Effect of Atmosphere on Collinear Double-Pulse Laser-Induced Breakdown Spectroscopy

Journal Article · Fri Jul 01 04:00:00 EDT 2011 · Analytical and Bioanalytical Chemistry

DOI:https://doi.org/10.1007/s00216-011-5034-z· OSTI ID:1035917

Effenberger, Jr, Andrew J; Scott, Jill R

Double pulse laser induced breakdown spectroscopy (DP-LIBS) has been shown to enhance LIBS spectra. Several researches have reported significant increases in signal-to-noise and or spectral intensity. In addition to DP-LIBS, atmospheric conditions can also increase spectra intensity. For example, He and Ar both increase LIBS intensity compared to air at one 1 atm. It was also found that as the pressure was decreased to 100 Torr, LIBS intensity increased in Ar and air for single pulse (SP) LIBS. In this study, a collinear DP-LIBS scheme is used along with manipulation of the atmospheric conditions. The DP-LIBS scheme consists of a 355 nm ablative pulse fired into a sample contained in a vacuum chamber. A second analytical 1064 nm pulse is then fired 100 ns to 10 {micro}s after and along the same path of the first pulse. Ar, He and air at pressures ranging from atmospheric pressure (630 Torr at elevation) to 10{sup -5} Torr are introduced during DP-LIBS and SP-LIBS experiments. For a brass sample, a significant increase in spectral intensity of Cu and Zn lines were observed in DP-LIBS under Ar compared to DP-LIBS in air. It was also found that Cu and Zn lines acquired with SP-LIBS in Ar are nearly as intense as DP-LIBS in air. Signal-to-noise for lines from various samples will be reported for both DP-LIBS and SP-LIBS in Ar, He, and air at pressures ranging from 630 Torr to 10{sup -5} Torr.

• Research Organization: Idaho National Laboratory (INL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC07-05ID14517
• OSTI ID: 1035917
• Report Number(s): INL/JOU-10-18956
• Journal Information: Analytical and Bioanalytical Chemistry, Journal Name: Analytical and Bioanalytical Chemistry Journal Issue: 10 Vol. 400; ISSN 1618-2642
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
47 OTHER INSTRUMENTATION
AIR
ATMOSPHERIC PRESSURE
Argon
Atmosphere
BRASS
BREAKDOWN
Double Pulse
Helium
LASERS
LIBS
SPECTRA
SPECTROSCOPY
Single Pulse