Analysis of soft x-ray emission spectra of laser-produced dysprosium, erbium and thulium plasmas

John Sheil, Padraig Dunne, Takeshi Higashiguchi, Domagoj Kos, Elaine Long, Takanori Miyazaki, Fergal O'Reilly, Gerard O'Sullivan, Paul Sheridan, Chihiro Suzuki, Emma Sokell, Elgiva White, Deirdre Kilbane

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Soft x-ray emission spectra of dysprosium, erbium and thulium ions created in laser-produced plasmas were recorded with a flat-field grazing-incidence spectrometer in the 2.5-8 nm spectral range. The ions were produced using an Nd:YAG laser of 7 ns pulse duration and the spectra were recorded at various power densities. The experimental spectra were interpreted with the aid of the Cowan suite of atomic structure codes and the flexible atomic code. At wavelengths above 5.5 nm the spectra are dominated by overlapping n = 4 - n = 4 unresolved transition arrays from adjacent ion stages. Below 6 nm, n = 4 - n = 5 transitions also give rise to a series of interesting overlapping spectral features.

Original languageEnglish
Article number065006
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume50
Issue number6
DOIs
Publication statusPublished - 07 Mar 2017
Externally publishedYes

Keywords

  • dysprosium
  • erbium
  • EUV emission
  • laser-produced plasma
  • thulium
  • unresolved transition arrays

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