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Träfflista för sökning "WFRF:(London E.) srt2:(2005-2009)"

Search: WFRF:(London E.) > (2005-2009)

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  • Chalupsky, J, et al. (author)
  • Non-thermal desorption/ablation of molecular solids induced by ultra-short soft x-ray pulses
  • 2009
  • In: Optics Express. - 1094-4087. ; 17:1, s. 208-217
  • Journal article (peer-reviewed)abstract
    • We report the first observation of single-shot soft x-ray laser induced desorption occurring below the ablation threshold in a thin layer of poly ( methyl methacrylate) - PMMA. Irradiated by the focused beam from the Free-electron LASer in Hamburg ( FLASH) at 21.7nm, the samples have been investigated by atomic-force microscope (AFM) enabling the visualization of mild surface modifications caused by the desorption. A model describing non-thermal desorption and ablation has been developed and used to analyze single-shot imprints in PMMA. An intermediate regime of materials removal has been found, confirming model predictions. We also report below-threshold multiple-shot desorption of PMMA induced by high-order harmonics (HOH) at 32nm. Short-time exposure imprints provide sufficient information about transverse beam profile in HOH's tight focus whereas long-time exposed PMMA exhibits radiation-initiated surface hardening making the beam profile measurement infeasible. (C) 2008 Optical Society of America
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  • Khanna, Chand, et al. (author)
  • The dog as a cancer model
  • 2006
  • In: Nature Biotechnology. - : Springer Science and Business Media LLC. - 1087-0156 .- 1546-1696. ; 24:9, s. 1065-1066
  • Journal article (peer-reviewed)
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