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Proceedings Paper

Laser-induced breakdown spectroscopy based deminers' probe
Author(s): James Pierre Hauck; Mark Walker; Siavosh Hamadani; Natalie Bloomhardt; Justin Eagan
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Paper Abstract

We report on a prototype Laser Induced Breakdown Spectroscopy (LIBS) Deminers' Probe used to identify underground objects. We have built a prototype, and are in the process of developing a more advanced LIBS based Deminer' s Probe used to prod objects underground, and then sense them by creating a micro-plasma plume of the surface material and analyzing the spectrum of the emitted light to identify the object. It is expected that the Deminer will be able to eliminate many false positives, which consume most of the Deminers' time. SARA Fiber-Optics coupled LIBS system consists in a probe that can be inserted into the ground to provide a path for both the laser beam to the target, and for the micro-plasma plume fluorescence from the target to a spectrometer or spectrometers for analysis. The probe is closely modeled after the conventional Deminers' probe, resembling a saber. We have demonstrated that this simple system is capable of producing remarkably different spectra from different materials. Our next steps are to add a number of features to the Deminers' Probe. These include: a new optical configuration to increase the irradiance and fluence created by the pulsed laser at the target, a multiple channel fluorescence reception system that can increase the amount of light delivered to the spectrometers, a fluidic system to clear the detritus away from the probe tip, and a complete operational/control and readout system for the Deminer to use. Mine-lane tests are planned to be performed in the later part of 2009, or shortly thereafter.

Paper Details

Date Published: 4 May 2009
PDF: 9 pages
Proc. SPIE 7303, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XIV, 73031G (4 May 2009); doi: 10.1117/12.818878
Show Author Affiliations
James Pierre Hauck, Scientific Applications & Research Associates, Inc. (United States)
Mark Walker, Scientific Applications & Research Associates, Inc. (United States)
Siavosh Hamadani, Scientific Applications & Research Associates, Inc. (United States)
Natalie Bloomhardt, Scientific Applications & Research Associates, Inc. (United States)
Justin Eagan, Scientific Applications & Research Associates, Inc. (United States)


Published in SPIE Proceedings Vol. 7303:
Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XIV
Russell S. Harmon; J. Thomas Broach; John H. Holloway, Editor(s)

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