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Proceedings Paper

HFEMI data from carbon rods, wires, and improvised explosive device constituent parts
Author(s): Benjamin E. Barrowes; Danney Glaser; Mikheil Prishvin; Guy Jutras; Kevin O'Neill; Fridon Shubitidze
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Paper Abstract

High-frequency electromagnetic induction (HFEMI) extends the established EMI frequency range above 100 kHz to perhaps 20 MHz. In this higher frequency range, less-conductive targets display heretofore unseen responses in their inphase and quadrature components. Improvised explosive device constituent parts, such as carbon rods, small pressure plates, conductivity voids, low metal content mines, and short wires respond to HFEMI but not to traditional EMI. Results from recent testing over mock-ups of less conductive IEDs or their components show distinctive HFEMI responses, suggesting that this new sensing realm could augment the detection and discrimination capability of established EMI technology. The electrical conductivity of soil may contribute, in effect, to the imaginary part of the permittivity of soil and may then, in turn, generate perceptible responses in traditional EMI. In HFEMI, both the real and complete imaginary parts of soil permittivity produce notable effects. Pursuing this, lab tests with tap water and variously saturated Ottawa sand were compared with results from time domain reflectometry.

Paper Details

Date Published: 10 May 2019
PDF: 8 pages
Proc. SPIE 11012, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXIV, 110120Q (10 May 2019); doi: 10.1117/12.2519048
Show Author Affiliations
Benjamin E. Barrowes, U.S. Army Engineer Research and Development Ctr. (United States)
Danney Glaser, U.S. Army Engineer Research and Development Ctr. (United States)
Mikheil Prishvin, Dartmouth College (United States)
Guy Jutras, Geophex, Ltd. (United States)
Kevin O'Neill, Dartmouth College (United States)
Fridon Shubitidze, Dartmouth College (United States)

Published in SPIE Proceedings Vol. 11012:
Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXIV
Steven S. Bishop; Jason C. Isaacs, Editor(s)

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