EUV Spectra from Laser-Produced Tungsten Plasmas

Hayato OHASHI, Hiromu KAWASAKI, Yuta SHIMADA, Shinichi NAMBA, Gerry O'SULLIVAN, Takeshi HIGASHIGUCHI

Research output: Contribution to journalArticlepeer-review

Abstract

We observed the EUV emission spectra from laser-produced tungsten plasmas. The spectral structures were compared by optical thickness due to the critical density difference of 1 × 1021 and 4 × 1021 cm−3 with laser wavelengths of 1064 nm and 532 nm, respectively. We found some spectral structure changes, an increase of emission in 1 - 3 nm region under an optically thick condition while a decrease of a peak near 5 nm for unresolved transition array of 4d - 4f transitions. Some 1.3 - 2.5 nm peaks were attributed to charge states higher than W30+. We showed some dependence of the spectral behavior for the EUV emission.

Original languageEnglish
Article number2401014
JournalPlasma and Fusion Research
Volume20
DOIs
StatePublished - 2025

Keywords

  • extreme ultraviolet (EUV)
  • highly charged ion (HCI) DOI: 10.1585/pfr.20.2401014
  • laser-produced plasma
  • tungsten (W)

ASJC Scopus subject areas

  • Condensed Matter Physics

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