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Laser pulse propaga...
Laser pulse propagation and enhanced energy coupling to fast electrons in dense plasma gradients
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Gray, R. J. (author)
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Carroll, D. C. (author)
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Yuan, X. H. (author)
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Brenner, C. M. (author)
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- 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
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Coury, M. (author)
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Lancaster, K. L. (author)
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Lin, X. X. (author)
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Li, Y. T. (author)
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Neely, D. (author)
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Quinn, M. N. (author)
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Tresca, O. (author)
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- 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
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McKenna, P. (author)
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(creator_code:org_t)
- 2014-11-28
- 2014
- English.
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In: New Journal of Physics. - : IOP Publishing. - 1367-2630. ; 16
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Abstract
Subject headings
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- Laser energy absorption to fast electrons during the interaction of an ultra-intense (10(20) Wcm(-2)), picosecond laser pulse with a solid is investigated, experimentally and numerically, as a function of the plasma density scale length at the irradiated surface. It is shown that there is an optimum density gradient for efficient energy coupling to electrons and that this arises due to strong self-focusing and channeling driving energy absorption over an extended length in the preformed plasma. At longer density gradients the laser filaments, resulting in significantly lower overall energy coupling. As the scale length is further increased, a transition to a second laser energy absorption process is observed experimentally via multiple diagnostics. The results demonstrate that it is possible to significantly enhance laser energy absorption and coupling to fast electrons by dynamically controlling the plasma density gradient.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- laser-plasma interaction
- laser pulse propagation
- fast electron
- generation
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Gray, R. J.
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Carroll, D. C.
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Yuan, X. H.
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Brenner, C. M.
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Burza, Matthias
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Coury, M.
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show more...
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Lancaster, K. L.
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Lin, X. X.
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Li, Y. T.
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Neely, D.
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Quinn, M. N.
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Tresca, O.
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Wahlström, Claes ...
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McKenna, P.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
- Articles in the publication
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New Journal of P ...
- By the university
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Lund University