New Developments On Laser Heated Diamond Anvil Cell

New developments on laser heated diamond anvil cell are reported by introducing a system installed at the Advanced Photon Source (APS). With the system, a laser heating spot of 20- 40 µm in diameter can be generated to temperatures over 3000 K for samples in diamond anvil cell; and the temperature gradients in the laser heated volume are less than 100 K. The system is based on the double sided laser heating technique, including (a) a heating laser system consisting of two Nd:YLF lasers with one operating in TEM00 and the other in TEM01*, (b) Kaiser holographic spectrometers together with the charge coupled device (CCD) for temperature measurement, and (c) optics that allows to combine various x-ray measurements. The system has been used to obtain in situ high P-T x-ray diffraction on metals, oxides, and silicates to temperatures over 3000 K and to pressures of 160 GPa. [diamond anvil cell, laser heating, x-ray diffraction, synchrotron, spectral radiometry