High explosive corner turning performance and the LANL Mushroom test

Hill, Larry; Seitz, W.L.; Forest, C.A.; Harry, Herbert H.

doi:10.2172/532574

Cited by 8 publications

(7 citation statements)

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“…There exist many other corner-turning tests that utilize hemispherical explosives -notably the Lawrence Livermore National Laboratory (LLNL) jack rabbit [22,23] and the LANL mushroom [24,25]. Although previous work has shown that each of these tests have produced the same corning turning data of interest to the present study, the utilization of hemispherical explosive samples presents the same scaling complications discussed for the SAX test, excluding these tests from further consideration.…”

Section: Introductionmentioning

confidence: 92%

An Experimental Investigation of Corner‐Turning Performance in a Large Double Cylinder of Highly‐Insensitive Explosive

Cornell

Wrobel

2021

Propellants Explo Pyrotec

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When creating ignition and growth models for new explosive formulations, it is crucial to have a complete understanding of transverse detonation growth within the material to accurately predict corner‐turning performance in various geometries. This understanding is particularly important when designing a direct replacement for an existing explosive, typically with requirements to maintain function in terms of both initiation and end effects/lethality. While there have been many corner‐turning tests developed and successfully utilized over the last 60 years, many of the experimental designs favor traditional explosives that tend to exhibit ideal growth behavior. Many of the traditional corner‐turning tests exhibit prohibitive complications when faced with geometric scale‐up to accommodate large critical diameters that often accompany insensitive behavior. In an effort to address this shortcoming, the authors propose a corner‐turning test that can easily scale to accommodate a wide range of critical diameters and introduces modern diagnostics to provide additional data known to be useful for model development. As a case study for IMX‐104, the work herein uses a combination of streaked fiber optics and photonic Doppler velocimetry probes (PDV) to investigate corner turning within a large double cylinder geometry. Additionally, diameter effects on detonation velocity measurements, front wave curvature, and extent of reaction at various PDV probe locations are investigated using the same diagnostics. These experimental results have since been used to improve an IMX‐104 ignition and growth model that has been used to support the development of numerous warhead designs – notably the 155 mm family of artillery munitions.

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Section: Introductionmentioning

confidence: 92%

An Experimental Investigation of Corner‐Turning Performance in a Large Double Cylinder of Highly‐Insensitive Explosive

Cornell

Wrobel

2021

Propellants Explo Pyrotec

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“…Under specific conditions, detonation can be reformed again. However, when the energy of the diffraction detonation wave is inadequate to initiate detonation, it acts as a preloading effect on the explosive, and reduces the sensitivity of the explosive due to the density increase in the unexploded area, the so-called "dead zone" [21,27,28]. Based on this idea, we designed an explosive circuit with multiple 90°angles.…”

Section: Corner Turning Ability Of Detonation Wavementioning

confidence: 99%

Formulation of CL‐20‐Based Explosive Ink and Its Detonating Transfer Performance in Micro‐Size Charge

Peng

et al. 2019

Propellants Explo Pyrotec

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Explosive ink in the micro-size charges of explosive circuits for energetic devices has attracted considerable interest. Herein, explosive ink with 90 wt.% of energetic solid was selected by testing the rheological properties of formulations with different CL-20 concentrations. Explosive ink suspensions with sub-micro 4,6,8,10,4,6,8,10, as main explosive and fluorine-containing rubber/polyvinyl alcohol (PVA) emulsion as binder system were prepared. Direct ink writing (DIW) technology was used for the printing of the sample and for the loading of the explosive ink in a micro-size groove. The morphology and crystal type of the CL-20-based composite samples were characterized by SEM and XRD, and its detonating transfer performance in the micro-size groove were tested. Results show that the CL-20based composite has a good molding effect, and the crystal type has not changed. The critical detonation thickness is around 11 μm at 1.0 mm fixed width in the wedge tests, and the critical detonation size (cross section) is about 0.3 mm × 0.3 mm. The detonation wave could continue to propagate around multiple 90°corners. The maximum corner turning ability of the detonation wave is 140°and the CL-20-based composite can detonate completely in a complex charge circuit.Keywords: CL-20 · explosive ink · detonating transfer performance · corner turning ability · micro-size detonation Figure 6. (a) Optical image of explosive circuit charges with multiple 90°corner before detonation; (b) Optical image of charge substrate after detonation.

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“…In recent years, a few results have been published related to coherent information transfer in a system of two TLAs, including discussion of the problem from the entanglement measure viewpoint [26] and the "eavesdropping problem" [27]. A number of different experiments have been proposed to study controlled entanglement between two atoms [28,29].…”

Section: Coherent Information Transfer Between Two Quantum Systemsmentioning

confidence: 99%

Coherent-information analysis of quantum channels in simple quantum systems

Grishanin

Zadkov

2000

Phys. Rev. A

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The coherent information concept is used to analyze a variety of simple quantum systems. Coherent information was calculated for the information decay in a two-level atom in the presence of an external resonant field, for the information exchange between two coupled two-level atoms, and for the information transfer from a two-level atom to another atom and to a photon field. The coherent information is shown to be equal to zero for all full-measurement procedures, but it completely retains its original value for quantum duplication. Transmission of information from one open subsystem to another one in the entire closed system is analyzed to learn quantum information about the forbidden atomic transition via a dipole active transition of the same atom. It is argued that coherent information can be used effectively to quantify the information channels in physical systems where quantum coherence plays an important role.

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High explosive corner turning performance and the LANL Mushroom test

Cited by 8 publications

References 0 publications

An Experimental Investigation of Corner‐Turning Performance in a Large Double Cylinder of Highly‐Insensitive Explosive

An Experimental Investigation of Corner‐Turning Performance in a Large Double Cylinder of Highly‐Insensitive Explosive

Formulation of CL‐20‐Based Explosive Ink and Its Detonating Transfer Performance in Micro‐Size Charge

Coherent-information analysis of quantum channels in simple quantum systems

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