In the University of Chicagos Laboratory for Mineral Physics, diamond anvil cells are used to generate high pressure conditions comparable to those in the Earths mantle and core, even reaching >200 GPa and >5000 K.
The diamond anvils not only apply the pressure, but act as windows to the sample, allowing optical and X-ray access. The samples physical and chemical properties can be probed using a variety of laser spectroscopies and X-ray techniques.
Optical systems in the laboratory include a ruby fluorescence system for pressure measurement, a Raman spectroscopy system, and a 1064 nm laser heating system that subjects diamond anvil cell samples to >3000 K. The application of fiber lasers for laser heating high pressure samples was pioneered in our lab, and their use has since spread to labs around the world.
Our laser heating system is unique in its ability to measure 2D temperature distributions across the laser heated spot (right). This is a great improvement over older systems that measure only a single temperature at a time, or a 1D profile at best. The multispectral imaging system (below) was described by Campbell (2008)
We are frequent users of the FIB-SEM facility
located in our department. With this instrument we perform precise sectioning and chemical microanalysis of products from laser heated diamond anvil experiments.
Synchrotron x-ray sources are also an important tool in our research. We are regular users of the Advanced Photon Source
and the Advanced Light Source