Interferometric and Chirped Optical Probe Techniques for High-Pressure Equation-of-State Measurements

Details Interferometric and Chirped Optical Probe Techniques for High-Pressure Equation-of-State Measurements Interferometric and Chirped Optical Probe Techniques for High-Pressure Equation-of-State Measurements

Apr 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apjs..127..333g&link_type=abstract

The Astrophysical Journal Supplement Series, Volume 127, Issue 2, pp. 333-337.

Astronomy and Astrophysics

Astronomy

3

Equation Of State, Methods: Laboratory, Plasmas, Shock Waves, Techniques: Interferometric

Scientific paper

We present experimental work exploring displacement and velocity interferometry as high spatial and temporal resolution diagnostics for measuring target preheat and the speed, planarity, and steadiness of a shock wave. A chirped pulse reflectometry experiment is also proposed as a frequency domain alternative for shock speed measurements. These techniques fill a need for high-precision diagnostics to derive accurate laboratory-based equation-of-state data at shock wave-driven pressures directly relevant to astrophysical systems. The performance of these optical laser probe techniques may exceed conventional passive techniques such as temporally streaked recording of optical emission upon shock breakout or side-on streaked X-ray radiography. Results from Nova laser and high-intensity ultrashort pulse experiments are presented. This work was performed by Lawrence Livermore National Laboratory under the auspices of the US Department of Energy under contract W 7405-ENG-48.

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