Dielectric characterization and microwave interferometry in HMX-based explosives

Tringe, Joseph W.; Kane, R.J.; Lorenz, K. Thomas; Baluyot, Emer V.; Vandersall, Kevin S.

doi:10.1088/1742-6596/500/14/142033

Cited by 7 publications

(5 citation statements)

References 9 publications

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“…Direct measurements of HE dielectric constants have been published up to 20 GHz (see e.g. [7], [10], [11]), and by conducting measurements in the 20-50 GHz range used by our interferometers we will limit the velocity uncertainty due to unknown HE dielectric constant.…”

Section: Discussionmentioning

confidence: 99%

Experimental and computational investigation of microwave interferometry for detonation front characterization

Mays

Tringe

Souers

et al. 2018

AIP Conference Proceedings

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Section: Discussionmentioning

confidence: 99%

Experimental and computational investigation of microwave interferometry for detonation front characterization

Mays

Tringe

Souers

et al. 2018

AIP Conference Proceedings

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“…The determination of the relative permittivity by the bare cylinder test has already been reported [14]. It consists of monitoring the detonation velocity in the bare cylinder by using shorting pins and the millimeter-wave (94 GHz) interferometry technique.…”

Section: Full Papermentioning

confidence: 99%

“…Another standard technique for measuring the dielectric constant of high explosives materials consists in tracking the detonation wavefront of a bare cylinder. Tringe et al [14] implemented this method to analyze the properties of LX-10. The results were compared with static measurement data by using a coaxial probe on three HMX-based compositions.…”

Section: Introductionmentioning

confidence: 99%

Static and Dynamic Permittivity Measurement of High Explosives in the W Band to Investigate Shock and Detonation Phenomena

Rougier

Lefrançois

Chuzeville

et al. 2018

Propellants Explo Pyrotec

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Radio interferometry techniques are often used to investigate shock and detonation phenomena thanks to the radio‐transparency of high explosives in the gigahertz frequency band. These techniques require the knowledge of the permittivity of studied explosives. Although the permittivity has been thoroughly studied for many materials, very few data are available at high frequencies (>75 GHz) for high explosives. In this paper, we report static measurement data of the permittivity for various reactive materials using the standard line transmission method between 75 GHz and 110 GHz (W frequency Band), and we present dynamic measurement results at 94 GHz obtained from the so‐called detonation wavefront tracking method. It is shown that the measurement results provided by these two methods are in good agreement. As a consequence, this work validates the detonation wavefront tracking method for the dynamic measurement of high explosives permittivity, and shows that the static experimental results are relevant for shock wave propagation analysis from millimeter‐wave measurement techniques.

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“…Considering that the detonation propagation process of the microcharge is easily disturbed, the embedded approaches including optical fiber based on chirped Bragg grating, continuous velocity probe, and particle velocity gauge, are not suitable for measurement on a microscale. As to microwave interferometry, it is hard to miniaturize the wave-guide to match the microcharge size and microwave energy is generally attenuated by solid explosives, requiring relatively powerful and expensive microwave interferometer to generate extremely high-frequency signals [10].…”

Section: Introductionmentioning

confidence: 99%

Application and Analysis of Discrete Fiber Probes in Determining Detonation Velocity of Microcharges

2021

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This paper describes a method based on discrete fiber probes for measuring detonation velocity produced by microcharges. This method is simple to implement, scalable for multi-channel and requires minimal perturbation to the detonation wave. A simple experimental apparatus was established by using the oscilloscope, photodetectors, optical fibers, alignment device and initiation system. Four groups of experiments were carried out for analyzing the influence of probe spacing on detonation velocity. The experiment results suggest that a relatively appropriate distance between two adjacent fiber probes is 4 mm. In addition, the comparative experiments between ionization probes and fiber probes were performed, which shows that the standard deviation of detonation velocity obtained by fiber probes is smaller under the same measurement conditions. This research may be useful for the development of determining detonation velocity precisely of microcharges.

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Dielectric characterization and microwave interferometry in HMX-based explosives

Cited by 7 publications

References 9 publications

Experimental and computational investigation of microwave interferometry for detonation front characterization

Experimental and computational investigation of microwave interferometry for detonation front characterization

Static and Dynamic Permittivity Measurement of High Explosives in the W Band to Investigate Shock and Detonation Phenomena

Application and Analysis of Discrete Fiber Probes in Determining Detonation Velocity of Microcharges

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