Hurry up or take your time: kinetics of shock-driven phase transitions and dynamic x-ray diffraction

 · Invited

Abstract

One of the unanswered questions in physics is how much time does a shock-driven phase transition need - i.e. its kinetics? And how does this time influence the end-result of the shock process?
Traditionally, phase transitions in dynamic compression are inferred from continuum data and compared to results from static compression experiments, shock-recovery, or calculations.
With the development of time-resolved synchrotron dynamic x-ray diffraction (DXRD) combined with shock compression a new dawn is rising for the field of shock physics, as one can now probe atomic-scale changes in situ, with nanosecond resolution.
We will illustrate the atomic- and nanosecond-scale quantification of kinetics of shock-driven phase transitions in example materials. We will also show how we leverage two user facilities of the Advanced Photon Source: DCS and HPCAT, in synergistic dynamic/static compression experiments.

*SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525.
This work describes objective technical results and analysis. Any subjective views or opinions that might be expressed in the work do not necessarily represent the views of the U.S. Department of Energy or the United States Government.
Portions of this work were performed at DCS (Sector 35), APS, ANL. DCS is operated by WSU under the U.S. DOE/NNSA award no. DE-NA0002442. Portions of this work were performed at HPCAT (Sector 16), APS, ANL. HPCAT operations are supported by DOE-NNSA's Office of Experimental Sciences.
The APS is a U.S. DOE Office of Science User Facility operated for the DOE Office of Science by ANL under Contract No. DE-AC02-06CH11357.

Presenters

  • Patricia Kalita

    • Sandia National Laboratories

Authors

  • Patricia Kalita

    • Sandia National Laboratories