Spectral and spatial structure of extreme ultraviolet radiation in laser plasma-wall interactions

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Kuznetsov, A.S. and Stuik, R. and Bijkerk, F. and Shevelko, A.P. (2012) Spectral and spatial structure of extreme ultraviolet radiation in laser plasma-wall interactions. Plasma physics and controlled fusion, 54 (8). 1 - 6. ISSN 0741-3335

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Abstract:Intense extreme ultraviolet (XUV) radiation was observed during the interaction of low-temperature laser plasmas and wall materials. Laser plasmas with electron temperature Te ~ 40 eV were created on massive solid targets (CF2 and Al) by an excimer KrF laser (248 nm/0.5 J/13 ns/1 Hz). The wall was installed in the path of the laser-produced plasma expansion at distances between 0.5 and 3.5 mm. The spectral and spatial structure of XUV radiation (spectral range of λ ~ 6–20 nm) was studied using a grazing incidence spectrometer with a back-illuminated CCD camera as a detector. XUV spectra of F and Al ions were analyzed. At large plasma–wall distances three-body recombination was identified as the dominant process responsible for ionic level population and radiation. The experiments demonstrate an effective way of creating low-temperature (Te ~ 1–10 eV) plasmas interacting with solid surfaces (walls).
Item Type:Article
Copyright:© 2012 IOP Publishing
Faculty:
Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/81561
Official URL:http://dx.doi.org/10.1088/0741-3335/54/8/085019
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