Application of a picosecond laser plasma continuum light source to a dual-laser plasma photoabsorption experiment

O. Meighan, C. Danson, L. Dardis, Ciaran Lewis, A. MacPhee, C. McGuinness, R. O'Rourke, W. Shaikh, I.C.E. Turcu, J.T. Costello

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

The characteristics of an extreme-ultraviolet (XUV) continuum light source and its application to a dual-laser plasma (DLP) photoabsorption experiment are described. The continuum emitting plasma was formed by focusing a 7 ps, 248 nm, 15 mJ laser pulse onto a number of selected targets known to be good XUV continuum emitters (Sm, W, Au and Pb), while the second absorbing plasma was produced by a 15 ns, 1064 nm, 300 mi pulse. The duration of the continuum emission for these plasmas has a mean value of similar to 150 ps, but depends on both the target material and the picosecond laser pulse energy. Using this picosecond DLP set-up we have been able to measure the photoabsorption spectrum of an actinide ion (thorium) for the first time.
Original languageEnglish
Pages (from-to)1159-1168
Number of pages10
JournalJournal Of Physics B-atomic Molecular And Optical Physics
Volume33
Issue number6
Publication statusPublished - 28 Mar 2000

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Atomic and Molecular Physics, and Optics

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