Experimental investigation and modelling of double pulse laser induced plasma spectroscopy under water |
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| Institution: | 1. Department of Chemistry, University of Bari, Via Orabona 4, 70125 Bari, Italy;2. CNR-IMIP, Via Amendola 122, 70126 Bari, Italy;3. CNR-ICCOM, Via Moruzzi 1, 56124 Pisa, Italy;4. University of Tennessee Space Institute, 411 B.H. Parkway, Tullahoma, TN 37388-9700, USA;1. National Energy Technology Laboratory, U.S. Department of Energy, Pittsburgh, PA 15236, USA;2. Department of Physics and Astronomy, Mississippi State University, Mississippi State, MS 39762, USA;3. National Energy Technology Laboratory, AECOM Technology Corporation, Pittsburgh, PA 15236, USA;1. China State Key Lab of Power System, Department of Energy and Power Engineering, Tsinghua-BP Clean Energy Centre, Tsinghua University, Beijing 100084, China;2. Department of Physics, Mirpur University of Science & Technology (MUST), Mirpur AJK-10250, Pakistan;3. National Centre for Physics, Quaid-i-Azam University Islamabad, Pakistan |
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| Abstract: | In this paper the double pulse laser induced breakdown spectroscopy (LIBS) under water has been investigated both theoretically and experimentally. The laser induced bubble, produced by the first pulse, has been simulated by a theoretical model to clarify the effect of inter-pulse delay on the second pulse LIBS spectrum peculiarities. By experiments and calculations it has been established that the dynamics of the plasma obtained by double pulse LIBS is strongly affected by the chemical reactions between the plasma particles and the background environment inside the bubble which seems to be the main effect in confining the plasma. |
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