title: Stabilization of the spark-discharge point on a sample surface by laser irradiation for steel analysis.
abstract: A combined technique with laser irradiation is suggested to control spark discharge for analytical use, having a unique feature that firing points of the spark discharge can be fixed by laser irradiation. Because the spark discharge easily initiates at particular surface sites, such as non-metallic inclusions, called selective discharge, the concentration of some elements sometimes deviates from their average one in spark discharge optical emission spectrometry. Therefore, stabilization of firing points on a sample surface could improve the analytical precision.
authors.affiliation: Institute for Materials Research, Tohoku University, Sendai, Japan. matsuta@imr.tohoku.ac.jp
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Matsuta
authors.forename: Kuniyuki
authors.initials: K
authors.lastname: Kitagawa
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Wagatsuma