HR: 1340h
AN: MR23C-0084    [Abstracts]
TI: Multi-Anvil Techniques in Conjunction With Synchrotron Radiation - MAX80 and MAX200x
AU: * Mueller, H J
EM: Hans-Joachim.Mueller@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam, Dept. 4, Telegraphenberg, Potsdam, D-14473 Germany
AU: Schilling, F R
EM: fsch@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam, Dept. 4, Telegraphenberg, Potsdam, D-14473 Germany
AU: Lathe, C
EM: Christian.Lathe@DESY.de
AF: DESY-HASYLAB, Notkestr. 85, Hamburg, D-22607 Germany
AB: During the early 80's of the last century geoscientists worldwide realized synchrotron radiation as a highly valuable tool for in situ experiments, i.e. experiments under simulated Earth's mantle conditions. MAX80 at HASYLAB, Hamburg, a single-stage multi-anvil DIA-system at a synchrotron beamline was among the high-pressure pioneer apparatus designed in Japan. Meantime it is equipped for all kinds of ultrasonic interferometry in conjunction with synchrotron radiation measurements, i.e. XRD and X-radiography. The maximum conditions are about 10 GPa / 2000 K. To make transition zone conditions accessible and to achieve bigger specimen volumes the sister apparatus MAX200x, a double-stage DIA-system, was installed at the HASYLAB HARWI-II beamline recently. The newly designed high-flux hard wiggler is an optimum X-ray source for this kind of experiments. MAX2000x is designed to reach 25 GPa and 2400 K, simultaneously. MAX200x is driven by a hydraulic ram with a maximum load of 1750 tons. This press is mounted on a y-z-table to adjust the sample to the synchrotron beam. Furthermore, the press can be rotated to enhance statistics during the diffraction experiments. The whole system weights about 30 tons. Derived from the successful equipment of MAX80 and adapted to the new task MAX200x is equipped for XRD with a Ge-solid-state detector, for transient ultrasonic interferometry, as well as with a radiography system to measure the change of volume and shape of the sample under in situ conditions. A stepper motor driven slits system allows to optimize X-ray beam size and shape for the experiments. The whole system is remote controlled. The goniometer will be mounted on a moveable table. Both, experiments with monochromatic and white X-rays will be available. Besides Ge-solid state detector new designed goniometers will be used to enhance the precision of the experiments. Parallel to the installation of MAX200x some innovative experiments were carried out to improve the potentials of multi-anvil apparatus in terms of maximum pressure and limitation of stress inside the sample and the anvils. Some recent results of these experiments as well as the data of the first experiments with the new double-stage system are reported. Mueller et al., 2005a. In: Advances in High Pressure Technology for Geophysical Application, chapter 4, Elsevier B.V., pp. 67-94.
Mueller et al., 2005b. In: Advances in High Pressure Technology for Geophysical Application, chapter 21, Elsevier B.V., pp. 427-449.
Yagi, T., 1988. Eos Transactions, AGU 69, 12, pp. 18-27.
UR: http://www.gfz-potsdam.de/pb4
DE: 3909 Elasticity and anelasticity
DE: 3924 High-pressure behavior
DE: 3954 X-ray, neutron, and electron spectroscopy and diffraction
DE: 3994 Instruments and techniques
DE: 3999 General or miscellaneous
SC: Mineral and Rock Physics [MR]
MN: Fall Meeting 2005