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Title: Signal enhancement of neutral He emission lines by fast electron bombardment of laser-induced He plasma

Abstract

A time-resolved spectroscopic study is performed on the enhancement signals of He gas plasma emission using nanosecond (ns) and picosecond (ps) lasers in an orthogonal configuration. The ns laser is used for the He gas plasma generation and the ps laser is employed for the ejection of fast electrons from a metal target, which serves to excite subsequently the He atoms in the plasma. The study is focused on the most dominant He I 587.6 nm and He I 667.8 nm emission lines suggested to be responsible for the He-assisted excitation (HAE) mechanism. The time-dependent intensity enhancements induced by the fast electrons generated with a series of delayed ps laser ablations are deduced from the intensity time profiles of both He emission lines. The results clearly lead to the conclusion that the metastable excited triplet He atoms are actually the species overwhelmingly produced during the recombination process in the ns laser-induced He gas plasma. These metastable He atoms are believed to serve as the major energy source for the delayed excitation of analyte atoms in ns laser-induced breakdown spectroscopy (LIBS) using He ambient gas.

Authors:
 [1];  [2];  [3];  [4];  [5]; ;  [6];  [7];  [6];  [8];  [6];  [9]
  1. Department of Physics, Faculty of Mathematics and Natural Sciences, Udayana University, Kampus Bukit Jimbaran, Denpasar 80361, Bali (Indonesia)
  2. Department of Electrical Engineering, University of Pelita Harapan, 1100 M.H. Thamrin Boulevard, Lippo Village, Tangerang 15811 (Indonesia)
  3. Department of Computer Engineering, Bina Nusantara University, 9 K.H. Syahdan, Jakarta 14810 (Indonesia)
  4. Department of Physics, Faculty of Mathematics and Natural Sciences, Jakarta State University, Rawamangun, Jakarta 12440 (Indonesia)
  5. Department of Chemistry, Faculty of Mathematics and Natural Sciences, Syiah Kuala University, Darussalam, Banda Aceh 23111, NAD (Indonesia)
  6. Research Center of Maju Makmur Mandiri Foundation, 40 Srengseng Raya, Kembangan, Jakarta Barat 11630 (Indonesia)
  7. Department of Physics, Faculty of Mathematics and Natural Sciences, Syiah Kuala University, Darussalam, Banda Aceh 23111, NAD (Indonesia)
  8. (Indonesia)
  9. (Japan)
Publication Date:
OSTI Identifier:
22611416
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 6; Journal Issue: 8; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABLATION; BREAKDOWN; ELECTRON BEAMS; EMISSION; ENERGY SOURCES; EXCITATION; HELIUM; LASER-PRODUCED PLASMA; RECOMBINATION; SPECTROSCOPY; TIME DEPENDENCE; TIME RESOLUTION

Citation Formats

Suyanto, Hery, Pardede, Marincan, Hedwig, Rinda, Marpaung, Alion Mangasi, Ramli, Muliadi, Lie, Tjung Jie, Kurniawan, Koo Hendrik, E-mail: kurnia18@cbn.net.id, Abdulmadjid, Syahrun Nur, Tjia, May On, Physics of Magnetism and Photonics Group, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, 10 Ganesha,Bandung 40132, Kagawa, Kiichiro, and Fukui Science Education Academy, Takagi Chuo 2 chome, Fukui 910-0804. Signal enhancement of neutral He emission lines by fast electron bombardment of laser-induced He plasma. United States: N. p., 2016. Web. doi:10.1063/1.4960991.
Suyanto, Hery, Pardede, Marincan, Hedwig, Rinda, Marpaung, Alion Mangasi, Ramli, Muliadi, Lie, Tjung Jie, Kurniawan, Koo Hendrik, E-mail: kurnia18@cbn.net.id, Abdulmadjid, Syahrun Nur, Tjia, May On, Physics of Magnetism and Photonics Group, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, 10 Ganesha,Bandung 40132, Kagawa, Kiichiro, & Fukui Science Education Academy, Takagi Chuo 2 chome, Fukui 910-0804. Signal enhancement of neutral He emission lines by fast electron bombardment of laser-induced He plasma. United States. doi:10.1063/1.4960991.
Suyanto, Hery, Pardede, Marincan, Hedwig, Rinda, Marpaung, Alion Mangasi, Ramli, Muliadi, Lie, Tjung Jie, Kurniawan, Koo Hendrik, E-mail: kurnia18@cbn.net.id, Abdulmadjid, Syahrun Nur, Tjia, May On, Physics of Magnetism and Photonics Group, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, 10 Ganesha,Bandung 40132, Kagawa, Kiichiro, and Fukui Science Education Academy, Takagi Chuo 2 chome, Fukui 910-0804. Mon . "Signal enhancement of neutral He emission lines by fast electron bombardment of laser-induced He plasma". United States. doi:10.1063/1.4960991.
@article{osti_22611416,
title = {Signal enhancement of neutral He emission lines by fast electron bombardment of laser-induced He plasma},
author = {Suyanto, Hery and Pardede, Marincan and Hedwig, Rinda and Marpaung, Alion Mangasi and Ramli, Muliadi and Lie, Tjung Jie and Kurniawan, Koo Hendrik, E-mail: kurnia18@cbn.net.id and Abdulmadjid, Syahrun Nur and Tjia, May On and Physics of Magnetism and Photonics Group, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, 10 Ganesha,Bandung 40132 and Kagawa, Kiichiro and Fukui Science Education Academy, Takagi Chuo 2 chome, Fukui 910-0804},
abstractNote = {A time-resolved spectroscopic study is performed on the enhancement signals of He gas plasma emission using nanosecond (ns) and picosecond (ps) lasers in an orthogonal configuration. The ns laser is used for the He gas plasma generation and the ps laser is employed for the ejection of fast electrons from a metal target, which serves to excite subsequently the He atoms in the plasma. The study is focused on the most dominant He I 587.6 nm and He I 667.8 nm emission lines suggested to be responsible for the He-assisted excitation (HAE) mechanism. The time-dependent intensity enhancements induced by the fast electrons generated with a series of delayed ps laser ablations are deduced from the intensity time profiles of both He emission lines. The results clearly lead to the conclusion that the metastable excited triplet He atoms are actually the species overwhelmingly produced during the recombination process in the ns laser-induced He gas plasma. These metastable He atoms are believed to serve as the major energy source for the delayed excitation of analyte atoms in ns laser-induced breakdown spectroscopy (LIBS) using He ambient gas.},
doi = {10.1063/1.4960991},
journal = {AIP Advances},
number = 8,
volume = 6,
place = {United States},
year = {Mon Aug 15 00:00:00 EDT 2016},
month = {Mon Aug 15 00:00:00 EDT 2016}
}