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

Alexey Kuznetsov, R. Stuik, Frederik Bijkerk, A.P. Shevelko

Research output: Contribution to journalArticleAcademicpeer-review

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).
Original languageEnglish
Article number085019
Pages (from-to)1-6
Number of pages6
JournalPlasma physics and controlled fusion
Volume54
Issue number8
DOIs
Publication statusPublished - 2012

Keywords

  • IR-81561
  • METIS-288258

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