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Proceedings Paper

Photon-counting spectrometer for elemental analysis using LIBS
Author(s): David Taylor; Richard Myers; Arieh M. Karger
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Paper 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.

Paper Details

Date Published: 25 July 2003
PDF: 5 pages
Proc. SPIE 4878, First Jet Propulsion Laboratory In Situ Instruments Workshop, (25 July 2003); doi: 10.1117/12.520578
Show Author Affiliations
David Taylor, Radiation Monitoring Devices, Inc. (United States)
Richard Myers, Radiation Monitoring Devices, Inc. (United States)
Arieh M. Karger, Radiation Monitoring Devices, Inc. (United States)

Published in SPIE Proceedings Vol. 4878:
First Jet Propulsion Laboratory In Situ Instruments Workshop
Gregory H. Bearman; Patricia M. Beauchamp, Editor(s)

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