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Influence of laser irradiated spot size on energetic electron injection and proton acceleration in foil targets

Coury, M. (author)
Carroll, D. C. (author)
Robinson, A. P. L. (author)
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Yuan, X. H. (author)
Brenner, C. M. (author)
Burza, Matthias (author)
Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
Gray, R. J. (author)
Quinn, M. N. (author)
Lancaster, K. L. (author)
Li, Y. T. (author)
Lin, X. X. (author)
Tresca, O. (author)
Wahlström, Claes-Göran (author)
Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
Neely, D. (author)
McKenna, P. (author)
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 (creator_code:org_t)
AIP Publishing, 2012
2012
English.
In: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 100:7
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The influence of irradiated spot size on laser energy coupling to electrons, and subsequently to protons, in the interaction of intense laser pulses with foil targets is investigated experimentally. Proton acceleration is characterized for laser intensities ranging from 2 x 10(18) - 6 x 10(20) W/cm(2), by (1) variation of the laser energy for a fixed irradiated spot size, and (2) by variation of the spot size for a fixed energy. At a given laser pulse intensity, the maximum proton energy is higher under defocus illumination compared to tight focus and the results are explained in terms of geometrical changes to the hot electron injection. (C) 2012 American Institute of Physics. [doi:10.1063/1.3685615]

Subject headings

NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)

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