Vertical flow chemical detection portal [electronic resource].
- Albuquerque, N.M. : Sandia Corporation, 1999.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Additional Creators:
- Sandia Corporation and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- A portal apparatus for screening objects or persons for the presence of trace amounts of chemical substances such as illicit drugs or explosives. The apparatus has a test space, in which a person may stand, defined by two generally upright sides spanned by a horizontal transom. One or more fans in the transom generate a downward air flow (uni-directional) within the test space. The air flows downwardly from a high pressure upper zone, past the object or person to be screened. Air moving past the object dislodges from the surface thereof both volatile and nonvolatile particles of the target substance. The particles are entrained into the air flow which continues flowing downward to a lower zone of reduced pressure, where the particle-bearing air stream is directed out of the test space and toward preconcentrator and detection components. The sides of the portal are specially configured to partially contain and maintain the air flow.
- Report Numbers:
- E 1.99:us 5915268
- Other Subject(s):
- Vertical Flow Chemical Detection Portal Portal Apparatus Screening Persons Presence Trace Amounts Chemical Substances Illicit Drugs Explosives Apparatus Space Person Stand Defined Upright Spanned Horizontal Transom Fans Transom Generate Downward Air Flow Uni-Directional Space Air Flows Downwardly Pressure Upper Zone Past Person Screened Air Moving Past Dislodges Surface Volatile Nonvolatile Particles Target Substance Particles Entrained Air Flow Continues Flowing Downward Zone Reduced Pressure Particle-Bearing Air Stream Directed Space Preconcentrator Detection Components Portal Specially Configured Partially Contain Maintain Air Flow Upper Zone Air Flows Reduced Pressure Air Stream Air Flow Air Flow Air Flow Air Flow Chemical Substance Trace Amounts Trace Amount Flows Downwardly Air Moving Chemical Detection Vertical Flow Flowing Downward
- Published through SciTech Connect.
Conrad, Frank James; Linker, Kevin L.; Hannum, David W.
- Funding Information:
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