7 June 2017 Physical and environmental factors affecting the persistence of explosives particles (Conference Presentation)
Author Affiliations +
Abstract
Knowledge of the persistence of trace explosives materials is critical to aid the security community in designing detection methods and equipment. The physical and environmental factors affecting the lifetimes of particles include temperature, airflow, interparticle distance, adlayers, humidity, particle field size and vapor pressure. We are working towards a complete particle persistence model that captures the relative importance of these effects to allow the user, with known environmental conditions, to predict particle lifetimes for explosives or other chemicals. In this work, particles of explosives are sieved onto smooth glass substrates using particle sizes and loadings relevant to those deposited by fingerprint deposition. The coupon is introduced into a custom flow cell and monitored under controlled airflow, humidity and temperature. Photomicroscopy images of the sample taken at fixed time intervals are analyzed to monitor particle sublimation and characterized as a size-independent radial sublimation velocity for each particle in the ensemble. In this paper we build on previous work by comparing the relationship between sublimation of different materials and their vapor pressures. We also describe the influence of a sebum adlayer on particle sublimation, allowing us to better model ‘real world’ samples.
Conference Presentation
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michael R. Papantonakis, Michael R. Papantonakis, Viet K. Nguyen, Viet K. Nguyen, Robert Furstenberg, Robert Furstenberg, Caitlyn White, Caitlyn White, Melissa Shuey, Melissa Shuey, Christopher A. Kendziora, Christopher A. Kendziora, R. Andrew McGill, R. Andrew McGill, } "Physical and environmental factors affecting the persistence of explosives particles (Conference Presentation)", Proc. SPIE 10183, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVIII, 101830F (7 June 2017); doi: 10.1117/12.2262773; https://doi.org/10.1117/12.2262773
PROCEEDINGS
PRESENTATION ONLY


SHARE
RELATED CONTENT

Fate and effects of trace particulate explosives
Proceedings of SPIE (May 28 2014)
Persistence of explosives under real world conditions
Proceedings of SPIE (May 11 2016)
Particle size distribution of cocaine hydrochloride
Proceedings of SPIE (February 16 1997)
Binary texture estimation using linear samples
Proceedings of SPIE (March 26 1995)

Back to Top