Double pulse laser ablation and plasma: Laser induced breakdown spectroscopy signal enhancement |
| |
| Institution: | 1. Embrapa Instrumentation, P.O. Box 741, 13561-206 São Carlos, SP, Brazil.;2. CNR, Istituto di Nanotecnologia (NANOTEC) – PLasMI Lab, Bari, 70126 Bari, Italy;3. Instituto de Física, Universidade Federal do Mato Grosso do Sul, P.O. Box 549, 79070-900 Campo Grande, MS, Brazil;4. Embrapa Solos, Rua Jardim Botânico 1024, 22460-000 Rio de Janeiro, RJ, Brazil;5. Embrapa Pecuária Sudeste, P.O. Box 741, 13560-970 São Carlos, SP, Brazil;1. Embrapa Instrumentation, Rua XV de Novembro, 1452, CEP 13560-970 São Carlos, SP, Brazil;2. Institute of Inorganic Methodologies and Plasmas, CNR, Bari, 70126 Bari, Italy;3. Physics Institute of São Carlos, University of São Paulo, IFSC-USP, Av. Trabalhador são-carlense, 400 Pq. Arnold Schimid, 13566-590 São Carlos, SP, Brazil;1. Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan;2. Department of Materials Science and Engineering, Graduate School of Engineering, Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto 606-8501, Japan;3. Institute of Industrial Science, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8505, Japan;1. MAF-IIC, Memorial University of Newfoundland, Bruneau Centre, St. John''s, NL, A1C 5S7, Canada;2. Institut Lumière Matière, UMR5306 Université Lyon 1-CNRS, Université de Lyon 69622 Villeurbanne cedex, France;3. Optical Science Center for Applied Research, Delaware State University, Dover, DE, USA;4. Department of Chemistry, University of Bari, Via Orabona 4, 70125 Bari, Italy;5. CNR-NANOTEC, Via Amendola 122/D, 70126 Bari, Italy |
| |
| Abstract: | A review of recent results of the studies of double laser pulse plasma and ablation for laser induced breakdown spectroscopy applications is presented. The double pulse laser induced breakdown spectroscopy configuration was suggested with the aim of overcoming the sensitivity shortcomings of the conventional single pulse laser induced breakdown spectroscopy technique. Several configurations have been suggested for the realization of the double pulse laser induced breakdown spectroscopy technique: collinear, orthogonal pre-spark, orthogonal pre-heating and dual pulse crossed beam modes. In addition, combinations of laser pulses with different wavelengths, different energies and durations were studied, thus providing flexibility in the choice of wavelength, pulse width, energy and pulse sequence. The double pulse laser induced breakdown spectroscopy approach provides a significant enhancement in the intensity of laser induced breakdown spectroscopy emission lines up to two orders of magnitude greater than a conventional single pulse laser induced breakdown spectroscopy. The double pulse technique leads to a better coupling of the laser beam with the plasma plume and target material, thus providing a more temporally effective energy delivery to the plasma and target. The experimental results demonstrate that the maximum effect is obtained at some optimum separation delay time between pulses. The optimum value of the interpulse delay depends on several factors, such as the target material, the energy level of excited states responsible for the emission, and the type of enhancement process considered. Depending on the specified parameter, the enhancement effects were observed on different time scales ranging from the picosecond time level (e.g., ion yield, ablation mass) up to the hundred microsecond level (e.g., increased emission intensity for laser induced breakdown spectroscopy of submerged metal target in water). Several suggestions have been proposed to explain the mechanism of double pulse enhancement. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
