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

Kentaro Hirata, Kenichiro Furumoto, Naoji Yamamoto, Tetsuo Tanabe

Research output: Contribution to journalArticle

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 - Aug 28 2013

Fingerprint

Tungsten
Laser beam effects
Ablation
Pulsed lasers
ablation
Hydrogen
pulsed lasers
tungsten
Laser pulses
irradiation
Tritium
Mass spectrometers
hydrogen
tritium
mass spectrometers
lasers
thresholds
Lasers
radiant flux density
pulses

All Science Journal Classification (ASJC) codes

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

Cite this

Application of pulsed laser irradiation for removal of hydrogen retained in tungsten. / Hirata, Kentaro; Furumoto, Kenichiro; Yamamoto, Naoji; Tanabe, Tetsuo.

In: Journal of Nuclear Materials, Vol. 443, No. 1-3, 28.08.2013, p. 298-301.

Research output: Contribution to journalArticle

Hirata, Kentaro ; Furumoto, Kenichiro ; Yamamoto, Naoji ; Tanabe, Tetsuo. / Application of pulsed laser irradiation for removal of hydrogen retained in tungsten. In: Journal of Nuclear Materials. 2013 ; Vol. 443, No. 1-3. pp. 298-301.
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