Speaker
H.-P. Liermann
(Deutsches Elektronen Synchrotron (DESY), Hamburg, Germany)
Description
Powder x-ray diffraction experiments in laser heated diamond anvil cells (DAC) have been a standard experimental technique used at all 3rd generation extreme condition synchrotron facilities over the last decades. However, the combination of single crystal diffraction at simultaneous high-pressure and –temperature using a laser heated DAC has not been realized. This is in part because single crystal diffraction pattern created by monochromatic beam can only be collected on an area detector when the sample within the DAC is rotated, resulting ultimately in the obstruction of the laser heating beam. However, rotations of the sample can be eliminated when one uses pink beam Laue diffraction.
In this paper we describe the design of the “Extreme Conditions Beamline” P02B at PETRA III, Hamburg, Germany, that will be used to conduct both monochromatic (8-80 keV) and pink beam diffraction experiments. Attention will be drawn to the pink beam capabilities of the station and the alternate use of monochromatic and pink x-ray beams and the possibility to conducted single crystal diffraction in the laser heated DAC. We will discuss the different phases of the beamline development and additional high-pressure experimental techniques that will be offered once commissioning of the beamline is completed. The possibility of conducting time resolved experiments in the dynamic DAC (1) in conjunction with fast choppers will be discussed, i.e. pump and probe experiments in the sub second regime that could shade light on the nature of transient phase stages occurring during phase transition at simultaneous high-pressures and -temperatures.
References:
(1) Evans WJ, Yoo CS, Lee GW, Cynn H., Lipp MJ, Visbeck K. (2007) Dynamic diamond anvil cell (dDAC): A novel device for studying the dynamic-pressure properties of materials. Rev. Sci. Inst., 78, 073904.
Primary author
H.-P. Liermann
(Deutsches Elektronen Synchrotron (DESY), Hamburg, Germany)
Co-authors
A. Berghäuser
(Department of Mineralogy, University of Hamburg, Hamburg, Germany)
A. Ehnes
(Deutsches Elektronen Synchrotron (DESY), Hamburg, Germany)
B. Winkler
(Department of Crystallography, University of Frankfurt, Frankfurt, Germany)
E. Weckert
(Deutsches Elektronen Synchrotron (DESY), Hamburg, Germany)
H. Franz
(Deutsches Elektronen Synchrotron (DESY), Hamburg, Germany)
W. Morgenroth
(Department of Crystallography, University of Frankfurt, Frankfurt, Germany)
