Short-Range Bioaerosol LIDAR Detection: Transmitter Design and Sensitivity Analysis

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Authors
  1. Simard, J-R.
Corporate Authors
Defence R&D Canada - Valcartier, Valcartier QUE (CAN)
Abstract
With the decline of the traditional worldwide balance of power between the major alliances since the early 1990s, and the concurrent rise of asymmetric threats, biological warfare has been identified as and still is one of the threats for which adequate defences are the most challenging. One recently identified need is a short-range volumetric bioaerosol sensor capable of monitoring large indoor or semi-enclosed outdoor spaces. In response to this interest, DRDC – Valcartier investigated the potential of a miniature inelastic short-range LIDAR (the Short-Range BioSpectra concept). In addition to addressing the identified deficiencies, this device would also accelerate the potential assessment of classifying biological aerosols from the spectral information contained in their induced fluorescence. In this study, several modelling considerations necessary for an efficient short-range LIDAR transmitter design are reported. From this model, the present state of the technologies and previously obtained scattering properties of a bioaerosol simulant (BG), sensitivities varying from less than 1 to about 80 ACPLA, are anticipated for ranges varying from 5 to 50 metres and collecting apertures of 5, 10, 15 and 20 cm in diameter. This level of sensitivity is obtained for probed range intervals of less than .5 m to over 30 m and delimiting atmospheric volumes varying from a fraction of a millilitre up to 60 mL. These results are supplemented with discussions on issues like the limit o

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Report Number
DRDC-VALCARTIER-TM-2005-303 — Technical Memorandum
Date of publication
01 Aug 2006
Number of Pages
58
DSTKIM No
CA027839
CANDIS No
525704
Format(s):
CD ROM

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