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Title: 39 GHz Interferometer System for Measuring Detonation Velocity

Abstract

A new 39 GHz RF interferometer system is presented for use in velocity measurements of high explosives (HE) detonations. The frequency was chosen to compliment the currently available suite, and provide more spatial information. An RF signal is generated and coupled to a waveguide adapter serving as an antenna. The HE is initially transparent to the RF. When the HE detonates, the detonation front becomes reflective to the RF. This reflection is picked up by the waveguide adapter and mixed with an unperturbed RF signal to give a low frequency signal which can be digitized with an oscilloscope. By comparing the signal with a reference signal, velocity information can be obtained using Fourier Transforms and wavelet models. Bench test results using a “slapper” are shown. The 39 GHz microwave interferometer is used in Deflagration to Detonation shots. The signal is reflected off a moving surface, and the Doppler shift of the reflected signal is used to calculate the velocity.

Authors:
 [1];  [1];  [1];  [2];  [2];  [2];  [2];  [2]
  1. National Security Technologies, LLC. (NSTec), Livermore, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
National Security Technologies, LLC. (NSTec), Livermore, CA (United States). Nevada Test Site
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1240916
Report Number(s):
DOE/NV/25946-2451
DOE Contract Number:  
AC52-06NA25946
Resource Type:
Conference
Resource Relation:
Conference: Center for Advanced Signal and Image Sciences (CASIS) Conference https://casis.llnl.gov/casis-2015/, Livermore, CA (United States), 15 May 2015
Country of Publication:
United States
Language:
English

Citation Formats

Ross, Patrick W., Tran, Vu, Waltman, Thomas B., Tringe, Joe, May, Chadd, Cradick, Jerry, Hodgin, Ralph, and Kane, Ron. 39 GHz Interferometer System for Measuring Detonation Velocity. United States: N. p., 2015. Web.
Ross, Patrick W., Tran, Vu, Waltman, Thomas B., Tringe, Joe, May, Chadd, Cradick, Jerry, Hodgin, Ralph, & Kane, Ron. 39 GHz Interferometer System for Measuring Detonation Velocity. United States.
Ross, Patrick W., Tran, Vu, Waltman, Thomas B., Tringe, Joe, May, Chadd, Cradick, Jerry, Hodgin, Ralph, and Kane, Ron. Wed . "39 GHz Interferometer System for Measuring Detonation Velocity". United States. https://www.osti.gov/servlets/purl/1240916.
@article{osti_1240916,
title = {39 GHz Interferometer System for Measuring Detonation Velocity},
author = {Ross, Patrick W. and Tran, Vu and Waltman, Thomas B. and Tringe, Joe and May, Chadd and Cradick, Jerry and Hodgin, Ralph and Kane, Ron},
abstractNote = {A new 39 GHz RF interferometer system is presented for use in velocity measurements of high explosives (HE) detonations. The frequency was chosen to compliment the currently available suite, and provide more spatial information. An RF signal is generated and coupled to a waveguide adapter serving as an antenna. The HE is initially transparent to the RF. When the HE detonates, the detonation front becomes reflective to the RF. This reflection is picked up by the waveguide adapter and mixed with an unperturbed RF signal to give a low frequency signal which can be digitized with an oscilloscope. By comparing the signal with a reference signal, velocity information can be obtained using Fourier Transforms and wavelet models. Bench test results using a “slapper” are shown. The 39 GHz microwave interferometer is used in Deflagration to Detonation shots. The signal is reflected off a moving surface, and the Doppler shift of the reflected signal is used to calculate the velocity.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {5}
}

Conference:
Other availability
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