Application of pulsed laser irradiation for removal of hydrogen retained in tungsten

Kentaro Hirata, Kenichiro Furumoto, Naoji Yamamoto, Tetsuo Tanabe

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

For the purpose of removal of tritium retained in tungsten (W), pulsed laser irradiation has been applied. The laser light used here was the fourth harmonic of Nd: YAG laser (wavelength; 266 nm, pulse width; 20 ps, pulse frequency; 10 Hz, laser energy up to 3 mJ/pulse). Samples were pure W plates and those saturated with D by D2+ ion implantation at room temperature with using a 2.5 keV ion gun. Released ions and molecules by the laser irradiation were measured by a time-of-flight mass spectrometer (TOFMS) and a quadrupole mass spectrometer (Q-mass), respectively. Ablation of W was observed by the laser irradiation with a deposited power density above 1.5 × 1011 W/cm2 (3 J/cm2/pulse) (an ablation threshold) and D removals below and above the ablation threshold were quite different. The most effective removal of tritium retained in W could be realized by the pulsed laser irradiation with the power density of just below the ablation threshold.

Original languageEnglish
Pages (from-to)298-301
Number of pages4
JournalJournal of Nuclear Materials
Volume443
Issue number1-3
DOIs
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Fingerprint Dive into the research topics of 'Application of pulsed laser irradiation for removal of hydrogen retained in tungsten'. Together they form a unique fingerprint.

Cite this