TITLE

A high-resolution two-dimensional imaging velocimeter

AUTHOR(S)
Celliers, P. M.; Erskine, D. J.; Sorce, C. M.; Braun, D. G.; Landen, O. L.; Collins, G. W.
PUB. DATE
March 2010
SOURCE
Review of Scientific Instruments;Mar2010, Vol. 81 Issue 3, p035101
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Velocity interferometers are typically used to measure velocities of surfaces at a single point or along an imaged line as a function of time. We describe an optical arrangement that enables high-resolution measurements of the two-dimensional velocity field across a shock front or shocked interface. The technique is employed to measure microscopic fluctuations in shock fronts that have passed through materials being considered as ablators for indirect-drive inertial confinement fusion. With picosecond time resolution the instrument captures velocity modes with wavelengths as short as 2.5 μm at a resolution of ∼10 m/s rms on velocity fields averaging many km/s over an 800 μm field of view.
ACCESSION #
48911802

 

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