Abstract
Time resolved Small Angle X-ray Scattering (SAXS) experiments on detonating explosives have been conducted at Argonne National Laboratory's Advanced Photon Source Dynamic Compression Sector. The purpose of the experiments is to measure the SAXS patterns at tens of ns to a few μs behind the detonation front. Corresponding positions behind the detonation front are of order 0.1–10 mm. From the scattering patterns, properties of the explosive products relative to the time behind the detonation front can be inferred. This report describes how the time and distance from the x-ray probe location to the detonation front is calculated, as well as the uncertainties and sources of uncertainty associated with the calculated times and distances.
Highlights
Solid carbon is a major constituent of high explosive (HE) detonation products, when the HE is oxygen-lean
We provide details of the TR-Small Angle X-ray Scattering (SAXS) experiments carried out at Sector 35 (DCS) of the Advanced Photon Source using the “standard 24-bunch” operating mode of the synchrotron
We summarized the experimental setup for recording Time-Resolved SAXS measurements on detonating explosives at the Advanced Photon Source, a third generation synchrotron light source
Summary
Solid carbon is a major constituent of high explosive (HE) detonation products, when the HE is oxygen-lean (carbon-rich). Previous reports of time-resolved small angle x-ray scattering (TR-SAXS) experiments on a variety of explosives, indicated that carbon clustering rates could be quite slow, occurring over several microseconds. These time scales should be compared with the CRZ timescales which are of order 200 ns. The overarching goal of our project is to obtain timeresolved SAXS patterns on detonating explosives and use these patterns to understand carbon clustering as a function of time and distance behind the detonation front. Information which can be extracted from the SAXS patterns includes particle size, shape, carbon allotrope, etc These results will not be presented here but rather in forthcoming publications. Example scattering patterns from one experiment are shown, these patterns will not be interpreted here, but rather in forthcoming publications
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