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Optical detection of chemical warfare agents and toxic industrial chemicals: Simulation
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10.1063/1.1900931
/content/aip/journal/jap/97/11/10.1063/1.1900931
http://aip.metastore.ingenta.com/content/aip/journal/jap/97/11/10.1063/1.1900931

Figures

Image of FIG. 1.
FIG. 1.

(Color) Infrared-absorption spectra for CWAs, mustards, and TNT.

Image of FIG. 2.
FIG. 2.

IR-absorption spectra of VX and a potentially interfering species, butyl acetate.

Image of FIG. 3.
FIG. 3.

(Color) Spectra of nerve agents and and laser wavelengths

Image of FIG. 4.
FIG. 4.

Histogram of simulations of 10-ppbv DIMP detection in contaminated air overlaid with the histogram from simulated measurements of 10-ppbv DIMP in clean, dry air.

Image of FIG. 5.
FIG. 5.

Simulated sensor response to 0-ppb DIMP in contaminated air. The PFP for an alarm threshold of 1.5 ppb is the area divided by the sum of areas and .

Image of FIG. 6.
FIG. 6.

Plot of PFP vs detection threshold for detecting DIMP from simulated measurements of heavily contaminated air with , 4% , and 550-ppm (a total of 45 interferents) and using 87 laser lines from a laser. A PFP of is achieved for a detection threshold of 4.15 ppb.

Image of FIG. 7.
FIG. 7.

Simulated sensor response to 2-ppb DIMP in contaminated air. The PFN obtained by analyzing the number of sensor readings that are below a particular alarm threshold even though DIMP is present at higher concentrations.

Image of FIG. 8.
FIG. 8.

(Color) Plot of PFP and PFN vs detection threshold for detecting DIMP from simulated measurements of heavily contaminated air with , 4% , and 550-ppm (a total of 45 interferents) and using 87 laser lines from a laser.

Image of FIG. 9.
FIG. 9.

(Color) Simulated ROC curves illustrating improvement in the PFP of L-PAS detection with improving the precision of the sensor.

Image of FIG. 10.
FIG. 10.

(Color) Simulations demonstrating the impact of reducing contamination on the performance of the sensor. Typical indoor air has a total VOC (TVOC) density of .

Image of FIG. 11.
FIG. 11.

(Color) Performance improvement of the L-PAS sensor by increasing the density of sampling wavelengths.

Tables

Generic image for table
Table I.

CWAs, TICs, and explosives that can be detected in specific spectral regions.

Generic image for table
Table II.

Summary of allowable sarin dose (Ref. 3) for different health effects.

Generic image for table
Table III.

L-PAS sensor interference list.

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/content/aip/journal/jap/97/11/10.1063/1.1900931
2005-05-23
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Optical detection of chemical warfare agents and toxic industrial chemicals: Simulation
http://aip.metastore.ingenta.com/content/aip/journal/jap/97/11/10.1063/1.1900931
10.1063/1.1900931
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