Free-surface velocity measurements of opaque materials in laser-driven shock-wave experiments using photonic Doppler velocimetry
Open Access
- 8 June 2021
- journal article
- research article
- Published by AIP Publishing in Matter and Radiation at Extremes
- Vol. 6 (4), 046902
- https://doi.org/10.1063/5.0046884
Abstract
We present a novel photonic Doppler velocimetry (PDV) design for laser-driven shock-wave experiments. This PDV design is intended to provide the capability of measuring the free-surface velocity of shocked opaque materials in the terapascal range. We present measurements of the free-surface velocity of gold for as long as ∼2 ns from the shock breakout, at pressures of up to ∼7 Mbar and a free-surface velocity of 7.3 km/s with an error of ∼1.5%. Such laboratory pressure conditions are achieved predominantly at high-intensity laser facilities where the only velocity diagnostic is usually line-imaging velocity interferometry for any reflector. However, that diagnostic is limited by the lower dynamic range of the streak camera (at a temporal resolution relevant to laser shock experiments) to measure the free-surface velocity of opaque materials up to pressures of only ∼1 Mbar. We expect the proposed PDV design to allow the free-surface velocity of opaque materials to be measured at much higher pressures.Keywords
This publication has 11 references indexed in Scilit:
- Dynamic experiments to study the α−ε phase transition in ceriumJournal of Applied Physics, 2020
- Tracking an imploding cylinder with photonic Doppler velocimetryReview of Scientific Instruments, 2013
- Accuracy and precision in photonic Doppler velocimetryReview of Scientific Instruments, 2010
- Ultrahigh-pressure scales for gold and platinum at pressures up to 550 GPaPhysical Review B, 2009
- Free-surface optical scattering as an indicator of the shock-induced solid-liquid phase transition in tinJournal of Applied Physics, 2008
- Accuracy limits and window corrections for photon Doppler velocimetryJournal of Applied Physics, 2007
- Compact system for high-speed velocimetry using heterodyne techniquesReview of Scientific Instruments, 2006
- Line-imaging velocimeter for shock diagnostics at the OMEGA laser facilityReview of Scientific Instruments, 2004
- Accurate measurement of laser-driven shock trajectories with velocity interferometryApplied Physics Letters, 1998
- Laser interferometer for measuring high velocities of any reflecting surfaceJournal of Applied Physics, 1972