1. Haozhe Liu COMPRES Workshop Plan and More Radial Diffraction Studies in DAC (Rheology in DAC)

2. Breakout discussion group June 18, 2005 Jiuhua Chen (Stony Brook) Shun-Ichiro Karato (Yale) Atsushi Kubo (Princeton) Quanzhong Guo (X17B3, NSLS) Jingzhu Hu (X17C, NSLS) Haozhe Liu (HPCAT, APS) Zhenxian Liu (U2A, NSLS) Hongbo Long (Stony Brook) Yanzhang Ma (Texas Tech) Sergio Speziale (UC Berkely)

3. Advisory Committee Jiuhua Chen (State University of New York at Stony Brook) Robert B. von Dreele (IPNS, Argonne National Laboratory) Daniel Häusermann (HPCAT, Advanced Photon Source) Russell J. Hemley (Geophysical Lab, Carnegie Institution of Washington) Murli Manghnani (Hawaii Institute of Geophysics and Planetology) Ho-kwang Mao (Geophysical Lab, Carnegie Institution of Washington) Malcolm McMahon (University of Edinburgh, UK) Malcolm Nicol (UNLV High Pressure Science and Engineering Center) John Parise (State University of New York at Stony Brook) Guoyin Shen (GSECARS, University of Chicago) John S. Tse (SIMS, National Research Council of Canada) Yanbin Wang (GSECARS, University of Chicago)

4. X-ray imaging of stress and strain of diamond, iron, and tungsten at megabar pressures Hemley RJ, Mao HK, Shen GY, Badro J, Gillet P, Hanfland M, Hausermann D SCIENCE 276 (5316): 1242-1245 (1997)

5. The plastic deformation of iron at pressures of the Earth's inner core Wenk HR, Matthies S, Hemley RJ, Mao HK, Shu J NATURE 405 (6790): 1044-1047 (2000)

6. Radial diffraction in DAC: elastic anisotropy, strain and stress, yield strength, preferred orientation etc. One key goal of the workshop: Sharing the experience from experts in DAC radial diffraction. DAC design, gasket optimization, sample preparation, data collection and analysis. Develop the challenging project of rheological studies:  Combining different heating methods with radial diffraction technique;  Gasket techniques: Be, (Kapton, amorphous boron, and epoxy), others;  Theoretical modeling and analysis improvement;  New techniques: rotational DAC and dynamic DAC.

7. Benefit to COMPRES Community 1.Pushing the technological frontier of rheology study in DAC; 2.Broadening the COMPRES community access to the DAC radial diffraction. The experts of DAC design, beamline scientists, structural refinement experts, rheology experts and potential users will assemble together to determine the way to coordinate the above efforts efficiently. Infrastructure proposal: “Rheology in DAC” (tentative title) will be submitted to COMPRES by a cooperative, multi-institutional team based on the discussions and feedbacks in this workshop

8. Location: HPCAT, Advanced Photon Source, Argonne National Laboratory Time: 2-day workshop before November, 2005 Beamtime: 2-shift hand-on experiments at ID-B and BM-D stations of HPCAT Sponsor: COMPRES Co-sponsor: HPCAT Workshop Organizers: Haozhe Liu (HPCAT/Carnegie Institution of Washington) Rudy Wenk (UC Berkeley) Thomas Duffy (Princeton University)

