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This picture shows the Brillouin Scattering apparatus that we use to measure sound velocities (comparable to seismic wave velocities) on small crystals at high pressures and temperatures. A high-temperature furnace is on the left (with tubes attached for controlling the atmosphere in the furnace), and a Eularian cradle on the right (for single crystal work and diamond cell work).
Below is a Brillouin experiment using a high temperature furnace (the silver furnace at top center).
Below is an experiment being performed on a sample in a diamond anvil cell. We squeeze samples between diamonds to generate high pressures similar to those in the deep Earth
A sample of beta (Mg,Fe)2SiO4 , which is a high pressure phase of olivine that exists in the transition zone of Earth's mantle.
A schematic of the diamond cell experiment for simultaneous high pressure and high temperature velocity measurements, showing just the area around the sample chamber.
A view of the entire Merrill-Bassett style diamond cell.
A schematic view of the Brillouin Scattering system in Bass' lab.
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