A time-resolved single-pass technique for measuring optical absorption coefficients of window materials under 100 GPa shock pressures

Li, Jun; Zhou, Xianming; Li, Jiabo
December 2008
Review of Scientific Instruments;Dec2008, Vol. 79 Issue 12, p123107
Academic Journal
An experimental method was developed to perform time-resolved, single-pass optical absorption measurements and to determine absorption coefficients of window materials under strong shock compression up to ∼200 GPa. Experimental details are described of (i) a configuration to generate an in situ dynamic, bright, optical source and (ii) a sample assembly with a lithium fluoride plate to essentially eliminate heat transfer from the hot radiator into the specimen and to maintain a constant optical source within the duration of the experiment. Examples of measurements of optical absorption coefficients of several initially transparent single crystal materials at high shock pressures are presented.


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