Accession Number:

ADA503516

Title:

A Laser-Based Sensor for Ambient Detection of RDX and TNT

Descriptive Note:

Conference paper

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Report Date:

2008-12-01

Pagination or Media Count:

6.0

Abstract:

We detect trace residues of RDX and TNT by surface photofragmentation - fragment detection in real time at ambient conditions. An infrared or visible laser generates signature, NO molecular fragments, and a second, low energy, ultraviolet laser facilitates their detection by resonance enhanced multiphoton ionization. We present the effects of pump laser wavelength, laser energy, delay timing between the pump and probe beams, and analyze concentration on signal intensity. Sensitivity analyses yield RDX and TNT detection limits in the low nanogramsquare centimeter. The detection of energetic materials is a serious concern in the war on terror, either on the war front or in our homeland. With the widespread use of improvised explosive devices and the increased potential for homeland attack, a sensor that detects energetic materials that is robust, accurate, and easy to deploy would undoubtedly reduce the risk to warfighters and civilians. As a result, there has been much interest in developing such a sensor.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Military Operations, Strategy and Tactics
  • Miscellaneous Detection and Detectors
  • Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE