Interferometric and Chirped Optical Probe Techniques for High-Pressure Equation-of-State Measurements
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. (c) 2000 The American Astronomical Society.
- OSTI ID:
- 20217560
- Journal Information:
- Astrophysical Journal, Supplement Series, Vol. 127, Issue 2; Other Information: PBD: Apr 2000; ISSN 0067-0049
- Country of Publication:
- United States
- Language:
- English
Similar Records
Progress on Deuterium EOS Measurements on Z
Solitary-wave emission fronts, spectral chirping, and coupling to beam acoustic modes in RPIC simulation of SRS backscatter.