The Effect of Selective Vaporization on TEA CO2 Laser Induced Shock Wave Plasma.

• KURNIAWAN Hendrik

  Applied Spectroscopy Laboratory, Graduate Program in Optoelectronics and Laser Application, The University of Indonesia

• PARDEDE Marincan

  Applied Spectroscopy Laboratory, Graduate Program in Optoelectronics and Laser Application, The University of Indonesia

• KAGAWA Kiichiro

  Department of Physics, Faculty of Education, Fukui University

• TJIA May On

  Department of Physics, Faculty of Science and Mathematics, Bandung Institute of Technology

Bibliographic Information

Other Title

• Effect of Selective Vaporization on TEA

Abstract

TEA CO₂ laser (130mJ, 100ns) and Nd-YAG laser (50mJ, 8ns) pulses were employed to generate secondary plasma from brass samples in air under a reduced pressure of 1 Torr. The vaporization effects on Zn and Cu were studied in terms of their emission characteristics for the two cases. In the case of TEA CO₂ laser, the emission intensities of copper spectral lines are extremely low, compared to the zinc spectral lines, indicating a highly selective-vaporization effect. The time-profiles of the emission intensities of ZnI 481.0nm and CuI 327.4nm spectral lines observed near the target surface clearly showed that vaporization of Cu atoms occurred later and continued for a long time at a relatively low gushing speed, while the vaporization of Zn atoms took place sooner with a higher gushing speed. It was shown that only Zn atoms form a shock front, and Cu atoms are left behind the shock-wave and are not excited. This selective vaporization process does not occur at a laser power density considerably higher than the threshold for the plasma generation as demonstrated by the use of Nd-YAG laser of higher power density. This phenomenon of selective vaporization described in the present paper also supports our laser-induced shock wave model.

Journal

• Journal of the Spectroscopical Society of Japan

  Journal of the Spectroscopical Society of Japan 47 (5), 220-227, 1998

  The Spectroscopical Society of Japan

Keywords

• selective vaporization
• TEA CO<SUB>2</SUB> laser induced plasma
• shock wave induced plasma
• laser microprobe analyzer
• brass target

Details

• CRID: 1390001206258774912
• NII Article ID: 10002582408
• NII Book ID: AN00222531
• DOI: 10.5111/bunkou.47.220
• ISSN: 18846785
• ISSN: 00387002
• NDL BIB ID: 4586115
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4586115
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed