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Shock initiation of new and aged PBX 9501 measured with embedded electromagnetic particle velocity gauges.

DE2001766064

Publication Date	2000
Personal Author	Gustavsen, R. L.; Sheffield, S. A.
Page Count	8
Abstract	We have used an embedded electromagnetic particle velocity gauge technique to measure the shock initiation behavior in PBX 9501 explosive. Up to twelve separate particle velocity wave profile measurements have been made at different depths in a single experiment. These detail the growth from an input shock to a detonation. In addition, another gauge element called a 'shock tracker' has been used to monitor the progress of the shock front as a function of time and position as it moves through the explosive sample. This provides data similar to that obtained in a traditional explosively driven wedge test and is used to determine the position and time that the wave attains detonation. Run distance-to-detonation vs. input pressure (Pop-plot) data and particle velocity wave profile data have been obtained on new PBX 9501 pressed to densities of 1.826, 1.830, and 1.837 g/cm3. In addition, the same measurements were performed on aged material recovered from dismantled W76 and W78 weapons. The input pressure range covered was 3.0 to 5.2 GPa. All results to date show shock sensitivity to be a fiction only of the initial density (differences in density as small as 0.005 g/cm3 produce measurable changes in sensitivity) and not of age.
Keywords	Chemical explosives Electromagnetism Particles Velocity Measuring methods Impact shock Monitoring Detonation waves
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	79E - Detonations, Explosion Effects, & Ballistics
Corporate Authors	Los Alamos National Lab., NM.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200124
Contract Number	W-7405-ENG-36

Shock initiation of new and aged PBX 9501 measured with embedded electromagnetic particle velocity gauges.

Shock initiation of new and aged PBX 9501 measured with embedded electromagnetic particle velocity gauges.
DE2001766064

Publication Date	2000
Personal Author	Gustavsen, R. L.; Sheffield, S. A.
Page Count	8
Abstract	We have used an embedded electromagnetic particle velocity gauge technique to measure the shock initiation behavior in PBX 9501 explosive. Up to twelve separate particle velocity wave profile measurements have been made at different depths in a single experiment. These detail the growth from an input shock to a detonation. In addition, another gauge element called a 'shock tracker' has been used to monitor the progress of the shock front as a function of time and position as it moves through the explosive sample. This provides data similar to that obtained in a traditional explosively driven wedge test and is used to determine the position and time that the wave attains detonation. Run distance-to-detonation vs. input pressure (Pop-plot) data and particle velocity wave profile data have been obtained on new PBX 9501 pressed to densities of 1.826, 1.830, and 1.837 g/cm3. In addition, the same measurements were performed on aged material recovered from dismantled W76 and W78 weapons. The input pressure range covered was 3.0 to 5.2 GPa. All results to date show shock sensitivity to be a fiction only of the initial density (differences in density as small as 0.005 g/cm3 produce measurable changes in sensitivity) and not of age.
Keywords	Chemical explosives Electromagnetism Particles Velocity Measuring methods Impact shock Monitoring Detonation waves
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	79E - Detonations, Explosion Effects, & Ballistics
Corporate Authors	Los Alamos National Lab., NM.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200124
Contract Number	W-7405-ENG-36