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HEMI Workshop: Experimental Design and Analysis Using Photon Doppler Velocimetry

May 14, 2020 @ 2:00 pm - 5:00 pm

Experimental Design and Analysis Using Photon Doppler Velocimetry
Debjoy Mallick
Scientist, CCDC Army Research Laboratory

In this brief workshop, we will discuss the design considerations and analysis techniques required to use photon Doppler velocimetry (PDV) as a diagnostic tool for impact experiments. We will begin with the fundamental principles for interferometry, followed by a discussion of my preferred system design for impact diagnostics. We will then discuss the fundamental principles of PDV signal analysis and perform a brief demonstration of PDV signal analysis using Department of Energy PDV analysis tools (SIRHEN) as well as a home-grown MATLAB code. We will conclude with an exploration of measurement uncertainty using PDV. Attendees are encouraged to have some prior experience using PDV systems and to come with prepared questions, as the course is not expected to exceed 2 hours in time and not all possible topics will be covered. Attendees are also encouraged to come to the workshop with SIRHEN already installed for use with their MATLAB distributions. SIRHEN is available as a plug in for MATLAB as part of the SMASH toolbox here:  https://github.com/SMASHtoolbox/release.

For login information, please contact Matt Shaeffer ([email protected]).

Debjoy Mallick’s research interests lie at the interface of solid mechanics, material science, and shock physics. He enjoys developing techniques and diagnostics to investigate the failure of shock compressed materials. He has been a scientist at Army Research Lab at Aberdeen Proving Ground, MD, since 2010 and recently completed his Ph.D. from Johns Hopkins University under advisement by Prof. KT Ramesh in the Hopkins Extreme Materials Institute. He also holds a B.S. in biomedical engineering from Johns Hopkins University (c/o 2009). Debjoy’s academic achievements have been recognized and supported by the Science, Mathematics, And Research For Transformation (SMART) Defense Scholarship Program.