| Autor: |
Collins GE; Naval Research Laboratory, 4555 Overlook Avenue, Southwest, Washington, D.C. 20375, USA., Malito MP; Nova Research, Inc., 1900 Elkin St., Suite 230, Alexandria, Virginia 22308, USA., Tamanaha CR; Naval Research Laboratory, 4555 Overlook Avenue, Southwest, Washington, D.C. 20375, USA., Hammond MH; Naval Research Laboratory, 4555 Overlook Avenue, Southwest, Washington, D.C. 20375, USA., Giordano BC; Naval Research Laboratory, 4555 Overlook Avenue, Southwest, Washington, D.C. 20375, USA., Lubrano AL; Nova Research, Inc., 1900 Elkin St., Suite 230, Alexandria, Virginia 22308, USA., Field CR; Naval Research Laboratory, 4555 Overlook Avenue, Southwest, Washington, D.C. 20375, USA., Rogers DA; Naval Research Laboratory, 4555 Overlook Avenue, Southwest, Washington, D.C. 20375, USA., Jeffries RA; Nova Research, Inc., 1900 Elkin St., Suite 230, Alexandria, Virginia 22308, USA., Colton RJ; Naval Research Laboratory, 4555 Overlook Avenue, Southwest, Washington, D.C. 20375, USA., Rose-Pehrsson SL; Naval Research Laboratory, 4555 Overlook Avenue, Southwest, Washington, D.C. 20375, USA. |
| Abstrakt: |
A novel vapor delivery testbed, referred to as the Trace Explosives Sensor Testbed, or TESTbed, is demonstrated that is amenable to both high- and low-volatility explosives vapors including nitromethane, nitroglycerine, ethylene glycol dinitrate, triacetone triperoxide, 2,4,6-trinitrotoluene, pentaerythritol tetranitrate, and hexahydro-1,3,5-trinitro-1,3,5-triazine. The TESTbed incorporates a six-port dual-line manifold system allowing for rapid actuation between a dedicated clean air source and a trace explosives vapor source. Explosives and explosives-related vapors can be sourced through a number of means including gas cylinders, permeation tube ovens, dynamic headspace chambers, and a Pneumatically Modulated Liquid Delivery System coupled to a perfluoroalkoxy total-consumption microflow nebulizer. Key features of the TESTbed include continuous and pulseless control of trace vapor concentrations with wide dynamic range of concentration generation, six sampling ports with reproducible vapor profile outputs, limited low-volatility explosives adsorption to the manifold surface, temperature and humidity control of the vapor stream, and a graphical user interface for system operation and testing protocol implementation. |
