Compres Laser Heating Activities Technical CO2 laser heating system at GSECARS Component of ID-D upgrade (in progress) Staff: Andy Campbell (50%, beginning July 1) Scientific Thermal pressure studies in laser heated DAC at 20-35 GPa (Kubo, Duffy, Shen) Finite element modeling of thermal structures in laser-heated diamond cell (Kiefer and Duffy) Ultrahigh P-T studies of crystal structures and phase relations SiO2 (Shieh, Duffy, Shen) MgSiO3 (Shim, Jeanloz, Duffy, Shen) Outreach Laser heating workshop held in March 2004 at APS
Transcript
Compres Laser Heating Activities
Technical
CO2 laser heating system at GSECARS
Component of ID-D upgrade (in progress)
Staff: Andy Campbell (50%, beginning July 1)
Scientific
Thermal pressure studies in laser heated DAC at 20-35 GPa (Kubo, Duffy, Shen)
Finite element modeling of thermal structures in laser-heated diamond cell (Kiefer and Duffy)
Ultrahigh P-T studies of crystal structures and phase relations
SiO2 (Shieh, Duffy, Shen)
MgSiO3 (Shim, Jeanloz, Duffy, Shen)
Outreach
Laser heating workshop held in March 2004 at APS
Laser-Heated Diamond Anvil Cell
Gasket
InsulationDiamond
Diamond
Sample
Al2O3
The Computational Grid
Finite element modeling (Flexpde) * Local refinement of mesh. * 1600-4000 nodes
Temperature (K/1000)
Insulation
Sample
Al2O3
Temperature Distribution in LHDAC
ΔTaxial (K)
Predicted Axial Temperature Drop
YAG:Ce
Ruby
Ar
Silicate + Pt
175m
X-ray fluorescence of YAG:Ce
Thermal emission from heated sample After multiple heating cycles
Laser heating of Pyrope (Mg3Al2Si3O12) Garnet at ~30 GPa
Precision (~3 micron) alignment of heating and x-ray spots achieved using fluorescent YAG:Ce crystals
