NSLS-U2A: The diamond anvil cell Infrared facility (NSLS-U2A) at the National Synchrotron Light Source (NSLS) is the first dedicated high-pressure beamline in the world. The U2A facility is located on the VUV ring and served by an infrared port delivering a minimum of 40 mrad (horiz.) by 40 mrad (vert.). The U2A optics consist of full-acceptance collection and relay optics designed to feed the full spectral range to one of two spectrometers (interferometers) and endstations.

Main techniques and equipment: Far- and mid-IR reflectivity and absorption measurements from kilobar to multimegabar pressures and temperatures in the range of 4-1000 K; Companion Raman, UV-visible absorption/reflectivity and ruby fluorescence capability with Ar-ion, as well as DPSS lasers, cryostats, and furnaces; Two Bruker FT-IR spectrometers (Vertex 80v and IFS/66v) for the spectral range 30-25,000 cm-1 and four IR microscopes including Bruker Hyperion 2000 and IRscopeII microscopes, a custom made vacuum microscope for far-IR absorption, and an integrated microscope system for both IR and Raman experiments at high pressure and variable temperature; off-line CO2 laser heating system (under construction).

Studies of: phonon dynamics, phase transitions, chemical reactions, amorphization, liquid and glass structure, and other properties under extreme conditions.

Materials: small molecular systems, minerals, metals, oxides, silicates, nitrides, manganites, clathrates, nanocrystals, and many others.