Abstract

Hydrogen emission has been studied in laser plasmas by focusing a TEA CO₂ laser (10.6μm, 500 mJ, 200 ns) on various types of samples, such as glass, quartz, black plastic sheet, and oil on copper plate sub-target. It was found that H_α emission with a narrow spectral width occurs with high efficiency when the laser plasma is produced in the low-pressure region. On the contrary, the conventional well-known laser-induced breakdown spectroscopy (LIBS), which is usually carried out at atmospheric air pressure, cannot be applied to the analysis of hydrogen as an impurity. By combining low-pressure laser-induced plasma spectroscopy with laser surface cleaning, a preliminary quantitative analysis was made on zircaloy pipe samples intentionally doped with hydrogen. As a result, a good linear relationship was obtained between H_α emission intensity and its concentration.

Quantitative hydrogen analysis of zircaloy-4 in laser-induced breakdown spectroscopy with ambient helium gas

Muliadi Ramli, Ken-ichi Fukumoto, Hideaki Niki, Syahrun Nur Abdulmadjid, Nasrullah Idris, Tadashi Maruyama, Kiichiro Kagawa, May On Tjia, Marincan Pardede, Koo Hendrik Kurniawan, Rinda Hedwig, Zener Sukra Lie, Tjung Jie Lie, and Davy Putra Kurniawan
Appl. Opt. 46(34) 8298-8304 (2007)

Practical and highly sensitive elemental analysis for aqueous samples containing metal impurities employing electrodeposition on indium-tin oxide film samples and laser-induced shock wave plasma in low-pressure helium gas

Koo Hendrik Kurniawan, Marincan Pardede, Rinda Hedwig, Syahrun Nur Abdulmadjid, Kurnia Lahna, Nasrullah Idris, Eric Jobiliong, Hery Suyanto, Maria Margaretha Suliyanti, May On Tjia, Tjung Jie Lie, Zener Sukra Lie, Davy Putra Kurniawan, and Kiichiro Kagawa
Appl. Opt. 54(25) 7592-7597 (2015)

Application of picosecond laser-induced breakdown spectroscopy to quantitative analysis of boron in meatballs and other biological samples

Rinda Hedwig, Kurnia Lahna, Zener Sukra Lie, Marincan Pardede, Koo Hendrik Kurniawan, May On Tjia, and Kiichiro Kagawa
Appl. Opt. 55(32) 8986-8992 (2016)

Formation and emission characteristics of CN molecules in laser induced low pressure He plasma and its applications to N analysis in coal and fossilization study

Kurnia Lahna, Rinaldi Idroes, Nasrullah Idris, Syahrun Nur Abdulmadjid, Koo Hendrik Kurniawan, May On Tjia, Marincan Pardede, and Kiichiro Kagawa
Appl. Opt. 55(7) 1731-1737 (2016)

Direct evidence of laser-induced shock wave plasma from organic targets in low pressure He ambient gas, showing the effect of target hardness on its propagation speed and the resulted spectral performance

Kurnia Lahna, Marincan Pardede, Koo Hendrik Kurniawan, Kiichiro Kagawa, and May On Tjia
Appl. Opt. 56(36) 9876-9881 (2017)