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|Title:||Simulations of efficient Raman amplification into the multipetawatt regime|
|Authors:||Trines, R. M. G. M.|
Fonseca, R. A.
Silva, L. O.
Cairns, R. A.
Norreys, P. A.
|Publisher:||Nature Publishing Group|
|Abstract:||Contemporary high-power laser systems make use of solid-state laser technology to reach petawatt pulse powers. The breakdown threshold for optical components in these systems, however, demands metre-scale beams. Raman amplification of laser beams promises a breakthrough by the use of much smaller amplifying media, that is, millimetre-diameter plasmas, but so far only 60 GW peak powers have been obtained in the laboratory, far short of the desired multipetawatt regime. Here we show, through the first large-scale multidimensional particle-in-cell simulations of this process, that multipetawatt peak powers can be reached, but only in a narrow parameter window dictated by the growth of plasma instabilities. Raman amplification promises reduced cost and complexity of intense lasers, enabling much greater access to higher-intensity regimes for scientific and industrial applications. Furthermore, we show that this process scales to short wavelengths, enabling compression of X-ray free-electron laser pulses to attosecond duration.|
|Description:||WOS:000285501100022 (Nº de Acesso Web of Science)|
“Prémio Científico ISCTE-IUL 2012”
|Publisher version:||The definitive version is available at: http://dx.doi.org/10.1038/NPHYS1793|
|Appears in Collections:||CTI-RI - Artigos em revistas científicas internacionais com arbitragem científica|
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|Nat Phys 2011 Trines.pdf||1.39 MB||Adobe PDF||View/Open Request a copy|
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