MEASUREMENTS OF THE RELEASE OF ALPHA QUARTZ: A NEW STANDARD FOR IMPEDANCE‐MATCHING EXPERIMENTS

Measurements of the release of alpha quartz into SiO2 aerogel are found to agree well with previous near‐direct measurements for that aerogel Hugoniot. The results establish alpha quartz as an impedance‐matching standard that, because of its transparency, enables higher‐accuracy measurements and knowledge of the pressure profile in the pusher.