Dependence of Charge Current Induced by Nd-YAG Laser Bombardment on Surrounding Gas Pressure and Laser Pulse Energy

元データ 2004-11-15 Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physics

概要

Charge current detection was carried out to study the excitation process of ablated atoms by the irradiation of a Q-sw Nd-YAG laser pulse (1064 nm, 8 ns, 5-116 mJ pulse energy) on a zinc target in a surrounding gas of air and helium in the pressure range from 1 to 760 Torr. For this purpose, a partially transmitted metal mesh electrode was placed in front of the target at 5 mm from the target surface with a supply DC voltage of 0–400 V. It was demonstrated that Zn atomic emission characteristics remain unchanged regardless of the supplied voltage. Also, it was proved that the pressure dependence of charge current and that of Zn atomic emission have no systematic correlation. These facts have led us to conclude that the electron-collision model or electron–ion recombination model is not a good explanation for the excitation process of ablated atoms for a Zn sample, while the shock-wave model is most plausible.

著者

Lie Tjung Research Centre Of Maju Makmur Mandiri Foundation
Kurniawan Koo Research Center of Maju Makmur Mandiri Foundation
Kagawa Kiichiro Department Of Fiber Amenity Engineering Graduate School Of Engineering Fukui University
PARDEDE Marincan Department of Electronic Engineering, Faculty of Industrial Technique, Pelita Harapan University
LEE Yong Physics Department, Chonbuk National University
Tjia May Department Of Physics Faculty Of Mathematics And Natural Sciences Bandung Institute Of Technology
Lee Yong Physics Department, Chonbuk National University, Chonju 561-756, Korea
Lie Tjung Research Center of Maju Makmur Mandiri Foundation, 40 Srengseng Raya, Kembangan, Jakarta Barat 11630, Indonesia
Kagawa Kiichiro Department of Physics, Faculty of Education and Regional Studies, The University of Fukui, Fukui 910-8507, Japan
Kurniawan Koo Research Center of Maju Makmur Mandiri Foundation, 40 Srengseng Raya, Kembangan, Jakarta Barat 11630, Indonesia
Pardede Marincan Department of Electronic Engineering, Faculty of Industrial Technique, University of Pelita Harapan, UPH Tower Lippo Karawaci, Tangerang 15810, Indonesia
Tjia May Department of Physics, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, 10 Ganesha, Bandung, Indonesia

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