title: Double-sided laser heating system at HPCAT for in situ x-ray diffraction at high pressures and high temperatures.
abstract: An overview of a YLF:Nd laser heating system at the undulator x-ray diffraction station (16ID-B) of the high-pressure collaborative access team (HPCAT) of the Advanced Photon Source is presented. Based on the double-sided laser heating technique, the system is designed with considerable effort on the mechanical and optical stabilities, features for user-friendly operation, and the capability of accommodating diamond anvil cells of various heights up to 68 mm. This system has been used for x-ray diffraction studies of a wide range of materials to over 150 GPa and above 3000 K. Applying the laser heating technique to radial x-ray diffraction studies at simultaneous high-pressure and high-temperature (PT) conditions requires heating to be conducted at variable angles relative to the x-ray direction. A rotation laser heating design is discussed.
authors.affiliation: HPCAT, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA. Geophysical Laboratory, Carnegie Institution of Washington, Washington DC 20015, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Meng
authors.forename: G
authors.initials: G
authors.lastname: Shen
authors.forename: H K
authors.initials: HK
authors.lastname: Mao