Preshock desensitization of PBX explosives
- Los Alamos National Laboratory, Group M-7, MS P952, Los Alamos, Nex Mexico 87545 (United States)
Preshocking delays initiation of PBX-9404 and PBX-9501, relative to unshocked material. In PBX-9404 preshock experiment, a first shock of 2.3 GPa was followed 0.65 [mu]s later by a second shock of 5.6 GPa. Both PBX explosives show clear desensitization while the preshock persists. In PBX-9404, initiation of detonation occurs nearly as anticipated for the material, after coalescence of the preshock and main shock into a single wave. Multiple embedded magnetic gauges were used to measure the shock histories. Our data indicates a slighly longer run to detonation than expected, even though a single wave is initiating the material. A slight stress reduction at coalescence, as required by the shock dynamics, may be responsible for the overrun. A reactive wave is clearly evident while the preshock persists. The long run to detonation indicates that this reactive wave is not driving the initiation. A set of four preshock experiments were performed on PBX[minus]9502, which is unreactive at these pressures to investigate the shock dynamics of the two waves in the HE. [copyright]American Institute of Physics
- OSTI ID:
- 6967522
- Report Number(s):
- CONF-921145-; CODEN: APCPCS
- Journal Information:
- AIP Conference Proceedings (American Institute of Physics); (United States), Vol. 309:1; Conference: Production and neutralization of negative ions and beams, Upton, NY (United States), 9-13 Nov 1992; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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