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Title: FY18 J23X PDZG Final Report: Double Shock Initiation of PBX 9502 Lot HOL88H891-008

Abstract

Heterogeneous high explosives subjected to sub-critical shock waves are known to exhibit desensitization to later shock inputs. While it is believed that this phenomenon is due to the removal of hot spot forming features in the explosive by the initial sub-critical shock, the effect of the time delay between the shocks is poorly understood. This report details a series of double shock plate impact experiments that vary the time between similar shocks to explore the time dependance of this shock desensitization process. These experiments were performed on the insensitive explosive PBX 9502 (95% TATB, 5% Kel-F 800) with lot number HOL88H891-008. The evolution of the shocks to a detonation was characterized by 9 embedded magnetic particle velocity gauges, and 116 embedded magnetic time of arrival gauges (AKA shock trackers). Photon Doppler velocimetry (PDV) with a LiF window was used at the back surface of the samples to capture the wave profile exiting the sample. Three double shock experiments were performed, with first and second shock pressures of 8.3 GPa and 16.5 GPa, respectively. An analogous single shock experiment at 16.3 GPa was also performed. The double shock experiments exhibited small levels of reaction during the initial shock,and shock desensitization tomore » the second shock. Run distances after shock coalescence were shorter than those expected for a single shock, indicating the shock to detonation transition (SDT) process was slightly further along due to partial reaction in the first shock wave. These data will be used to calibrate model behavior under multiple-shock conditions. Additional double shock data will be collected to further explore this area in FY2019. All data have been uploaded to the LANL Small Scale Database for use by the research community.« less

Authors:
ORCiD logo [1]; ORCiD logo [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:
1482903
Report Number(s):
LA-UR-18-30864
DOE Contract Number:  
89233218CNA000001
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
PBX 9502; shock initiation; embedded gauges

Citation Formats

Svingala, Forrest Robert, Gustavsen, Richard L., Jones, Justin Daniel, and Goodbody, Austin Bernard. FY18 J23X PDZG Final Report: Double Shock Initiation of PBX 9502 Lot HOL88H891-008. United States: N. p., 2018. Web. doi:10.2172/1482903.
Svingala, Forrest Robert, Gustavsen, Richard L., Jones, Justin Daniel, & Goodbody, Austin Bernard. FY18 J23X PDZG Final Report: Double Shock Initiation of PBX 9502 Lot HOL88H891-008. United States. doi:10.2172/1482903.
Svingala, Forrest Robert, Gustavsen, Richard L., Jones, Justin Daniel, and Goodbody, Austin Bernard. Wed . "FY18 J23X PDZG Final Report: Double Shock Initiation of PBX 9502 Lot HOL88H891-008". United States. doi:10.2172/1482903. https://www.osti.gov/servlets/purl/1482903.
@article{osti_1482903,
title = {FY18 J23X PDZG Final Report: Double Shock Initiation of PBX 9502 Lot HOL88H891-008},
author = {Svingala, Forrest Robert and Gustavsen, Richard L. and Jones, Justin Daniel and Goodbody, Austin Bernard},
abstractNote = {Heterogeneous high explosives subjected to sub-critical shock waves are known to exhibit desensitization to later shock inputs. While it is believed that this phenomenon is due to the removal of hot spot forming features in the explosive by the initial sub-critical shock, the effect of the time delay between the shocks is poorly understood. This report details a series of double shock plate impact experiments that vary the time between similar shocks to explore the time dependance of this shock desensitization process. These experiments were performed on the insensitive explosive PBX 9502 (95% TATB, 5% Kel-F 800) with lot number HOL88H891-008. The evolution of the shocks to a detonation was characterized by 9 embedded magnetic particle velocity gauges, and 116 embedded magnetic time of arrival gauges (AKA shock trackers). Photon Doppler velocimetry (PDV) with a LiF window was used at the back surface of the samples to capture the wave profile exiting the sample. Three double shock experiments were performed, with first and second shock pressures of 8.3 GPa and 16.5 GPa, respectively. An analogous single shock experiment at 16.3 GPa was also performed. The double shock experiments exhibited small levels of reaction during the initial shock,and shock desensitization to the second shock. Run distances after shock coalescence were shorter than those expected for a single shock, indicating the shock to detonation transition (SDT) process was slightly further along due to partial reaction in the first shock wave. These data will be used to calibrate model behavior under multiple-shock conditions. Additional double shock data will be collected to further explore this area in FY2019. All data have been uploaded to the LANL Small Scale Database for use by the research community.},
doi = {10.2172/1482903},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {11}
}

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