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

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概要

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• 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.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2004-11-15

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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