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j.sab.2014.05.009.pdf | 2.31 MB | Adobe PDF | 見る/開く |
タイトル: | Effects of pulse width on nascent laser-induced bubbles for underwater laser-induced breakdown spectroscopy |
著者: | Sakka, Tetsuo https://orcid.org/0000-0002-1892-8056 (unconfirmed) Tamura, Ayaka Matsumoto, Ayumu Fukami, Kazuhiro https://orcid.org/0000-0001-9120-5578 (unconfirmed) Nishi, Naoya https://orcid.org/0000-0002-5654-5603 (unconfirmed) Thornton, Blair |
著者名の別形: | 作花, 哲夫 |
キーワード: | Underwater LIBS Cavitation bubble Laser pulse width Long pulse Liquid-phase laser ablation |
発行日: | 1-Jul-2014 |
出版者: | Elsevier B.V. |
誌名: | Spectrochimica Acta Part B: Atomic Spectroscopy |
巻: | 97 |
開始ページ: | 94 |
終了ページ: | 98 |
抄録: | The reason for the significant advantage offered by long-pulse (150 ns) irradiation in underwater laser-induced breakdown spectroscopy (LIBS) is investigated from the point of view of the behavior of nascent cavitation bubbles. Shadowgraphs of nascent bubbles generated by pulsed laser irradiation of Cu targets in water were observed for two different pulse widths, 20 ns and 150 ns. It is clearly seen that the nascent bubble is formed at the leading edge of the laser pulse profile, regardless of the pulse width. Bubbles generated by a 20-ns pulse are characterized by a flat-shape filled with dense matter with intense optical emission, which is in contrast to more hemispherical low-density bubbles observed under the irradiation by a 150-ns pulse. The behavior of the nascent bubbles is consistent with the behavior of the later plasma in the bubbles, which is crucial for observation of well-defined atomic spectral lines for underwater LIBS. |
著作権等: | © 2014 Elsevier B.V. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/188901 |
DOI(出版社版): | 10.1016/j.sab.2014.05.009 |
出現コレクション: | 学術雑誌掲載論文等 |
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