9. Potential attendees as speakers in the workshop 1a.Radial diffraction studies in DAC. William A. Bassett (Cornell University), “History, current status and future of DAC side diffraction”; Arthur L. Ruoff (Cornell University), “Yield strength from DAC side diffraction”; Anil Singh (National Aerospace Lab, India), “Modeling of stresses and strains of solids under static high pressure”; Rudy Wenk (UC Berkeley), “Deformation, development of anisotropy, and quantitative Rietveld texture analysis from DAC radial diffraction”; Thomas Duffy (Princeton University), “Strength, stain and stress from side diffraction in DAC’; Sebastien Merkel (UC Berkeley), “Applications of DAC side diffraction techniques, and gasket optimization”; Maddury Somayazulu (Geophysical Laboratory, Carnegie Institution), “Techniques and data analysis of DAC side diffraction”; Abby Kavner (UC at LA), “Some new studies” 1b.New opportunities for the radial diffraction studies in DAC Ho-kwang Mao (Geophysical Laboratory, Carnegie Institution), “Challenge of DAC radial diffraction techniques in Earth science”; Gary Chesnut (Los Alamos National Lab), “Compressibility and structural refinement: magic angle approach in DAC”;

10. Yanzhang Ma (Texas Tech University), “Rotational DAC: opportunity of rheology study in routine DAC sep-up geometry”; Choongshik Yoo (LLNL), “Opportunity of rheology studies under high PT conditions by dynamic DAC (d-DAC)”; Russell J. Hemley (Geophysical Lab, Carnegie Institution), “Overview the applications of side diffraction in DAC to multi-Mbar pressure”; Haozhe Liu (HPCAT), “DAC radial diffraction with heating capability by various techniques”; 2a.Refinement and texture analysis under high pressure Robert Dinnebier (Max Planck Institute, Stuttgart, Germany), “Non-routine structure determination from powders diffraction data at ambient and non-ambient conditions”; Yusheng Zhao (LANSCE, Los Alamos National Lab), “Structural refinement and preferred orientation from high pressure neutron data”; 2b.Rheology studies using large volume press Don J. Weidner (Stony Brook University), “Effect of plastic deformation in polycrystalline and single crystal MgO from diffraction studies in D-DIA”; Shun-ichiro Karato (Yale University), “Development of a rotational Drickamer apparatus for large-strain deformation experiments under high P-T conditions”; Yanbin Wang (GSECARS, University of Chicago), “Combine the D-DIA with Drickamer-type anvils”.

11. The corresponding travel supports are estimated as following: Students and junior scientists travel support:$12,000 $500/person, expect to support 24 students in COMPRES community; Invited speakers travel support: $8000 $500/person (domestic), 12 invited speakers. $1000/person (international), 2 invited speakers. Total Budget: $20,000

13. Gary L. Kinsland, and William A. Bassett, Modification of the diamond cell for measuring strain and the strength of materials at pressure up to 300 kilobar, Rev. Sci. Instrum., 47, 130 (1976). J. S. Weaver, T. Takahashi, and W. A. Bassett, Abstract in the Trans. AGU 53(4) (April 1972).

14. Singh, A. K., Mao, H. K., Shu, J. & Hemley, R. J. Estimation of single-crystal elastic moduli from polycrystalline x-ray diffraction at high pressure: Applications to FeO and iron Phys. Rev. Lett. 80, 2157-2160 (1998). Duffy TS, Shen GY, Heinz DL, Shu JF, Ma YZ, Mao HK, Hemley RJ, Singh AK Lattice strains in gold and rhenium under nonhydrostatic compression to 37 GPa Phys. Rev. B 60 (22): 15063-15073 (1999). Merkel S, Wenk H-R, Shu J, Shen G, Gillet P, Mao H-K, Hemley R J. Deformation of MgO aggregates at pressures of the lower mantle J. Geophys. Res. 107(B11), 2271, ECV3, 1–17 (2002). Wenk H-R, Gillet P, Mao H-K, Hemley R J. Deformation of polycrystalline iron up to 30 GPa and 1000K Phys. Earth Panet. Int. 145, 239–251 (2004). Merkel S, Yagi T. X-ray transparent gasket for diamond anvil cell high pressure experiments Rev. Sci. Instrum., 76, 046109 (2005). Lin, J. F., J. Shu, H. K. Mao, R. J. Hemley, and G. Shen, Rev. Sci. Instrum. 74, 4732 (2003).