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Title: Novel uses of detonator diagnostics

Abstract

A novel combination of diagnostics is being used to research the physics of detonator initiation. The explosive PETN (Pentaerythritol tetranitrate) commonly used in detonators, is also a piezo-electric material that, when sufficiently shocked, emits an electromagnetic field in the radio frequency (RF) range, along crystal fracture planes. In an effort to capture this RF signal, a new diagnostic was created. A copper foil, used as an RF antenna, was wrapped around a foam fixture encompassing a PETN pellet. Rogowski coils were used to obtain the change in current with respect to time (di/dt) the detonator circuit, in and polyvinylidene difluoride (PVDF) stress sensors were used to capture shockwave arrival time. The goal of these experiments is to use these diagnostics to study the reaction response of a PETN pellet of known particle size to shock loading with various diagnostics including an antenna to capture RF emissions. Our hypothesis is that RF feedback may signify the rate of deflagration to detonation transition (DDT) or lack thereof. The new diagnostics and methods will be used to determine the timing of start of current, bridge burst, detonator breakout timing and RF generated from detonation. These data will be compared to those of currentlymore » used diagnostics in order to validate the accuracy of these new methods. Future experiments will incorporate other methods of validation including dynamic radiography, optical initiation and use of magnetic field sensors.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1392861
Report Number(s):
LA-UR-17-28403
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; detonator diagnostics

Citation Formats

Gibson, John R., Wilde, Zakary Robert, Tasker, Douglas George, Francois, Elizabeth Green, Nakamoto, Teagan Kanakanui Junichi, Smith, Dalton Kay, and Trujillo, Christopher J. Novel uses of detonator diagnostics. United States: N. p., 2017. Web. doi:10.2172/1392861.
Gibson, John R., Wilde, Zakary Robert, Tasker, Douglas George, Francois, Elizabeth Green, Nakamoto, Teagan Kanakanui Junichi, Smith, Dalton Kay, & Trujillo, Christopher J. Novel uses of detonator diagnostics. United States. doi:10.2172/1392861.
Gibson, John R., Wilde, Zakary Robert, Tasker, Douglas George, Francois, Elizabeth Green, Nakamoto, Teagan Kanakanui Junichi, Smith, Dalton Kay, and Trujillo, Christopher J. Fri . "Novel uses of detonator diagnostics". United States. doi:10.2172/1392861. https://www.osti.gov/servlets/purl/1392861.
@article{osti_1392861,
title = {Novel uses of detonator diagnostics},
author = {Gibson, John R. and Wilde, Zakary Robert and Tasker, Douglas George and Francois, Elizabeth Green and Nakamoto, Teagan Kanakanui Junichi and Smith, Dalton Kay and Trujillo, Christopher J.},
abstractNote = {A novel combination of diagnostics is being used to research the physics of detonator initiation. The explosive PETN (Pentaerythritol tetranitrate) commonly used in detonators, is also a piezo-electric material that, when sufficiently shocked, emits an electromagnetic field in the radio frequency (RF) range, along crystal fracture planes. In an effort to capture this RF signal, a new diagnostic was created. A copper foil, used as an RF antenna, was wrapped around a foam fixture encompassing a PETN pellet. Rogowski coils were used to obtain the change in current with respect to time (di/dt) the detonator circuit, in and polyvinylidene difluoride (PVDF) stress sensors were used to capture shockwave arrival time. The goal of these experiments is to use these diagnostics to study the reaction response of a PETN pellet of known particle size to shock loading with various diagnostics including an antenna to capture RF emissions. Our hypothesis is that RF feedback may signify the rate of deflagration to detonation transition (DDT) or lack thereof. The new diagnostics and methods will be used to determine the timing of start of current, bridge burst, detonator breakout timing and RF generated from detonation. These data will be compared to those of currently used diagnostics in order to validate the accuracy of these new methods. Future experiments will incorporate other methods of validation including dynamic radiography, optical initiation and use of magnetic field sensors.},
doi = {10.2172/1392861},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {9}
}

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