| AVS 63rd International Symposium & Exhibition | |
| Novel Trends in Synchrotron and FEL-Based Analysis Focus Topic | Tuesday Sessions |
| Session SA-TuP |
| Session: | Novel Trends in Synchrotron and FEL-Based Analysis Poster Session |
| Presenter: | Trevor Willey, Lawrence Livermore National Laboratory |
| Authors: | M. Bagge-Hansen, Lawrence Livermore National Laboratory M. Nielsen, Lawrence Livermore National Laboratory L. Lauderbach, Lawrence Livermore National Laboratory R. Hodgin, Lawrence Livermore National Laboratory S. Bastea, Lawrence Livermore National Laboratory L. Fried, Lawrence Livermore National Laboratory D. Hansen, Lawrence Livermore National Laboratory C. May, Lawrence Livermore National Laboratory T. van Buuren, Lawrence Livermore National Laboratory T.M. Willey, Lawrence Livermore National Laboratory |
| Correspondent: | Click to Email |
The detonation of CHNO high explosives can generate an array of carbon nanomaterials including nano-onions, nano-diamond, and graphene products. The formation of these solid carbon phases occurs rapidly over the first several hundred nanoseconds, and a means to experimentally interrogate carbon nanomaterial formation during detonation will improve computational modeling and predictions of detonation phenomena. Experimental probes of carbon condensation under the extreme pressure and temperature conditions present during detonation at 100 ns timescales have been technically challenging to-date. Here, we present a new time-resolved small-angle x-ray scattering (SAXS) end-station, developed at LLNL and deployed at the Advanced Photon Source. This end-station at the Dynamic Compression Sector is capable of synchronously initiating detonation, and acquiring either small-angle x-ray scattering, or x-ray transmission radiographic images from discrete 80 ps x-ray pulses, which arrive every 153.4 ns during 24-bunch mode. The endstation can be trivially switched between SAXS and imaging modes. Images reveal densification within the explosive reaction zone, as well as detonation front curvature, and detonation velocity. The SAXS patterns demonstrate dramatic variation in the morphology and size of particles produced by different explosives. This work was performed under the auspices of the US DOE by LLNL under Contract DE-AC52-07NA27344