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Title: Vertical flow chemical detection portal

Abstract

A portal apparatus is described 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. 3 figs.

Inventors:
; ;
Issue Date:
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6366899
Patent Number(s):
5915268 A
Application Number:
PPN: US 8-995777
Assignee:
Sandia Corp., Albuquerque, NM (United States) SNL; EDB-99-081382
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Resource Relation:
Patent File Date: 22 Dec 1997
Country of Publication:
United States
Language:
English
Subject:
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; AIR FLOW; CHEMICAL EXPLOSIVES; CONTAINERS; DESIGN; DETECTION; DRUGS; HUMAN POPULATIONS; MONITORING; SABOTAGE; SAMPLERS; SECURITY; EQUIPMENT; EXPLOSIVES; FLUID FLOW; GAS FLOW; POPULATIONS; 450000* - Military Technology, Weaponry, & National Defense

Citation Formats

Linker, K.L., Hannum, D.W., and Conrad, F.J. Vertical flow chemical detection portal. United States: N. p., 1999. Web.
Linker, K.L., Hannum, D.W., & Conrad, F.J. Vertical flow chemical detection portal. United States.
Linker, K.L., Hannum, D.W., and Conrad, F.J. Tue . "Vertical flow chemical detection portal". United States.
@article{osti_6366899,
title = {Vertical flow chemical detection portal},
author = {Linker, K.L. and Hannum, D.W. and Conrad, F.J.},
abstractNote = {A portal apparatus is described 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. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {6}
}