Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
<mark>Journal publication date</mark> | 08/2009 |
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<mark>Journal</mark> | European Physical Journal - Special Topics |
Issue number | 1 |
Volume | 175 |
Number of pages | 4 |
Pages (from-to) | 57-60 |
Publication Status | Published |
Early online date | 14/08/09 |
<mark>Original language</mark> | English |
X-ray harmonic radiation extending to 3.3 angstrom, 3.8 keV from Petawatt class laser-solid interactions is presented. The harmonic spectra display a relativistic limit scaling up to similar to 3000th order, above which an intensity dependent scaling roll-over is observed. Highly directional beamed emission for harmonic photon energy h nu > 1 keV is found to be into a cone angle