Photon-counting spectrometer for elemental analysis using LIBS

David Taylor; Richard Myers; Arieh M. Karger

doi:10.1117/12.520578

25 July 2003 Photon-counting spectrometer for elemental analysis using LIBS

David Taylor, Richard Myers, Arieh M. Karger

Proceedings Volume 4878, First Jet Propulsion Laboratory In Situ Instruments Workshop; (2003) https://doi.org/10.1117/12.520578
Event: First Jet Propulsion Laboratory In Situ Instruments Workshop, 2003, Bellingham, United States

Abstract

Avalanche Photodiode (APD) arrays are being applied to Laser-Induced Breakdown Spectroscopy (LIBS) for elemental analysis with standoff detection capability. This instrument, which represents a valuable addition to planetary rover missions as well as Earth-based applications, benefits from the advantages common to both Geiger-mode and proportional APDs, which are solid-state detectors with virtually single-photon sensitivity, higher quantum efficiency than photomultiplier tubes or intensified CCDs, and rapid sub-nanosecond response speed. We have demonstrated LIBS detectability better than 770 parts-per-billion of sodium utilizing the photon-counting Geiger-mode APD. In a LIBS system, an APD array offers the unparalleled prospect of selecting in each channel the most appropriate temporal window for detecting the target species. In real-time detection systems, such as microfluidics-based fluorescence detection of bacterial spores, these compact, robust APD arrays promise portable hand-held instruments that utilize tight optical coupling.

Citation Download Citation

David Taylor, Richard Myers, and Arieh M. Karger "Photon-counting spectrometer for elemental analysis using LIBS", Proc. SPIE 4878, First Jet Propulsion Laboratory In Situ Instruments Workshop, (25 July 2003); https://doi.org/10.1117/12.520578

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