Electromagnetic Modeling of Hot-Wire Detonators

An effort is underway to determine the electromagnetic (EM) characteristics of hot-wire detonators in order to quantify more precisely how they might respond to modern EM illumination. These analyses provide a precise tailored approach to EM safety and insights into IEEE Standard C95.7-2005. The ana...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2009-07, Vol.57 (7), p.1707-1713
Main Authors: Lambrecht, M.R., Cartwright, K.L., Baum, C.E., Schamiloglu, E.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Detonator
Detonators
Dielectrics
Electric, optical and optoelectronic circuits
electro-explosive device (EED)
Electromagnetic modeling
Electronics
Exact sciences and technology
Geometry
Illumination
Impedance
Input impedance
Lighting
Mathematical model
Mathematical models
MATLAB
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Microwaves
modeling
Predictive models
Safety
Studies
transmission line
Transmission line theory
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Summary:An effort is underway to determine the electromagnetic (EM) characteristics of hot-wire detonators in order to quantify more precisely how they might respond to modern EM illumination. These analyses provide a precise tailored approach to EM safety and insights into IEEE Standard C95.7-2005. The analyses include a comprehensive investigation of physical detonator characteristics, which is then used to model detonators using EM theory. The theoretical analysis treats the detonator as a cascaded transmission line incorporating several different dielectric regions, and examines both differential and common mode excitation for a generic detonator geometry. This model is then implemented in MATLAB and is used to calculate the input impedance for the detonator from dc to 9 GHz. This program can then be used to quickly investigate similarly constructed hot-wire detonators by simply varying the input parameters. The model is used to predict the input impedance for a state-of-the-art blasting cap, and these predictions are then compared with experimental measurements.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2009.2022811