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You searched on: Author: Robert Fletcher

Displaying records 1 to 10 of 41 records.
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1. Chapter 21 Calibration of Aerosol Instruments
Report Number: 0581
Published: 7/5/2011
Authors: Bean T. Chen, Robert A Fletcher, Yung-Sung Cheng
Abstract: This chapter reviews calibration techniques relevant to aerosol measurement devices, such as sizing instruments, condensation nuclei counters, and mass monitors. The generation methods for test aerosols and important parameters in instrument calibra ...

2. Microscopy and Microanalysis of Individual Collected Particles- Chapter 10
Published: 7/5/2011
Authors: Robert A Fletcher, Nicholas W m Ritchie, Ian M. Anderson, John A Small
Abstract: This chapter describes microscopy and microanalysis techniques used for the characterization of collected, individual particles in a variety of instruments. The instruments discussed are the light microscope, electron microscopes (both scanning and ...

3. Application of Inkjet Printing Technology to Produce Test Materials of 1,3,5-Trinitro-1,3,5 Triazcyclohexane for Trace Explosive Analysis
Published: 10/15/2010
Authors: Eric S Windsor, Marcela Najarro Najarro, Anna N. Bloom, Bruce A Benner Jr, Robert A Fletcher, John G Gillen, Richard Lareau, Inho Cho, Mike Boldmand
Abstract: The feasibility of using piezoelectric drop-on-demand inkjet printing to prepare test materials for trace explosive analysis is demonstrated. Both pure high explosives and plastic-bonded putty explosives were formulated into inkjet printable solut ...

4. Production and Characterization of Polymer Microspheres Containing Trace Explosives Using Precision Particle Fabrication Technology
Report Number: 902104
Published: 8/2/2010
Authors: Matthew E Staymates, Robert A Fletcher, Jessica L Staymates, John G Gillen, Cory Berkland
Abstract: Well characterized test materials are essential for validating the performance of current trace explosive detection systems. These test materials must replicate trace explosive contamination in the form of small particles with characteristic diameter ...

5. Flow Visualization Techniques for the Evaluation of Non-Contact Trace Contraband Detectors
Published: 8/1/2010
Authors: Matthew E Staymates, Wayne Smith, John G Gillen, Richard T. Lareau, Robert A Fletcher
Abstract: Efforts are underway in the Surface and Microanalysis Science Division at the National Institute of Standards and Technology to study trace aerodynamic sampling of explosive particles using walk-through portal-based detection systems. Explosive trace ...

6. Calibration of a Condensation Particle Counter Using a NIST Traceable Method
Published: 1/1/2009
Authors: Robert A Fletcher, Michael R Winchester, George William Mulholland, R Lance King, D Klinedinst

7. Measurements of Air Jet Removal Efficiencies of Spherical Particles from Cloth and Planar Surfaces
Published: 12/1/2008
Authors: Robert A Fletcher, Nathanael Briggs, Erin Ferguson, John G Gillen
Abstract: Experiments were conducted to determine particle removal efficiencies from surfaces due to air jet impingement. We utilize monodisperse fluorescent polymer spheres ranging from 1 μm to 45 μm diameter distributed on polycarbonate surfaces ...

8. Method to Determine Collection Efficiency of Particles by Swipe Sampling
Published: 9/1/2008
Authors: Jennifer R Verkouteren, Jessica L Staymates, Robert A Fletcher, Wayne Smith, George A Klouda, John G Gillen
Abstract: A methodology was developed to evaluate particle collection efficiencies from swipe sampling of trace residues. Swipe sampling is used for many applications where trace residues must be collected, including the evaluation of radioactive particle con ...

9. Measurements of Air Jet Induced Release Rates of Spherical Particles from Cloth and Planar Surfaces
Published: 8/11/2008
Authors: Robert A Fletcher, Erin Ferguson, Nathanael Briggs, John G Gillen
Abstract: Experiments were conducted to determine particle release rates from surfaces due to air jet impingement. We utilize monodisperse fluorescent polymer spheres ranging from 1m to 45m diameter distributed on polycarbonate surfaces and muslin cloth. Parti ...

10. Fabrication of Polymer Microsphere Particle Standards Containing Trace Explosives Using an Oil/Water Emulsion Solvent Extraction Piezoelectric Printing Process
Published: 8/1/2008
Authors: Robert A Fletcher, J Brazin, Matthew E Staymates, Bruce A Benner Jr, John G Gillen

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  • SP 250-XX: Calibration Services
  • SP 260-XX: Standard Reference Materials
  • SP 300-XX: Precision Measurement and Calibration
  • SP 400-XX: Semiconductor Measurement Technology
  • SP 480-XX: Law Enforcement Technology
  • SP 500-XX: Computer Systems Technology
  • SP 700-XX: Industrial Measurement Series
  • SP 800-XX: Computer Security Series
  • SP 823-XX: Integrated Services Digital Network Series