. Booth, D. C. Carroll, R. J. Dance, R. J. Gray, D. A. MacLellan, P. McKenna, C. D. Murphy, D. Rusby, L. Wilson

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Bright proton beams with maximum energies of up to 30MeV have been observed in an experiment investigating ion sheath acceleration driven by a short pulse (<50 fs) laser. The scaling of maximum proton energy and total beam energy content at ultra-high intensities of ∼10<sup>21</sup> W cm<sup>-2</sup> was investigated, with the interplay between target thickness and laser pre-pulse found to be a key factor. While the maximum proton energies observed were maximised for lm-thick targets, the total proton energy content was seen to peak for thinner, 500 nm, foils. The total proton beam energy reached up to 440 mJ (a conversion efficiency of 4%), marking a significant step forward for many laser-driven ion applications. The experimental results are supported by hydrodynamic and particle-in-cell simulations.

LanguageEnglish
Article number214101
Number of pages5
JournalApplied Physics Letters
Volume104
Issue number21
DOIs
Publication statusPublished - 26 May 2014

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target thickness
laser plasma interactions
proton energy
proton beams
ion sheaths
pulses
marking
lasers
foils
hydrodynamics
energy
cells
ions
simulation

Keywords

  • protons
  • aluminium
  • proton beam generation
  • laser plasma

Cite this

Green, J. S., Robinson, A. P. L., Booth, N., Carroll, D. C., Dance, R. J., Gray, R. J., ... Wilson, L. (2014). High efficiency proton beam generation through target thickness control in femtosecond laser-plasma interactions. Applied Physics Letters, 104(21), [214101]. https://doi.org/10.1063/1.4879641
Green, J. S. ; Robinson, A. P. L. ; Booth, N. ; Carroll, D. C. ; Dance, R. J. ; Gray, R. J. ; MacLellan, D. A. ; McKenna, P. ; Murphy, C. D. ; Rusby, D. ; Wilson, L. / High efficiency proton beam generation through target thickness control in femtosecond laser-plasma interactions. In: Applied Physics Letters. 2014 ; Vol. 104, No. 21.
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Green, JS, Robinson, APL, Booth, N, Carroll, DC, Dance, RJ, Gray, RJ, MacLellan, DA, McKenna, P, Murphy, CD, Rusby, D & Wilson, L 2014, 'High efficiency proton beam generation through target thickness control in femtosecond laser-plasma interactions' Applied Physics Letters, vol. 104, no. 21, 214101. https://doi.org/10.1063/1.4879641

High efficiency proton beam generation through target thickness control in femtosecond laser-plasma interactions. / Green, J. S.; Robinson, A. P. L.; Booth, N.; Carroll, D. C.; Dance, R. J.; Gray, R. J.; MacLellan, D. A.; McKenna, P.; Murphy, C. D.; Rusby, D.; Wilson, L.

In: Applied Physics Letters, Vol. 104, No. 21, 214101, 26.05.2014.

Research output: Contribution to journalArticle

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AU - Gray, R. J.

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