Chris Tulk, SNS
24-25th September 2010
Hydrogen-dominated materials will be studied by neutron diffraction at SNS (Oak Ridge). Two new type diamond cells will be developed : a) “belt”-type diamond cell with sample volumes of about ½ mm3 ; b) DAC with modified culets with neutron diffraction capabilities to near 1 Megabar.
Study of the phase diagram of hydrogen above one megabar using modified anvil designs with enhanced chemical resistance (with C.S. Zha). An Excimer laser is used to cut dishes into the culets of the diamond anvils, which will then partly be filled with a material that reduces the chemical/physical interaction between hydrogen and diamond.
- Sci. Thrust Areas: Hydrogen & Hydrogen-Bearing Systems, Metals Under Extreme Environments
- Technology Task Force Teams: Extreme P-T Devices, Laser Techniques, Materials for Extreme P-T, Neutrons, Synchrotron Radiation
- Personnel: Reini Boehler, Alex Goncharov, Malcolm Guthrie, Russell Hemley, Ho-kwang (Dave) Mao, Chang-Sheng Zha
- Key Partners: John V. Badding, Penn State
- HPSynC: Guoyin Shen
- National Laboratory Partners: Chris Tulk, SNS