Dr. Michael R. Armstrong Profile

Dr. Michael R. Armstrong

at Lawrence Livermore National Lab

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Author

Publications (3)

SPIE Journal Paper | 6 June 2022

Photon Doppler velocimetry surface return study for common surface preparations

William Mullins, Nazila Soleimani, Natalie Prince, Zachary Fussell, Michael Armstrong

OE, Vol. 61, Issue 06, 065102, (June 2022) https://doi.org/10.1117/12.10.1117/1.OE.61.6.065102

KEYWORDS: Scattering, Specular reflections, Velocimetry, Doppler effect, Light scattering, Speckle, Scatter measurement, Rayleigh scattering, Signal detection, Optical engineering

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Proceedings Article | 7 February 2009 Paper

Ultrafast high strain rate acoustic wave measurements at high static pressure in a diamond anvil cell

Michael Armstrong, Jonathan Crowhurst, Evan Reed, Joseph Zaug

Proceedings Volume 7214, 721407 (2009) https://doi.org/10.1117/12.809363

KEYWORDS: Acoustics, Ultrafast phenomena, Diamond, Aluminum, Picosecond phenomena, Phase shifts, Velocity measurements, Ultrafast measurement systems, Error analysis, Interfaces

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Proceedings Article | 7 February 2009 Paper

A new mechanism for observation of THz acoustic waves: coherent THz radiation emission

Evan Reed, Michael Armstrong, Ki-Yong Kim, James Glownia, William Howard, Edwin Piner, John Roberts

Proceedings Volume 7214, 72140P (2009) https://doi.org/10.1117/12.809326

KEYWORDS: Terahertz radiation, Acoustics, Interfaces, Gallium nitride, Wave propagation, Crystals, Dielectric polarization, Radio propagation, Heterojunctions, Picosecond phenomena

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